Artykuły w czasopismach na temat „Forest ecosystems (Queensland)”

Habitat fragmentation is considered to be one of the greatest threats to biodiversity. Species richness is predicted to decrease with decreasing patch size and increasing isolation, and this has been shown in some ecosystems. However, few studies have specifically investigated the effects of fragmentation on specific vegetation types, or compared different vegetation types within the same region. In this study, we assessed the influence of habitat fragmentation and time since fire on the floristic composition, structure and diversity of three ecosystems with varying fire proneness within the Sunshine Coast region. This study found that the tall-open forest ecosystem (RE 12.9-10.14) had higher overall species richness within fixed sample areas used for this study than did either open forest (RE 12.5.3) or gallery rainforest (RE 12.3.1), because it was composed of species typical of each of these ecosystem types. Open forest species richness was found mostly in the lower stratum, whereas gallery rainforest diversity was found in the upper stratum. Species richness decreased with increasing isolation in the open forest ecosystem where seeds are mostly abiotically dispersed. However, this study did not find strong evidence for reduced species richness within smaller patches in any ecosystem type studied; instead, finding species richness decreased with increasing patch size in the open forest ecosystem. Overall, across ecosystems, time since fire affected vegetation structure, but in fire-prone ecosystems, time since fire was not a determinant of species richness within the sites studied.

Wetlands are one of the most biologically productive ecosystems. Wetland ecosystem services, ranging from provision of food security to climate change mitigation, are enormous, far outweighing those of dryland ecosystems per hectare. However, land use change and water regulation infrastructure have reduced connectivity in many river systems and with floodplain and estuarine wetlands. Mangrove forests are critical communities for carbon uptake and storage, pollution control and detoxification, and regulation of natural hazards. Although the clearing of mangroves in Australia is strictly regulated, Great Barrier Reef catchments have suffered landscape modifications and hydrological alterations that can kill mangroves. We used remote sensing datasets to investigate land cover change and both intra- and inter-annual seasonality in mangrove forests in a large estuarine region of Central Queensland, Australia, which encompasses a national park and Ramsar Wetland, and is adjacent to the Great Barrier Reef World Heritage site. We built a time series using spectral, auxiliary, and phenology variables with Landsat surface reflectance products, accessed in Google Earth Engine. Two land cover classes were generated (mangrove versus non-mangrove) in a Random Forest classification. Mangroves decreased by 1480 hectares (−2.31%) from 2009 to 2019. The overall classification accuracies and Kappa coefficient for 2008–2010 and 2018–2020 land cover maps were 95% and 95%, respectively. Using an NDVI-based time series we examined intra- and inter-annual seasonality with linear and harmonic regression models, and second with TIMESAT metrics of mangrove forests in three sections of our study region. Our findings suggest a relationship between mangrove growth phenology along with precipitation anomalies and severe tropical cyclone occurrence over the time series. The detection of responses to extreme events is important to improve understanding of the connections between climate, extreme weather events, and biodiversity in estuarine and mangrove ecosystems.

This paper investigated the utility of drone-based environmental monitoring to assist with forest inventory in Queensland private native forests (PNF). The research aimed to build capabilities to carry out forest inventory more efficiently without the need to rely on laborious field assessments. The use of drone-derived images and the subsequent application of digital photogrammetry to obtain information about PNFs are underinvestigated in southeast Queensland vegetation types. In this study, we used image processing to separate individual trees and digital photogrammetry to derive a canopy height model (CHM). The study was supported with tree height data collected in the field for one site. The paper addressed the research question “How well do drone-derived point clouds estimate the height of trees in PNF ecosystems?” The study indicated that a drone with a basic RGB camera can estimate tree height with good confidence. The results can potentially be applied across multiple land tenures and similar forest types. This informs the development of drone-based and remote-sensing image-processing methods, which will lead to improved forest inventories, thereby providing forest managers with recent, accurate, and efficient information on forest resources.

The recognition and effective portrayal of floristic heterogeneity is a complex issue for land classification. This study in Toohey Forest, south-east Queensland, examines the effects of mapping scale and environmental variables on a floristically heterogeneous area. Current Version 4.1 regional ecosystem mapping at 1: 1 00 000 scale maps Toohey Forest as a single regional ecosystem unit "12.11.5", described as an "open forest complex with Corymbia citriodora, Eucalyptus siderophloia, E. major on metamorphics ± interbedded volcanics". Plant taxa data from 50, 20 x 20 m sites comprising 247 native vascular plant taxa were collected, along with data for 17 environmental variables and 10 species richness categories. A priori site groupings of 1 :12 500 scale vegetation mapping and a geomorphic classifications of the area were examined using cluster analysis (UPGMA, Bray-Curtis Metric, β = –0.1) and ordination (SSH MDS). Biplots of several variables (shrub species richness, total species richness, per cent rock cover, CEC, carbon and phosphorus) were significantly (P < 0.05) correlated with the ordination axes derived from each of the two strata levels and the total taxa, for both geomorphological and vegetation mapping. Several variables (shrub, vine, woody and introduced species richness, and carbon, nitrogen, phosphorus, pH and CEC) varied significantly (P < 0.05) across both geomorphic categories and 1:12 500 scale vegetation community mapping. The ongoing reduction in regional ecosystem mapping scale, centred on the use of fine-scale geomorphology mapping, is likely to improve the representation of floristic patterns in heterogeneous environments.

The diet of the yellow-bellied glider (Petaurus australis) was examined at a site in north Queensland by extensive observation of individuals from 10 glider groups. The diet was assessed in four seasons over 12 months by collating large numbers of qualitative feeding observations and by analysis of faeces. Data were also collected on flowering and bark shedding in the forest. Sap feeding accounted for more than 80% of the feeding observations throughout the year. Nectar and pollen of eucalypts (Eucalyptus spp.) and banksias (Banksia spp.) accounted for much of the remainder of the diet although arthropods and honeydew were present in spring and summer. Faecal analysis was based on much smaller sample sizes but confirmed the qualitative result obtained from direct observations. It also revealed the presence of a wide variety of pollen types. Many of these could be attributed to incidental ingestion but at least six rain forest genera were moderately common in faeces, which is consistent with observations of brief and infrequent visits by gliders to these trees. Examination of eucalypt, banksia and other pollen types showed that 60-70% of pollen was devoid of cell contents, supporting earlier suggestions that gliders obtained protein from pollen digestion, but at this site also from harvesting arthropods. This study confirms the dependence of the yellow-bellied glider in north Queensland on the sap of the red stringybark (Eucalyptus resinifera) and that conservation of the yellow-bellied glider is intimately associated with the management of this tree species. The use of various species for nectar and pollen suggests that the yellow-bellied glider may be an important pollinator in these forests. Moreover, sap from the wounds created by gliders is used by a range of other animal species. These observations suggest that the yellow-bellied glider is likely to be a keystone species in the open-forest ecosystems of north Queensland and that it deserves special emphasis in management.

The aim of this study was to develop a method that will use satellite imagery to identify areas of high forest growth and productivity, as a primary input in prioritising revegetation sites for carbon sequestration. Using the Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data, this study analysed the annual net primary production (NPP) values (gC/m²) of images acquired from 2000 to 2013, covering the Condamine Catchment in southeast Queensland, Australia. With the analysis of annual rainfall data during the same period, three transitions of "normal to dry" years were identified to represent the future climate scenario considered in this study. The difference in the corresponding NPP values for each year was calculated, and subsequently averaged to the get the "<i>Mean of Annual NPP Difference</i>" (MAND) map. This layer identified the areas with increased net primary production despite the drought condition in those years. Combined with key thematic maps (i.e. regional ecosystems, land use, and tree canopy cover), the priority areas were mapped. The results have shown that there are over 42 regional ecosystem (RE) types in the study area that exhibited positive vegetation growth and productivity despite the decrease in annual rainfall. However, seven (7) of these RE types represents the majority (79 %) of the total high productivity area. A total of 10,736 ha were mapped as priority revegetation areas. This study demonstrated the use of MODIS-NPP imagery to map vegetation with high carbon sequestration rates necessary in prioritising revegetation sites.

Abstract Speedy and reliable measurements of soil soluble nitrogen (N) are critical for estimating N fluxes in forest ecosystems. The high temperature catalytic oxidation (HTCO) method was assessed and compared with persulfate oxidation (PO) to measure total soluble N in water, hot water, 2 m KCl, and 0.5 m K2SO4 extracts of 24 forest soils collected from south-east Queensland. All salt extracts were diluted 5-fold before measurement by the HTCO method to minimise the effects of salt precipitation on the surface of the Pt/Al2O3 catalysts that may impair oxidation efficiency. Drifts of sensitivity of signals in diluted KCl (0.4 m), K2SO4 (0.1 m), and water matrixes by the HTCO method were minor, with <2% in KCl matrix and <3% in K2SO4 and water matrices. Nitrogen recoveries from most standard N-containing compounds (5 mg/L) analysed by the HTCO method in all the matrices tested were >94%. The values of total soluble N in all extracts of soils obtained by both the PO and the HTCO methods were highly correlated. However, the HTCO method generally gave greater values than the PO method, particularly with high concentrations of N. We consider the HTCO method to be a simple, automated, rapid, quantitative, and reliable method for determining total soluble N in both water extracts and diluted salt extracts of forest soils.

Physical changes and flows of energy at the interface between two contrasting ecosystems affect the distribution of species across the ecotone. The maintenance and stability of the, often abrupt, transition between Australian rainforest and non-rainforests is often attributed to fire. We use pre-germination treatments of smoke and heat on soil seed bank samples to determine plant distributions across the edge between subtropical rainforest and an adjacent eucalypt-dominated wet sclerophyll forest. Soil seed bank collections at 15 m within the eucalypt forest had both significantly higher density and diversity of seedlings than those at 30 m, at the edge itself or at any site within the rainforest. This response was most apparent when a pre-germination smoke treatment was applied. We suggest that smoke is an important germination trigger for species regenerating at this interface. Our results confirm the importance of fire in determining and maintaining the nature of this ecotone.

Forest health is described and perceived in different ways by the general public, land owners, managers, politicians, and scientists, depending on their values and objectives. Native tree pathogens and diseases are often associated with negative impacts even though damage is limited or not widespread. Too often, the concepts of tree health and forest health are used interchangeably and are not related to scale. Similar to fire, occurrences of disease outbreaks focus on the negative effects. However, native pathogens often exist in equilibrium with natural forest communities so their critical ecological roles are not easily discernible. Examined holistically, native fungi and diseases, dead and dying trees, and the many complex ecological interactions among them provide valuable benefits that ultimately contribute to sustainable, healthy forest ecosystems.

Cockatoo grass [Alloteropsis semialata (R.Br.) A. Hitchc.] is considered a keystone species in northern Australian ecosystems as it provides a food resource for many species, including several endangered vertebrates. This study examined both local and regional environmental factors influencing cockatoo grass distribution and abundance in the Wet Tropics of north Queensland, Australia. Local distribution and abundance were investigated in the sclerophyll ecotone between open woodland and tall open forest, because little is known about cockatoo grass distribution within this habitat; also, the endangered northern bettong (Bettongia tropica) is restricted to this habitat and depends on cockatoo grass for its survival. Regional-scale modelling of distribution was undertaken to examine the climatic tolerances of cockatoo grass in Queensland. Density of cockatoo grass was negatively related to litter cover, soil moisture, and the presence of two dominant grass species, Themeda triandra [Forssk.(R.Br.) Stapf] and Cleistochloa subjuncea (C.E.Hubb.). Soil nutrients (N, C, S, and C : N ratio) were positively related to density of cockatoo grass. A late dry season experimental burn demonstrated that cockatoo grass had high survival to fire, with increased density and flowering in response to fire. Regional-scale modelling using climate variables indicated that cockatoo grass is more suited to the drier end of the sclerophyll habitat range. Cockatoo grass in the woodland-forest ecotone in the Wet Tropics appears to be influenced by several environmental features associated with the ground layer. The species benefits from the reduction in litter cover and competing grass species that result from management actions such as prescribed burning. Understanding of the factors limiting this species, both at a local and regional scale, can be used to guide management of this ecotone habitat for both cockatoo grass and the survival of other species that depend on it.

Ecological stoichiometry may be used to investigate the impacts of fire regime, as fire regime can influence the cycling and balance of elements within forest ecosystems. We investigated the effects of fire history on soil and litter stoichiometry in four forest sites in Queensland, Australia. Soil and litter in recently burned areas were compared with those in areas with no recent fire. Effects of burning on concentrations and ratios of multiple pools of carbon (C), nitrogen (N) and phosphorus (P) in soil varied between sites, indicating that site and fire regime characteristics regulate these responses. Labile pools of soil C, N and P were more responsive to burning than total pools, and labile soil C:P and N:P ratios tended to be lower in recently burned areas, consistent with our expectations. These changes suggest that the disparate volatilisation temperatures of these elements influence post-fire soil stoichiometry, and that P cycling may be enhanced in some post-fire environments. Fire-induced changes to litter chemistry were not consistent with soil effects, although litter was generally nutrient-enriched in recently burned areas. Our results reveal the potential for fire to alter elemental balances and thus modify C and nutrient cycling in the plant–soil system.

Abstract. Urbanisation is becoming increasingly important in terms of climate change and ecosystem functionality worldwide. We are only beginning to understand how the processes of urbanisation influence ecosystem dynamics, making peri-urban environments more vulnerable to nutrient losses. Brisbane in South East Queensland has the most extensive urban sprawl of all Australian cities. This research estimated the environmental impact of land use change associated with urbanisation by examining soil nitrogen (N) turnover and subsequent nitrous oxide (N2O) emissions using a fully automated system that measured emissions on a sub-daily basis. There was no significant difference in soil N2O emissions between the native dry sclerophyll eucalypt forest and an extensively grazed pasture, wherefrom only low annual emissions were observed amounting to 0.1 and 0.2 kg N2O ha−1 yr−1, respectively. The establishment of a fertilised turf grass lawn increased soil N2O emissions 18-fold (1.8 kg N2O ha−1 yr−1), with highest emissions occurring in the first 2 months after establishment. Once established, the turf grass lawn presented relatively low N2O emissions for the rest of the year, even after fertilisation and rain events. Soil moisture was significantly higher, and mineralised N accumulated in the fallow plots, resulting in the highest N2O emissions (2.8 kg N2O ha−1 yr−1) and significant nitrate (NO3−) losses, with up to 63 kg N ha−1 lost from a single rain event due to reduced plant cover removal. The study concludes that urbanisation processes creating peri-urban ecosystems can greatly modify N cycling and increase the potential for losses in the form of N2O and NO3−.

Abstract. In this paper, we investigate similarities of effects of soil environmental drivers on year-round daily soil fluxes of nitrous oxide and methane for three distinct semi-natural or natural ecosystems: temperate spruce forest, Germany; tropical rain forest, Queensland, Australia; and ungrazed semi-arid steppe, Inner Mongolia, China. Annual cumulative fluxes of nitrous oxide and methane varied markedly among ecosystems, with nitrous oxide fluxes being highest for the tropical forest site (tropical forest: 0.96 kg N ha−1 yr−1; temperate forest: 0.67 kg N ha−1 yr−1; steppe: 0.22 kg N ha−1 yr−1), while rates of soil methane uptake were approximately equal for the temperate forest (−3.45 kg C ha−1 yr−1) and the steppe (−3.39 kg C ha−1 yr−1), but lower for the tropical forest site (−2.38 kg C ha−1 yr−1). In order to allow for cross-site comparison of effects of changes in soil moisture and soil temperature on fluxes of methane and nitrous oxide, we used a normalization approach. Data analysis with normalized data revealed that, across sites, optimum rates of methane uptake are found at environmental conditions representing approximately average site environmental conditions. This might have rather important implications for understanding effects of climate change on soil methane uptake potential, since any shift in environmental conditions is likely to result in a reduction of soil methane uptake ability. For nitrous oxide, our analysis revealed expected patterns: highest nitrous oxide emissions under moist and warm conditions and large nitrous oxide fluxes if soils are exposed to freeze–thawing effects at sufficiently high soil moisture contents. However, the explanatory power of relationships of soil moisture or soil temperature to nitrous oxide fluxes remained rather poor (R2 ≤ 0.36). When combined effects of changes in soil moisture and soil temperature were considered, the explanatory power of our empirical relationships with regard to temporal variations in nitrous oxide fluxes were at maximum about 50%. This indicates that other controlling factors such as N and C availability or microbial community dynamics might exert a significant control on the temporal dynamic of nitrous oxide fluxes. Though underlying microbial processes such as nitrification and denitrification are sensitive to changes in the environmental regulating factors, important regulating factors like moisture and temperature seem to have both synergistic and antagonistic effects on the status of other regulating factors. Thus we cannot expect a simple relationship between them and the pattern in the rate of emissions, associated with denitrification or nitrification in the soils. In conclusion, we hypothesize that our approach of data generalization may prove beneficial for the development of environmental response models, which can be used across sites, and which are needed to help achieve a better understanding of climate change feedbacks on biospheric sinks or sources of nitrous oxide and methane.

Abstract. In this paper, we investigate similarities of effects of soil environmental drivers on year-round daily soil fluxes of nitrous oxide and methane for three distinct semi-natural or natural ecosystems: temperate spruce forest, Germany; tropical rain forest, Queensland, Australia; and ungrazed semi-arid steppe, Inner Mongolia, China. Annual cumulative fluxes of nitrous oxide and methane varied markedly among ecosystems, with nitrous oxide fluxes being highest for the tropical forest site (tropical forest: 0.96 kg N ha−1yr−1; temperate forest: 0.67 kg N ha−1yr−1; steppe: 0.22 kg N ha−1yr−1), while rates of soil methane uptake were approximately equal for the temperate forest (3.45 kg C ha−1yr−1) and the steppe (3.39 kg C ha−1yr−1), but lower for the tropical forest site (2.38 kg C ha−1yr−1). In order to allow for cross-site comparison of effects of changes in soil moisture and soil temperature on fluxes of methane and nitrous oxide, we used a normalization approach. Data analysis with normalized data revealed that across sites, optimum rates of methane uptake are found at environmental conditions representing approximately average site environmental conditions. This might have rather important implications for understanding effects of climate change on soil methane uptake potential, since any shift in environmental conditions is likely to result in a reduction of soil methane uptake ability. For nitrous oxide, our analysis revealed expected patterns: highest nitrous oxide emissions under moist and warm conditions and large nitrous oxide fluxes if soils are exposed to freeze-thawing effects at sufficient high soil moisture contents. However, the explanatory power of relationships of soil moisture or soil temperature to nitrous oxide fluxes remained rather poor (≤ 0.36). When combined effects of changes in soil moisture and soil temperature were considered, the explanatory power of our empirical relationships with regard to temporal variations in nitrous oxide fluxes were at maximum about 50%. This indicates that other controlling factors such as N and C availability or microbial community dynamics might exert a significant control on the temporal dynamic of nitrous oxide fluxes. Though underlying microbial processes such as nitrification and denitrification are sensitive to changes in the environmental regulating factors, important regulating factors like moisture and temperature seem to have both synergistic and antagonistic effects on the status of other regulating factors. Thus we cannot expect a~simple relationship between them and the pattern in the rate of emissions, associated with denitrification or nitrification in the soils. In conclusion, we hypothesize that our approach of data generalization may prove beneficial for the development of environmental response models which can be used across sites, and which are needed to help better understanding climate change feedbacks on biospheric sinks or sources of nitrous oxide and methane.

The summer season of 2019–2020 has been named Australia’s Black Summer because of the large forest fires that burnt for months in southeast Australia, affecting millions of Australia’s citizens and hundreds of millions of animals and capturing global media attention. This extensive fire season has been attributed to the global climate crisis, a long drought season and extreme fire weather conditions. Our aim in this study was to examine the factors that have led some of the wildfires to burn over larger areas for a longer duration and to cause more damage to vegetation. To this end, we studied all large forest and non-forest fires (>100 km2) that burnt in Australia between September 2019 and mid-February 2020 (Australia’s Black Summer fires), focusing on the forest fires in southeast Australia. We used a segmentation algorithm to define individual polygons of large fires based on the burn date from NASA’s Visible Infrared Imaging Radiometer Suite (VIIRS) active fires product and the Moderate Resolution Imaging Spectroradiometer (MODIS) burnt area product (MCD64A1). For each of the wildfires, we calculated the following 10 response variables, which served as proxies for the fires’ extent in space and time, spread and intensity: fire area, fire duration (days), the average spread of fire (area/days), fire radiative power (FRP; as detected by NASA’s MODIS Collection 6 active fires product (MCD14ML)), two burn severity products, and changes in vegetation as a result of the fire (as calculated using the vegetation health index (VHI) derived from AVHRR and VIIRS as well as live fuel moisture content (LFMC), photosynthetic vegetation (PV) and combined photosynthetic and non-photosynthetic vegetation (PV+NPV) derived from MODIS). We also computed more than 30 climatic, vegetation and anthropogenic variables based on remotely sensed derived variables, climatic time series and land cover datasets, which served as the explanatory variables. Altogether, 391 large fires were identified for Australia’s Black Summer. These included 205 forest fires with an average area of 584 km2 and 186 non-forest fires with an average area of 445 km2; 63 of the forest fires took place in southeast (SE) Australia (the area between Fraser Island, Queensland, and Kangaroo Island, South Australia), with an average area of 1097 km2. Australia’s Black Summer forest fires burnt for more days compared with non-forest fires. Overall, the stepwise regression models were most successful at explaining the response variables for the forest fires in SE Australia (n = 63; median-adjusted R2 of 64.3%), followed by all forest fires (n = 205; median-adjusted R2 of 55.8%) and all non-forest fires (n = 186; median-adjusted R2 of 48.2%). The two response variables that were best explained by the explanatory variables used as proxies for fires’ extent, spread and intensity across all models for the Black Summer forest and non-forest fires were the change in PV due to fire (median-adjusted R2 of 69.1%) and the change in VHI due to fire (median-adjusted R2 of 66.3%). Amongst the variables we examined, vegetation and fuel-related variables (such as previous frequency of fires and the conditions of the vegetation before the fire) were found to be more prevalent in the multivariate models for explaining the response variables in comparison with climatic and anthropogenic variables. This result suggests that better management of wildland–urban interfaces and natural vegetation using cultural and prescribed burning as well as planning landscapes with less flammable and more fire-tolerant ground cover plants may reduce fire risk to communities living near forests, but this is challenging given the sheer size and diversity of ecosystems in Australia.

Context Feral horses are a growing problem in Australia, despite implementation of management strategies. The incidence of horse sightings and horse-associated vehicle collisions within the Tuan and Toolara State Forest (TTSF), a coniferous plantation in south-eastern Queensland, has increased in the past decade, indicating an increase in population and the necessity to undertake an accurate appraisal of population abundance. Aim To determine the feasibility of using dung counts, defecation and dung-decay rates to determine the distribution and abundance of feral horse population in a managed coniferous plantation where dense vegetation prohibits the use of visual-based animal detection methods. Methods Population distribution was assessed by dung count incorporated into a vehicle strip-transect survey on 582 km of forest tracks. Population abundance was estimated from dung density, the mean defecation frequency of feral horses, and the mean number of days required for dung to decay. Dung density was obtained from on-ground distance line-transect survey that sampled all representative plantation habitats and consisted of 111 transects totalling 44.3 km. Key results The strip-transect survey clearly showed that although feral horses were dispersed across the plantation, the distribution was uneven, with the central region of the plantation being the most heavily populated. The combination of dung counts, defecation rate (mean ± s.d., 7.97 ± 8.74) over 24 h and dung-decay rate (444 ± 150.7 days) provided an estimation of the density of feral horses in various habitats and indicated that the plantation was occupied by 1321 (95% CI 940–1965) horses, which corresponded to an average density of 1.8 horses km–2. The method clearly identified variations in horse abundance among the various habitats within the surveyed areas. Open habitats, created following harvesting, showed higher occurrence rates, whereas the habitats of mature forest were scantily occupied. Key conclusions Dung counts are a simple, effective and practical technique that can provide information on distribution and abundance of feral horse population in densely forested habitats where visual-based techniques are not applicable. However, unbiased and precise defecation and decay rates must be estimated. Implications The study validated the use of dung counts to provide information on feral horse distribution and abundance in densely forested environments where direct methods of census may be difficult to obtain. The methods are applicable to a range of ecosystems, but defecation and dung-decay rates must be determined separately for each ecosystem.

Many mistletoe species are pests in agricultural and forest ecosystems throughout the world. Mistletoes are unusual “weeds” as they are generally endemic to areas where they achieve pest status and, therefore, classical biological control and broad-scale herbicidal control are usually impractical. In North American coniferous forests, dwarf mistletoe ( Arceuthobium spp.) infection results in major commercial losses and poses a public liability in recreation settings. Hyperparasitic fungi have potential as biological control agents of dwarf mistletoe, including species which attack shoots, berries, and the endophytic systems of dwarf mistletoe. Development of an inundative biological control strategy will be useful in situations where traditional silvicultural control is impractical or undesirable. In southern Australia, farm eucalypts are often attacked and killed by mistletoes ( Amyema spp.) in grazed landscapes where tree decline and biodiversity loss are major forms of land degradation. Although long-term strategies to achieve a balance between mistletoe and host abundance are promoted, many graziers want short-term options to treat severely infected trees. Recent research has revisited the efficiency and efficacy of silvicultural treatments and selective herbicides in appropriate situations. The results of recent research on these diverse management strategies in North America and Australia are summarized.

Concern over the long-term sustainability of post-mining ecosystems at Weipa (North Queensland, Australia) led to investigations of soil organic matter dynamics, a key process linking soil and vegetation development in maintenance-free systems. Paper I of this series examined the short-term effects of rehabilitation operations on soil organic matter. Here, we assess the medium-term development of post-rehabilitation soil organic matter quantity and quality using mine soil chronosequences of up to 22 years post-rehabilitation at Weipa. Soils had been respread either immediately after stripping or after stripped soil had been stockpiled for several years. Sites surveyed were revegetated with native tree and shrub species, forestry (Khaya senegalensis), or pasture (Brachiaria decumbens/Stylosanthes spp.). Three areas of undisturbed native forest were included for comparison. Compared with the undisturbed forest, rehabilitated soils were shallower and more compacted, contained more gravel, and, as a result of topsoil–subsoil mixing, stored less organic matter in the surface soil. Rehabilitated sites respread with stockpiled soil were more compacted and lower in all quantitative and qualitative measures of organic matter than freshly replaced soils. With time, organic matter accumulated in the surface soil under all vegetation types at rates of up to 1.25 t C/ha.year, but new equilibrium levels were yet to be reached. Accumulated organic matter was mostly associated with clay and silt-sized particles, indicating effective cycling of litter to humus. Nitrogen mineralisation capacity increased with time under all vegetation types. The incidence of fire led to increased total and light-fraction organic C, but this was probably as charcoal C. Sites where volunteer grass biomass was reduced pre-planting by late-season stripping or disc-ploughing accumulated less organic C. To optimise post-mining soil organic matter development, we recommend that soil stockpiling be avoided, that more volunteer grasses be retained to ensure continuity of organic inputs, and that attention be focussed on minimising soil compaction and gravel incorporation—both permanent limitations to plant growth.

Puccinia psidii Winter (myrtle rust, eucalyptus rust) is a significant pathogen of Eucalyptus plantations in Brazil, causing reduced growth, stem malformation, and in severe cases, tree death (3). It has a wide host range in the Myrtaceae, with over 445 species in more than 72 genera (4). As such, P. psidii has long been a threat to Australia, where many ecosystems are dominated by Myrtaceae and industries are reliant on myrtaceous hosts, including almost 1 million hectares of eucalypt plantations. In April 2010, P. psidii was detected in Australia (2) and is now established along the east coast from southern New South Wales to far north Queensland (1,5). Although known to cause severe damage to eucalypt seedlings and coppice in native forests (5), it had not been found affecting eucalypt plantations in Australia. Surveys for P. psidii were thus initiated in eucalypt plantations in NSW from the central coast (33°06′40.0″ S, 151°18′13.8″ E) to the NSW–Queensland border, encompassing 55 plantations. Two to four 100-tree transects were conducted per plantation, during spring and summer. Symptoms were first detected in December 2011 in a 6-month-old Eucalyptus agglomerata Maiden plantation on the central coast. Further surveys until summer 2014 identified P. psidii on E. pilularis Sm., E. cloeziana F. Muell., and E. grandis (Hill) Maiden in young plantations from the central coast to the north coast (30°24′20.2″ S, 152°55′57.9″ E) of NSW. Necrotic lesions and yellow pustules typical of P. psidii were present on immature leaves and shoots, often causing leaves to buckle and die. Urediniospores were globose to subglobose, yellowish brown, 15 to 20 × 18 to 23 μm, single-celled, and finely echinulate, with a prominent tonsure on the majority of spores. Teliospores were cylindrical to ellipsoidal with a rounded apex, tan brown, 25 to 45 × 15 to 25 μm, and two-celled, with remnants of a pedicel. These morphological characteristics are consistent with those of P. psidii from Australia and elsewhere (5). Simple Sequence Repeats developed from genome sequencing of an Australian isolate of P. psidii revealed no variation among 15 isolates of P. psidii from Australia and Hawaii, including an isolate from an E. pilularis plantation in NSW (K. S. Sandhu and R. F. Park, unpublished), corroborating the morphological identification. This is the first report of this significant pathogen in eucalypt plantations in Australia. P. psidii was found in only five plantations during the current surveys, in trees 6 months to 2 years old, with only a low incidence (1%) per plantation. Repeat surveys revealed no ongoing disease in the same plantations after trees were three years of age. Moreover, P. psidii was found only in plantations surrounded by native forest stands, which harbor a large reservoir of susceptible hosts, such as Rhodamnia rubescens (Benth.) Miq. The strain of P. psidii that entered Australia is currently not causing serious disease in eucalypt plantations. However, there is a need to continue quarantine restrictions to reduce the chance of another, more aggressive strain of P. psidii entering Australia. References: (1) A. J. Carnegie and J. R. Lidbetter. Australas. Plant Pathol. 41:13, 2012. (2) A. J. Carnegie et al. Australas. Plant Pathol. 39:463, 2010. (3) T. A. Coutinho et al. Plant Dis.82:819, 1998. (4) F. Giblin and A. J. Carnegie. Puccinia psidii (myrtle rust)—Global host list. Retrieved 2 October 2014 from http://www.anpc.asn.au/resources/Myrtle_Rust.html . (5) G. S. Pegg et al. Plant Pathol. 63:1005, 2014.

ABSTRACTRates of litterfall over a period of 3 y at one undisturbed site and two sites disturbed by selective harvesting are reported for a tropical rain forest area in North Queensland, Australia. Litterfall over a period of 18 months is also reported for a further undisturbed site in the same area. No significant differences were found in annual litterfall between the sites, with annual litterfall rates ranging from 5.0 to 6.0 t ha−1 y−1. These rates are considerably lower than those reported for other rain forest areas in Australia, and are within the lower ranges recorded for other tropical rain forests. Litterfall was found to be strongly seasonal at all sites with the maximum falls occurring from the end of the dry season to the end of the wet season. The between year variability of the sites was quite low, with the ratio of maximum to minimum production ranging from 1.05 to 1.20. The average percentages of leaves, wood and reproductive material in litterfall were similar at each site. Leaves were the dominant component of litterfall with the average proportion of the total litterfall ranging from 72% to 76% over the study period at each of the four sites. At certain times, however, the fall of wood and reproductive material was quite significant, comprising as much as 71% and 34% of litterfall respectively. A strong negative correlation was found between the fall of leaves and wood at all sites.

Wet sclerophyll forest (also called tall open forest) is unique to Australia, being dominated by tall trees of the genus Eucalyptus (Myrtaceae). In this paper, we refer to the wet sclerophyll forest in north-east Queensland as tropical wet sclerophyll forest. Tropical wet sclerophyll forest is a threatened ecosystem which is maintained by fire. Our study describes the community, relative abundance and trophic structure of birds using the tropical wet sclerophyll forest. We surveyed the birds and recorded 100 taxa, of which = 29% (n = 29) are endemic to north-east Queensland. The community is comprised predominantly of insect-eaters (58% of the species) and nectar-feeders (26%), along with smaller guilds of fruit-eaters (11%) and seed-eaters (5%). Despite comprising only a small geographic area (82 800 ha), tropical wet sclerophyll forest supports a high diversity of birds. We believe it is essential that the tropical wet sclerophyll forest be conserved and managed to maintain the full range of its biodiversity. Because the tropical wet sclerophyll forest is fire-adapted and fire-dependent, the use of prescribed fire as a modern management tool is imperative. Unless fire has a central role in managing tropical wet sclerophyll forest, then this forest type and its dependent species will cease to exist.

. In north-eastern Queensland, the Masked Owl Tyto novaehollandiae is a rare and taxonomically complex species in apparent decline. It has typically been recorded in open sclerophyll forest and woodland, often adjacent to cleared areas, but current records suggest a patchy distribution. We used all available high-veracity records of the Masked Owl in north-eastern Queensland to examine habitat associations based on regional ecosystem data, and present a spatial model of its potential distribution within the Cape York Peninsula, Wet Tropics and Einasleigh Uplands bioregions. We conclude that the currently disjointed distribution is probably because of a lack of systematic surveys and that this species might be more widespread than previously thought.

The nutrient contents and accessions in litterfall over a period of 3 y are reported for undisturbed areas and at two sites disturbed by selective harvesting in tropical rain forest in North Queensland, Australia. Mean concentrations (mg g&supminus1; dry weight) of nutrients in litterfall ranged from 10 to 12 for nitrogen; 0.33 to 0.43 for phosphorus; 3.6 to 4.3 for potassium; 6.0 to 10.5 for calcium; and 1.7 to 2.6 for magnesium. These concentrations are in the middle to lower part of the spectrum of values recorded for tropical forests. Accessions of nutrients in litterfall (kg ha&supminus1; y&supminus1;) ranged from 59 to 64 N; 1.9 to 2.4 P; 20 to 24 K; 34 to 63 Ca; and 9 to 16 Mg. These rates, particularly for N and P, are among the lowest recorded for tropical forests. There were no consistent between-site differences in total nutrient accessions in small litterfall. In terms of the contribution of litterfall to the accessions of nutrients to the forest floor, this suggests that the logged sites have recovered from the effects of selective harvesting within 25 y. Nutrient accessions at each site were distinctly seasonal, with maximum accessions occurring in the late dry season to late in the wet season. Leaf-fall accounted for the largest proportion of nutrient accessions over the study period, although at certain times accessions in both reproductive material and wood were significant. A cyclone which crossed the coast near the study sites resulted in large nutrient accessions over a short period but had little effect on the total annual accession. A comparison with previous studies of litterfall in Australian tropical rainforests indicates that nutrient return in litterfall is directly related to soil fertility.

Abstract Current knowledge of terrestrial ecosystem response to the Paleocene-Eocene Thermal Maximum (PETM; ca. 56 Ma) is largely based on the midlatitudes of the Northern Hemisphere. To more fully reconstruct global terrestrial ecosystem response to the PETM, we generated vegetation and biomarker proxy records from an outcrop section on the southern coast of Australia (∼60°S paleolatitude). We documented a rapid, massive, and sustained vegetation turnover as a response to regional PETM warming of ∼1–4 °C, abruptly transitioning from a warm temperate to a meso-megathermal rain forest similar to that of present-day northeastern Queensland, Australia. The onset of this vegetation change preceded the characteristic PETM carbon-isotope excursion (CIE) by several thousand years. The reconstructed ecosystem change is much stronger than in other Southern Hemisphere records, highlighting the need for consideration of regional paleoceanographic, paleogeographic, and biogeographic characteristics to fully understand the global terrestrial ecosystem response to PETM climate forcing.

Concern about the risk of harmful human-induced climate change has resulted in international efforts to reduce greenhouse gas emissions to the atmosphere. We review the international and national context for consideration of greenhouse abatement in native vegetation management and discuss potential options in Queensland. Queensland has large areas of productive or potentially productive land with native woody vegetation cover with approximately 76 million ha with woody cover remaining in 1991. High rates of tree clearing, predominantly to increase pasture productivity, continued throughout the 1990s with an average 345,000 ha/a estimated to have been cleared, including non-remnant (woody regrowth) as well as remnant vegetation. Estimates of greenhouse gas emissions associated with land clearing currently have a high uncertainty but clearing was reported to contribute a significant proportion of Australia's total greenhouse gas emissions from 1990 (21%) to 1999 (13%). In Queensland, greenhouse emissions from land clearing were estimated to have been 54.5 Mt CO2-e in 1999. Management of native vegetation for timber harvesting and the proliferation of woody vegetation (vegetation thickening) in the grazed woodlands also represent large carbon fluxes. Forestry (plantations and native forests) in Queensland was reported to be a 4.4 Mt CO2-e sink in 1999 but there are a lack of comprehensive data on timber harvesting in private hardwood forests. Vegetation thickening is reported for large areas of the c. 60 million ha grazed woodlands in Queensland. The magnitude of the carbon sink in 27 million ha grazed eucalypt woodlands has been estimated to be 66 Mt CO2-e/a but this sink is not currently included in Australia's inventory of anthropogenic greenhouse emissions. Improved understanding of the function and dynamics of natural and managed ecosystems is required to support management of native vegetation to preserve and enhance carbon stocks for greenhouse benefits while meeting objectives of sustainable and productive management and biodiversity protection.

ABSTRACTThis paper introduces studies of nutrient cycling in disturbed and undisturbed rain forest plots in the upper catchment of Birthday Creek, near Paluma, North Queensland. The catchment is underlain by granite and has soils of comparatively low fertility. Differences between unlogged plots and plots disturbed 25 years previously by selective logging are still apparent. Disturbed plots have soils with higher bulk densities and pH, lower CEC, kjeldahl nitrogen and available phosphorus concentrations, and changed species composition. The data suggest that recovery from selective logging is dependent on soil fertility and intensity of disturbance.

Great Barrier Reef catchments are under pressure from the effects of climate change, landscape modifications, and hydrology alterations. With the use of remote sensing datasets covering large areas, conventional methods of change detection can expose broad transitions, whereas workflows that excerpt data for time-series trends divulge more subtle transformations of land cover modification. Here, we combine both these approaches to investigate change and trends in a large estuarine region of Central Queensland, Australia, that encompasses a national park and is adjacent to the Great Barrier Reef World Heritage site. Nine information classes were compiled in a maximum likelihood post classification change analysis in 2004–2017. Mangroves decreased (1146 hectares), as was the case with estuarine wetland (1495 hectares), and saltmarsh grass (1546 hectares). The overall classification accuracies and Kappa coefficient for 2004, 2006, 2009, 2013, 2015, and 2017 land cover maps were 85%, 88%, 88%, 89%, 81%, and 92%, respectively. The cumulative area of open forest, estuarine wetland, and saltmarsh grass (1628 hectares) was converted to pasture in a thematic change analysis showing the “from–to” change. We generated linear regression relationships to examine trends in pixel values across the time series. Our findings from a trend analysis showed a decreasing trend (p value range = 0.001–0.099) in the vegetation extent of open forest, fringing mangroves, estuarine wetlands, saltmarsh grass, and grazing areas, but this was inconsistent across the study site. Similar to reports from tropical regions elsewhere, saltmarsh grass is poorly represented in the national park. A severe tropical cyclone preceding the capture of the 2017 Landsat 8 Operational Land Imager (OLI) image was likely the main driver for reduced areas of shoreline and stream vegetation. Our research contributes to the body of knowledge on coastal ecosystem dynamics to enable planning to achieve more effective conservation outcomes.

Because coral reefs are sensitive to land derived inputs of nutrient and sediment, there is concern worldwide for the effects of anthropogenic change in river catchments on reefs. Thirty-one river catchments drain directly into the waters of the Great Barrier Reef, NE Australia. This case study was undertaken on the floodplain of the Herbert River catchment in north Queensland, utilizing remote sensing and GIS to assess both spatial and temporal changes in freshwater wetlands and riparian forests. We demonstrate that there has been a very large reduction in the area of these ecosystems since European settlement in the mid nineteenth century, with an 80% decline in their extent since 1943. We provide a range of quantitative measures to show that the landscape diversity of these ecosystems has also declined. These changes are of importance in terms of regional, national and international trends. We argue that policy, planning and management reform is required if the remaining ecological, economic and social values of these systems and the adjacent Great Barrier Reef Marine Park are to be maintained.

Spotted gum (Corymbia citriodora spp. variegata; CCV) has been widely planted, has a wide natural distribution, and is the most important commercially harvested hardwood species in Queensland, Australia. It has a great capacity to sequester carbon, thus reducing the impact of CO2 emissions on climate. Belowground root biomass (BGB) plays an important role as a carbon sink in terrestrial ecosystems. To explore the potential of biomass and carbon accumulation belowground, we developed and validated models for CCV plantations in Queensland. The roots of twenty-three individual trees (size range 11.8–42.0 cm diameter at breast height) from three sites were excavated to a 1-m depth and were weighed to obtain BGB. Weighted nonlinear regression models were most reliable for estimating BGB. To evaluate the candidate models, the data set was cross-validated with 70% of the data used for training and 30% of the data used for testing. The cross-validation process was repeated 23 times and the validation of the models were averaged over 23 iterations. The best model for predicting spotted gum BGB was based on a single parameter, with the diameter at breast height (D) as an independent variable. The best equation BGB = 0.02933 × D2.5805 had an adjusted R2 of 0.854 and a mean absolute percentage error of 0.090%. This equation was tested against published BGB equations; the findings from this are discussed. Our equation is recommended to allow improved estimates of BGB for this species.

Abstract Mangroves are a dominant structural habitat within tropical and subtropical estuaries that provide a number of ecosystem services, including habitat for a range of crustaceans and fish. However, mangroves are one of the most threatened estuarine habitats globally, having been severely reduced in extent, and replaced by urban structures. Here, we test for the effects of both natural (e.g. seagrass, rock and mangroves habitat extent, and connectivity) and human (e.g. extent of urban area) landscape variables on the number and type of fish inhabiting mangroves forests. We used remote underwater video stations to quantify fish assemblages within mangroves at 150 sites in 30 estuaries across Queensland, Australia. Fish community structure was best explained by the extent of mangroves and seagrasses within an estuary, the distance to the estuary mouth, and the size of the estuary and catchment. Moderate catchment size and proximity to the estuary mouth increased species richness and abundance of harvestable fish at individual mangrove sites. In order to maintain mangrove fish assemblages and the functions they provide, management initiatives should focus on maintaining natural estuarine seascapes that are located closer to the mouth of estuaries, in particular, focusing on estuaries that have lower levels of catchment urbanization.

We monitored an area that was revegetated with the goal of restoring a Eucalyptus tereticornis open forest on former agricultural land in central, eastern Queensland. Revegetation involved: (1) planting 60 ha of previously cleared and heavily grazed land with eight local trees species; and (2) removing cattle grazing to encourage natural regeneration in areas where some mature trees remained. We compared the revegetation site to native pasture that had also been previously cleared, with only scattered paddock trees remaining, and continued to be managed for livestock production (an area similar to the revegetation site, prior to planting) and a remnant forest (reference area). Nine years since revegetation began there was some evidence that the revegetated site was diverging from pasture in terms of understorey plant composition, sapling density and topsoil C and N. There was little divergence in terms of plant species richness (native, introduced, grass, forb and woody plant richness), herbaceous biomass and woody plant regeneration. Some monitoring plots were subject to fire (prescribed fire and or wildfire) over the period of monitoring. With increasing time since fire, the richness of native species, introduced species and grass species (both native and introduced) declined, and forb and grass species richness declined with increasing litter biomass, suggesting that the occurrence of fire and the associated removal of litter biomass has a positive influence on herbaceous diversity in this ecosystem. Woody plant regeneration persisted through lignotubers at the revegetation site and at the pasture, but this regeneration was stunted at the pasture presumably due to livestock grazing. Hence areas of former E. tereticornis forest showed promising regenerative capacity where mature trees remained and where livestock grazing was removed.

The continent of Australia is currently warming approximately thirty-five percent faster than the rest of the globe, with the warmest year on record coinciding with the most extreme bush fires. While effects of ongoing climate change are apparent over the past century, Australia has experienced pronounced aridification since the Miocene/Pliocene, transitioning from tropical forests to more open habitats. To better contextualize on-going climate change, we assess the ecology and paleobiology of mammalian faunas in Australia from the Pliocene to the Present in the Darling Downs region of Queensland Australia. Via the analysis of stable isotopes from tooth enamel and dental microwear texture analysis of the chewing surfaces of teeth, we clarify the ecology and paleobiology of medium to large marsupials from the Pliocene Chinchilla Sands and Pleistocene Eastern Darling Downs faunas. By comparing these ancient marsupial mammal communities to extant marsupial mammals that inhabit these regions today, we further demonstrate that the most dramatic changes between past ecosystems are clearly between those of the Present and the Plio-Pleistocene—indicated that the Darling Downs region of today is disparate as compared to the past. Most notably, Macropus giganteus consumes vegetation that is ~5.6‰ higher in δ13C values today than during the past, indicating feeding in a significantly more open landscape. The Pliocene and Pleistocene of the Darling Downs are instead dominated by mixed-feeding and browsing taxa, with several taxa exhibiting diets disparate from modern analogues (e.g., an abundance of C4 browsers). Collectively, these deep-time temporal comparisons are a clear example of how ecological communities observed today do not represent the full range of ecological niches occupied in the past and highlight the dramatic climate-departures experienced today.

We investigated the effects of annual burning since 1952, triennial burning since 1973, fire exclusion since 1946 and infrequent wildfire (one fire in 61 years) on woody understorey vegetation in a dry sclerophyll eucalypt forest, south-eastern Queensland, Australia. We determined the influence of these treatments, and other site variables (rainfall, understorey density, topsoil C : N ratio, tree basal area, distance to watercourse and burn coverage) on plant taxa density, richness and composition. The richness of woody understorey taxa 0–1 m in height was not affected by burning treatments, but richness of woody plants 1–7.5 m in height was lower in the annually burnt treatment than in the triennially burnt treatment from 1989 to 2007. Fire frequency and other site variables explained 34% of the variation in taxa composition (three taxon groups and 10 species), of which 33% of the explained variance was explained by fire treatment and 46% was explained by other site variables. Annual burning between 1974 and 1993 was associated with lower understorey densities mainly due to reduced densities of eucalypts 1–7.5 m in height. Triennial burning during the same period was associated with higher densities of eucalypts 0–7.5 m in height relative to the annually burnt and unburnt treatments. Most woody taxa persisted in the frequently burnt treatments through resprouting mechanisms (e.g. lignotuberous regeneration), and fire patchiness associated with low-intensity burning was also found to be important. Persistence of plants <1 m tall demonstrates the resilience of woody taxa to repeated burning in this ecosystem, although they mainly exist in a suppressed growth state under annual burning.

This paper originates from a presentation at the IIIrd International Congress on Crassulacean Acid Metabolism, Cape Tribulation, Queensland, Australia, August 2001. Carbon isotope fractionation and nocturnal acid accumulation in Clusia osaensis Hammel-ined., C. �peninsulae Hammel-ined. and C. valerii Standl. were investigated during the seedling, epiphytic and hemiepiphytic phases in a lowland tropical forest in Costa Ricato study photosynthetic adaptations of different plant growth stages to their habitat. Foliar δ 13C values around -24 to -32‰ indicate predominant C3 fixation of CO2 and low crassulacean acid metabolism (CAM) activity in all three Clusia species. Only terrestrially rooted plants of C. osaensis showed increased CAM expression. However, all developmental stages exhibited significant CAM cycling as shown by significant day-night fluctuations of titratable protons and of malic and citric acid. In C. valerii and C. peninsulae, an increase in CAM expression with plant development was not observed, and CAM cycling in hemiepiphytic-stage plants was completely repressed during the high rainfall season. The expression of CAM in the three Clusia species is therefore not developmentally controlled but triggered by environmental factors such as water availability and light intensity. These factors remain relatively stable in this ecosystem and CAM is therefore not fully expressed. However, CAM cycling may be of ecophysiological significance in all life stages as it serves as a mechanism to improve carbon economy by reducing respiratory CO2 losses.

Dingoes and other wild dogs (Canis lupus dingo and hybrids) are generalist predators that consume a wide variety of different prey species within their range. Little is known, however, of the diets of dingoes in north-eastern Australia where the potential for impacts by dingoes exists. Recently new information has been provided on the diets of dingoes from several sites in Queensland, Australia, significantly adding to the body of published knowledge on ecosystems within this region. Further information on the diet of dingoes in north-eastern Australia is added from 1460 scats collected from five sites, representing tropical savannahs, tropical offshore islands (and a matched mainland area), dry sclerophyll forests and peri-urban areas on the fringe of Townsville. Macropods, possums and bandicoots were found to be common prey for dingoes in these areas. Evidence suggested that the frequency of prey remains in scats can be an unreliable indicator of predation risk to potential prey and it was found that novel and unexpected prey species appear in dingo diets as preferred prey become unavailable. The results support the generalisation that dingoes prefer medium- to large-sized native prey species when available but also highlight the capacity for dingoes to exploit populations of both large and small prey species that might not initially be considered at risk from predation based solely on data on scats.

Intense wet-season rainfall in January 2005 caused rivers in the Mackay–Whitsunday region of Queensland, Australia, to produce large discharges to the Great Barrier Reef (GBR) lagoon. The regional land use is dominated by sugarcane cultivation, beef grazing and urban uses. The high nutrient (nitrogen and phosphorus) fluxes from these land uses via river runoff produced a massive phytoplankton bloom in the GBR lagoon, which, after 9 days, had spread 150 km offshore. The plume and algal bloom surrounded inner-shelf reefs of the GBR such as Brampton Island Reef and its spread was tracked with a variety of satellite sensors including MODIS, SeaWiFS and Landsat over the 9-day period. The ability to be able to access imagery from a large number of satellite sensors allowed almost daily estimates of the extent of plume to be made, despite periods of cloud. Analysis of water samples from the plume revealed elevated (2–50 times higher) concentrations of Chlorophyll a (and hence phytoplankton biomass), up to 50 times higher than in non-flood conditions, nutrients (2–100 times higher) and herbicide residues (10–100 times higher) compared with GBR lagoon waters in non-discharge conditions. The concentration data from the samples and estimated exposure periods from the satellite images allowed estimates of the exposure of GBR marine ecosystems (coral reefs, the pelagic community, seagrass beds and mangrove forests) to the terrestrial contaminants to be made.

Context Mapping the habitat and distribution of a species is critical for developing effective conservation plans. Koala (Phascolarctos cinereus, Phascolarctidae) distribution is constrained by the nutritional and shelter requirements provided by a relatively small number of key tree species in any given area. Identifying these key species provides a practical foundation for mapping koala habitat and prioritising areas for conservation. Aims To determine key tree species for koalas in Noosa Shire (south-eastern Queensland, Australia) as a basis for mapping koala habitat quality. Methods We applied a faecal-pellet survey methodology in 1996/97 to assess evidence of use by koalas of 4031 trees from 96 randomly stratified survey sites across different eucalypt-forest and woodland communities. Results were compared with those from a later survey undertaken in 2001/02 involving 5535 trees from 195 sites that were distributed across broadly similar areas with the aim to investigate aspects of koala landscape ecology. Key results A total of 66.7% of the 1996/97 survey sites contained koala faecal pellets, recorded under 953 eucalypt trees (14 species) and 1670 non-eucalypt trees (27 species). The proportion of trees at a given survey site that had koala faecal pellets at the base ranged from 2.2% to 94.7% (mean = 31.13 ± 2.59% s.e.). For the 2001/02 dataset, koala pellets were found at 55.4% of sites, from 794 eucalypt and 2240 non-eucalypt trees. The proportion of trees with pellets ranged from 3% to 80% (mean = 21.07 ± 1.77% s.e.). Both the 1996/97 and 2001/02 surveys identified the same three tree species (forest red gum, Eucalyptus tereticornis, swamp mahogany, E. robusta, and tallowwood, E. microcorys) as the highest-ranked for koala use in the study area. Three additional species (red mahogany, E. resinifera, small-fruited grey gum, E. propinqua, and grey ironbark, E. siderophloia) were identified in the 1996/97 surveys as key eucalypt species. Of the non-eucalypts in the 1996/97 dataset, coast cypress pine (Callitris columellaris) and broad-leaved paperbark (Melaleuca quinquenervia) ranked highest for use by koalas, followed by pink bloodwood (Corymbia intermedia) and brush box (Lophostemon confertus). White bottlebrush (Callistemon salignus), hard corkwood (Endiandra sieberi), M. quinquenervia and C. intermedia ranked highest in the 2001/02 dataset. The findings showed significantly greater use of larger eucalypts (i.e. 300-mm to >600-mm diameter at breast height). Conclusions The identified key eucalypt species, being the critical limiting resource for koalas, were used to assign koala habitat-quality classes to mapped regional ecosystem types to create a Koala Habitat Atlas (KHA) for Noosa Shire. The combined two highest quality classes based on abundance of the key eucalypt species comprised only 15.7% of the total land area of the Shire. Implications The KHA approach provides a practical and repeatable method for developing koala habitat-suitability mapping for national-, regional- and local-scale conservation and recovery planning purposes.

Regrowth of native woody vegetation has the potential to provide an economically valuable source of carbon storage and other ecosystem services. There is a lack of readily applicable examples of how regrowth of forests and woodlands can be integrated with existing grazing production systems and provide soil-protection and water-retention benefits. A system of integrated vegetation bands (IVB) was applied to patchy regrowth of acacia and eucalypt vegetation in a grazed landscape of southern Queensland, Australia. Across a 39.8-ha catchment with 3–5% slope, regrowth of scattered native vegetation (18.4 ha) was surveyed and diameter at breast height and height for all woody plants were recorded. The IVB (6.3 ha) were then marked out as 25-m-wide bands set 100 m apart and offset at ~2–3% gradient to the contour line, retaining the densest/largest regrowth where possible. The data on diameter at breast height and height were analysed using allometric equations to compare aboveground biomass in the original regrowth condition (‘Original’) to that retained in the installed IVB (‘IVB-Riparian’). Estimates of aboveground biomass were calculated for the Original and IVB-Riparian and compared with three other potential regrowth-vegetation management ‘treatments’ in a desktop-modelling study. The models were designated as: (1) ‘Original’; (2) ‘Broad’ (broad-scale cleared with only a few large trees along a creek retained)’; (3) ‘Big Trees’ (only large trees >40 cm diameter at breast height retained); (4) ‘Riparian-IVB (bands of vegetation); and (5) ‘Riparian-IVB-Big Trees’ (large trees together with ‘IVB-Riparian’). In the non-forested area of the catchment, ‘Riparian-IVB-Big Trees’ (301 t), ‘Big Trees’ (249 t) and ‘Riparian-IVB’ (200 t) had the highest aboveground biomass retained, whereas ‘Broad’ resulted in the most pasture area (~33 ha) followed by ‘Riparian-IVB’ (~26 ha). The ‘Riparian-IVB’ treatment had the highest tree density within the vegetation bands and more than half (53%) of the original woody biomass in regrowth was retained on just under a quarter (23%) of the land area minimising the impact on the area of pasture/grazing land. This subsequently resulted in the ‘Riparian-IVB’ treatment having the highest carbon offset value (A$605 ha–1). The results demonstrate that the retention of native regrowth vegetation in either IVB or as large paddock trees can retain a large amount of aboveground biomass, with IVB having greater returns per hectare.

This study establishes the use of the Earth Observation Data for Ecosystem Monitoring (EODESM) to generate land cover and change classifications based on the United Nations Food and Agriculture Organisation (FAO) Land Cover Classification System (LCCS) and environmental variables (EVs) available within, or accessible from, Geoscience Australia’s (GA) Digital Earth Australia (DEA). Classifications representing the LCCS Level 3 taxonomy (8 categories representing semi-(natural) and/or cultivated/managed vegetation or natural or artificial bare or water bodies) were generated for two time periods and across four test sites located in the Australian states of Queensland and New South Wales. This was achieved by progressively and hierarchically combining existing time-static layers relating to (a) the extent of artificial surfaces (urban, water) and agriculture and (b) annual summaries of EVs relating to the extent of vegetation (fractional cover) and water (hydroperiod, intertidal area, mangroves) generated through DEA. More detailed classifications that integrated information on, for example, forest structure (based on vegetation cover (%) and height (m); time-static for 2009) and hydroperiod (months), were subsequently produced for each time-step. The overall accuracies of the land cover classifications were dependent upon those reported for the individual input layers, with these ranging from 80% (for cultivated, urban and artificial water) to over 95% (for hydroperiod and fractional cover). The changes identified include mangrove dieback in the southeastern Gulf of Carpentaria and reduced dam water levels and an associated expansion of vegetation in Lake Ross, Burdekin. The extent of detected changes corresponded with those observed using time-series of RapidEye data (2014 to 2016; for the Gulf of Carpentaria) and Google Earth imagery (2009–2016 for Lake Ross). This use case demonstrates the capacity and a conceptual framework to implement EODESM within DEA and provides countries using the Open Data Cube (ODC) environment with the opportunity to routinely generate land cover maps from Landsat or Sentinel-1/2 data, at least annually, using a consistent and internationally recognised taxonomy.

<p><strong>Background: </strong>The replacement of forest vegetation with agricultural crops, and their subsequent management generate an impact on the availability of nutrients in the soil. <strong>Objective: </strong>To investigate the impacts of land use change from a forest ecosystem to agricultural areas with organic and conventional amendments in the chemical properties of an Andosol. <strong>Methodology:</strong> The chemical properties (pH, electrical conductivity [EC], soil organic matter [SOM], Na, Ca, K, Mg, Cu, Zn, Mn and Fe content) of an Andosol under different soil use systems were evaluated; one forest or control and three agricultural (queensland nut, organic avocado and conventional avocado. <strong>Results:</strong> The results showed that changes in land use caused a significant increase in nutrients, mainly derived from the management and application of organic and inorganic fertilizers. <strong>Implications: </strong>Determine if there are significant differences in agricultural areas with organic and conventional practices, with respect to those determined in a merely forestry area, considering the latter as a control, since before the changes in land use, all the areas belonged to the same ecosystem. <strong>Conclusion: </strong>The results showed that changes in land use and its subsequent agricultural management caused a significant increase in the availability of nutrients, derived mainly from the application of organic and inorganic fertilizers, generating a positive effect on the yields of avocado and queensland nut crops, where specifically, there were substantial increases with conventional management practices.</p>

Hidden away at the ends of streets, behind suburban parks and community assets, there remain remnants of the coastal wallum heathlands that once stretched from Caloundra to Noosa, in Queensland, Australia. From late July to September, these areas explode with colour, a springtime wonderland of white wedding bush, delicate ground orchids, the pastels and brilliance of pink boronias, purple irises, and the diverse profusion of yellow bush peas. These gifts of nature are still relatively unknown and unappreciated, with most locals, and Australians at large, having little knowledge of the remarkable nature of the wallum, the nutrient-poor sandy soil that can be almost as acidic as battery acid, but which sustains a finely tuned ecosystem that, once cleared, cannot be regrown. These heathlands and woodlands, previously commonplace beyond the beach dunes of the coastal region, are now only found in a number of national parks and reserves, and suburban remnants.Image 1: The author wildflowering and making art (Photo: Judy Barrass)I too was one of those who had no idea of the joys of the wallum and heathland wildflowers, but it was the creative works of Kathleen McArthur and Judith Wright that helped initiate my education, my own wanderings, wildflowering, and love. Learning country has been a multi-faceted experience, extended and tested as walking becomes an embodied encounter, bodies and landscapes entwined (Lund), an imaginative reimagining, creative act and source of inspiration, a form of pilgrimage (Morrison), forging an intimate relationship (Somerville).Image 2: Women wildflowering next to Rainbow Beach (Photo: Susan Davis)Wandering—the experience shares some similar characteristics to walking, but may have less of a sense of direction and destination. It may become an experience that is relational, contemplative, connected to place. Wandering may be transitory but with impact that resonates across years. Such is the case of wandering for McArthur and Wright; the experience became deeply relational but also led to a destabilisation of values, where the walking body became “entangled in monumental historical and social structures” (Heddon and Turner). They called their walking and wandering “wildflowering”. Somerville said of the term: “Wildflowering was a word they created to describe their passion for Australian wildflower and their love of the places where they found them” (Somerville 2). However, wildflowering was also very much about the experience of wandering within nature, of the “art of seeing”, of learning and communing, but also of “doing”.Image 3: Kathleen McArthur and Judith Wright “wildflowering” north of Lake Currimundi. (Photo: Alex Jelinek, courtesy Alexandra Moreno)McArthur defined and described going wildflowering as meaningdifferent things to different people. There are those who, with magnifying glass before their eyes, looking every inch the scientist, count stamens, measure hairs, pigeon-hole all the definitive features neatly in order and scoff at common names. Others bring with them an artistic inclination, noting the colours and shapes and shadows in the intimate and in the general landscape. Then there are those precious few who find poetry in a Helmut Orchid “leaning its ear to the ground”; see “the trigger-flower striking the bee”; find secrets in Sun Orchids; see Irises as “lilac butterflies” and a fox in a Yellow Doubletail…There are as many different ways to approach the “art of seeing” as there are people who think and feel and one way is as worthy as any other to make of it an enjoyably sensuous experience… (McArthur, Australian Wildflowers 52-53)Wildflowering thus extends far beyond the scientific collector and cataloguer of nature; it is about walking and wandering within nature and interacting with it; it is a richly layered experience, an “art”, “a sensuous experience”, “an artistic inclination” where perception may be framed by the poetic.Their wildflowering drove McArthur and Wright to embark on monumental struggles. They became the voice for the voiceless lifeforms within the environment—they typed letters, organised meetings, lobbied politicians, and led community groups. In fact, they often had to leave behind the environments and places that brought them joy to use the tools of culture to protest and protect—to ensure we might be able to appreciate them today. Importantly, both their creativity and the activism were fuelled by the same wellspring: walking, wandering, and wildflowering.Women Wandering and WildfloweringWhen McArthur and Wright met in the early 1950s, they shared some similarities in terms of relatively privileged social backgrounds, their year of birth (1915), and a love of nature. They both had houses named after native plants (“Calanthe” for Wright’s house at Tambourine, “Midyim” for McArthur’s house at Caloundra), and were focussed on their creative endeavours—Wright with her poetry, McArthur with her wildflower painting and writing. Wright was by then well established as a highly regarded literary figure on the Australian scene. Her book of poetry The Moving Image (1946) had been well received, and later publications further consolidated her substance and presence on the national literary landscape. McArthur had been raised as the middle daughter of a prominent Queensland family; her father was Daniel Evans, of Evans Deakin Industries, and her mother “Kit” was a daughter of one of the pastoral Durack clan. Kathleen had married and given birth to three children, but by the 1950s was exploring new futures and identities, having divorced her husband and made a home for her family at Caloundra on Queensland’s Sunshine Coast. She had time and space in her life to devote to her own pursuits and some financial means provided through her inheritance to finance such endeavours.Wright and McArthur met in 1951 after McArthur sent Wright a children’s book for Judith and Jack McKinney’s daughter Meredith. The book was by McArthur’s cousins, Mary Durack (of Kings in Grass Castles fame) and Elizabeth Durack. Wright subsequently invited McArthur to visit her at Tambourine and from that visit their friendship quickly blossomed. While both women were to become known as high-profile nature lovers and conservationists, Wright acknowledges that it was McArthur who helped “train her eye” and cultivated her appreciation of the wildflowers of south-east Queensland:There are times in one’s past which remain warm and vivid, and can be taken out and looked at, so to speak, with renewed pleasure. Such, for me, were my first meetings in the early 1950s with Kathleen McArthur, and our continuing friendship. They brought me joys of discovery, new knowledge, and shared appreciation. Those “wild-flowering days” at Tamborine Mountain, Caloundra, Noosa or Lake Cootharaba, when I was able to wander with her, helped train my own eye a little to her ways of seeing and her devotion to the flowers of the coast, the mountains, and the wallum plains and swamps. (Wright quoted in McArthur, Australian Wildflowers 7)It was through this wandering and wildflowering that their friendship was forged, their knowledge of the plants and landscape grew and their passion was ignited. These acts of wandering were ones where feelings and the senses were engaged and celebrated. McArthur was to document her experiences of these environments through her wildflower paintings, cards, prints, weekly articles in the local newspapers, and books featuring Queensland and Australian Wildflowers (McArthur, Queensland Wildflowers; Living; Bush; Australian Wildflowers). Wright wrote a range of poems featuring landscapes and flora from the coastal experiences and doubtless influenced by their wildflowering experiences. These included, for example, Judith Wright’s poems “Wildflower Plain”, “Wonga Vine”, “Nameless Flower”, and “Sandy Swamp” (Collected Works).Through these acts of wildflowering, walking, and wandering, McArthur and Wright were drawn into activism and became what I call “wild/flower” women: women who cared for country, who formed a deep connection and intimate relationship with nature, with the more-than-human world; women who saw themselves not separate from nature but part of the great cycles of life, growth, death, and renewal; women whose relationship to the country, to the wildflowers and other living things was expressed through drawing, painting, poetry, stories, and performances—but that love driving them also to actions—actions to nurture and protect those wildflowers, places, and living things. This intimate relationship with nature was such that it inspired them to become “wild”, at times branded difficult, prompted to speak out, and step up to assume high profile roles on the public stage—and all because of their love of the small, humble, and often unseen.Wandering into Activism A direct link between “wildflowering” and activism can be identified in key experiences from 1953. That was the year McArthur devoted to “wildflowering”, visiting locations across the Sunshine Coast and South-East Queensland, documenting all that was flowering at different times of the year (McArthur, Living 15). She kept a monthly journal and also engaged in extensive drawing and painting. She was joined by Wright and her family for some of these trips, including one that would become a “monumental” expedition. They explored the area around Noosa and happened to climb to the top of Mt Tinbeerwah. Unlike many of the other volcanic plugs of the Sunshine Coast that would not be an easy climb for a family with young children, Tinbeerwah is a small volcanic peak, close to the road that runs between Cooroy and Tewantin, and one that is a relatively easy walk. From the car park, the trail takes you over volcanic lava flows, a pathway appearing, disappearing, winding through native grasses, modest height trees and to the edge of a dramatic cliff (one now popular with abseilers and adventurers). The final stretch brings you out above the trees to stunning 360-degree views, other volcanic peaks, a string of lakes and waterways, the patchwork greens of farmlands, distant blue oceans, and an expanse of bushland curving north for miles. Both women wrote about the experience and its subsequent significance: When Meredith was four years old, Kathleen McArthur, who was a great wildflower enthusiast and had become a good friend, invited us to join her on a wildflower expedition to the sand-plains north of Noosa. There the Noosa River spread itself out into sand-bottomed lakes between which the river meandered so slowly that everywhere the sky was serenely mirrored in it, trees hung low over it, birds haunted them.Kathleen took her little car, we took our converted van, and drove up the narrow unsealed road beyond Noosa. Once through the dunes—where the low bush-cover was white with wedding-bush and yellow with guinea-flower vines—the plains began, with many and mingled colours and scents. It was spring, and it welcomed us joyfully. (Wright, Half 279-280)McArthur also wrote about this event and its importance, as they both realised that this was territory that was worth protecting for posterity: ‘it was obvious that this was great wildflower country in addition to having a fascinating system of sand mass with related river and lakes. It would make a unique national park’ (McArthur, Living 53). After this experience, Kathleen and Judith began initial inquiries to find out about how to progress ideas for forming a national park (McArthur, Living). Brady affirms that it was Kathleen who first “broached the idea of agitating to have the area around Cooloola declared a National Park” (Brady 182), and it was Judith who then made inquiries in Brisbane on their way back to Mount Tambourine:Judith took the idea to Romeo Lahey of the National Parks Association who told her it was not threatened in any way whereas there were important areas of rainforest that were, and his association gave priority to those. If he had but known, it was threatened. The minerals sands prospectors were about to arrive, if not already in there. (McArthur, Living 53)These initial investigations were put on hold as the pair pursued their “private lives” and raised their children (McArthur, Living), but reignited throughout the 1960s. In 1962, McArthur and Wright were to become founding members of the Wildlife Preservation Society of Queensland (along with David Fleay and Brian Clouston), and Cooloola was to become one of one of their major campaigns (McArthur, Living 32). This came to the fore when they discovered there were multiple sand mining leases pending across the Cooloola region. It was at McArthur’s suggestion that a national postcard campaign was launched in 1969, with their organisation sending over 100,000 postcards across Australia to then be sent back to Joh Bjelke Peterson, the notoriously pro-development, conservative Queensland Premier. This is acknowledged as Australia’s first postcard campaign and was reported in national newspapers; The Australian called the Caloundra branch of WPSQ one of the “most militant cells” in Australia (25 May 1970). This was likely because of the extent of the WPSQ communications across media channels and persistence in taking on high profile critics, including the mining companies.It was to be another five years of campaigning before the national park was declared in 1975 (then named Cooloola National Park, now part of the Great Sandy). Wright was to then leave Queensland to live on a property near Braidwood (on the Southern Tablelands of New South Wales) and in a different political climate. However, McArthur stayed in Caloundra, maintaining her deep commitment to place and country, keeping on walking and wandering, painting, and writing. She campaigned to protect beach dunes, lobbied to have Pumicestone Passage added to the national heritage register (McArthur, Pumicestone), and fought to prevent the creation of canal estates on the Pumicestone passage. Following the pattern of previous campaigns, she engaged in detailed research, drawing on expertise nationally and internationally, and writing many submissions, newspaper columns, and letters.McArthur also advocated for the plants, the places, and forms of knowing that she loved, calling for “clear thinking and deep feeling” that would enable people to see, value, and care as she did, notably saying:Because our flowers have never settled into our consciousness they are not seen. People can drive through square miles of colourful, massed display of bloom and simply not see it. It is only when the mind opens that the flowers bloom. (McArthur, Bush 2)Her belief was that once you walked the country and could “see”, become familiar with, and fall in love with the wildflowers and their environment, you could not then stand by and see what you love destroyed. Her conservation activities and activism arose and was fed through her wildflowering and the deep knowledge and connections that were formed.Wildflowering and Wanderings of My OwnSo, what we can learn from McArthur and Wright, from our wild/flower women, their wanderings, and wildflowering?Over the past few years, I have walked the wallum country that they loved, recited their poetry, shared their work with others, walked with women in the present accompanied by resonances of the past. I have shared these experiences with friends, artists, and nature lovers. While wandering with one group of women one day, we discovered that a patch of wallum behind Sunshine Beach was due to be cleared for an aged care development. It is full of casuarina food trees visited by the endangered Glossy Black Cockatoos, but it is also full of old wallum banksias, a tree I have come to love, influenced in part by writing and art by McArthur, and my experiences of “wildflowering”.Banksia aemula—the wallum banksia—stands tall, often one of the tallest trees of our coastal heathlands and after which the wallum was named. A range of sources, including McArthur herself, identify the source of the tree’s name as an Aboriginal word:It is an Aboriginal word some say applied to all species of Banksia, and others say to Banksia aemula. The wallum, being up to the present practically useless for commercial purposes provides our best wildflower shows… (McArthur, Queensland Wildflowers 2)Gnarled, textured bark—soft grey and warm red browns, in parts almost fur—the flower heads, when young, feed the small birds and honeyeaters; the bees collect nectar to make honey. And the older heads—remnants on the ground left by glorious black cockatoos, whose beaks, the perfect pliers, crack pods open to recover the hidden seeds. In summer, as the new flowers burst open, every stage of the flower stem cycle is on show. The trees often stand together like familiar friends gossiping, providing shelter; they are protective, nurturing. Banksia aemula is a tree that, according to Thomas Petrie’s reminiscence of “early” Queensland, was significant to Aboriginal women, and might be “owned” by certain women:but certain men and women owned different fruit or flower-trees and shrubs. For instance, a man could own a bon-yi (Auaurcaria Bidwilli) tree, and a woman a minti (Banksia aemula)… (Petrie, Reminiscences 148)Banksia, wallum, women… the connection has existed for millennia. Women walking country, talking, observing, collecting, communing—and this tree was special to them as it has become for me. Who knows how old those trees are in that patch of forest and who may have been their custodians.Do I care about this? Yes, I do. How did I come to care? Through walking, through “wildflowering”, through stories, art, and experience. My connections have been forged by nature and culture, seeing McArthur’s art and reading Wright’s words, through walking the country with women, learning to know, and sharing a wildflowering culture. But knowing isn’t enough: wandering and wondering, has led to something more because now I care; now we must act. Along with some of the women I walked with, we have investigated council records; written to, and called, politicians and the developer; formed a Facebook group; met with various experts; and proposed alternatives. However, our efforts have not met with success as the history of the development application and approval was old and complex. Through wandering and “wildflowering”, we have had the opportunity to both lose ourselves and find ourselves, to escape, to learn, to discover. However, such acts are not necessarily aimless or lacking direction. As connections are forged, care and concern grows, and acts can shift from the humble and mundane, into the intentional and deliberate. The art of seeing and poetic perceptions may even transform into ecological action, with ramifications that can be both significant monumental. Such may be the power of “wildflowering”.ReferencesBrady, Veronica. South of My Days: A Biography of Judith Wright. Sydney: Angus & Robertson, 1998.Heddon, Deirdre and Cathy Turner. “Walking Women: Shifting the Tales and Scales of Mobility.” Contemporary Theatre Review 22.2 (2012): 224–236.Lund, Katrín. “Landscapes and Narratives: Compositions and the Walking Body.” Landscape Research 37.2 (2012): 225–237.McArthur, Kathleen. Queensland Wildflowers: A Selection. Brisbane: Jacaranda Press, 1959.———. The Bush in Bloom: A Wildflower Artist’s Year in Paintings and Words. Sydney: Kangaroo Press, 1982.———. Pumicestone Passage: A Living Waterway. Caloundra: Kathleen McArthur, 1978.———. Looking at Australian Wildflowers. Sydney: Kangaroo Press, 1986.———. Living on the Coast. Sydney: Kangaroo Press, 1989.Morrison, Susan Signe. “Walking as Memorial Ritual: Pilgrimage to the Past.” M/C Journal 21.4 (2018). 12 Aug. 2019 <http://journal.media-culture.org.au/index.php/mcjournal/article/view/1437>.Petrie, Constance Campbell, and Tom Petrie. Tom Petrie’s Reminiscences of Early Queensland. 4th ed. Brisbane: University of Queensland Press, 1992. Somerville, Margaret. Wildflowering: The Life and Places of Kathleen McArthur. Brisbane: University of Queensland Press, 2004.Wright, Judith. Collected Poems: 1942 to 1985. Sydney: Harper Collins, 2016.———. Half a Lifetime. Melbourne: Text Publishing, 1999.

IntroductionRegional identity is a constant construction, in which landscape, human activity and cultural imaginary build a narrative of place. For the Tasmanian Midlands, the interactions between history, ecology and agriculture both define place and present problems in how to recognise, communicate and balance these interactions. In this sense, regionality is defined not so much as a relation of margin to centre, but as a specific accretion of environmental and cultural histories. According weight to more-than-human perspectives, a region can be seen as a constellation of plant, animal and human interactions and demands, where creative art and design can make space and give voice to the dynamics of exchange between the landscape and its inhabitants. Consideration of three recent art and design projects based in the Midlands reveal the potential for cross-disciplinary research, embedded in both environment and community, to create distinctive and specific forms of connectivity that articulate a regional identify.The Tasmanian Midlands have been identified as a biodiversity hotspot (Australian Government), with a long history of Aboriginal cultural management disrupted by colonial invasion. Recent archaeological work in the Midlands, including the Kerry Lodge Archaeology and Art Project, has focused on the use of convict labour during the nineteenth century in opening up the Midlands for settler agriculture and transport. Now, the Midlands are placed under increasing pressure by changing agricultural practices such as large-scale irrigation. At the same time as this intensification of agricultural activity, significant progress has been made in protecting, preserving and restoring endemic ecologies. This progress has come through non-government conservation organisations, especially Greening Australia and their program Tasmanian Island Ark, and private landowners placing land under conservation covenants. These pressures and conservation activities give rise to research opportunities in the biological sciences, but also pose challenges in communicating the value of conservation and research outcomes to a wider public. The Species Hotel project, beginning in 2016, engaged with the aims of restoration ecology through speculative design while The Marathon Project, a multi-year curatorial art project based on a single property that contains both conservation and commercially farmed zones.This article questions the role of regionality in these three interconnected projects—Kerry Lodge, Species Hotel, and Marathon—sited in the Tasmanian Midlands: the three projects share a concern with the specificities of the region through engagement with specifics sites and their histories and ecologies, while also acknowledging the forces that shape these sites as far more mobile and global in scope. It also considers the interdisciplinary nature of these projects, in the crossover of art and design with ecological, archaeological and agricultural practices of measuring and intervening in the land, where communication and interpretation may be in tension with functionality. These projects suggest ways of working that connect the ecological and the cultural spheres; importantly, they see rural locations as sites of knowledge production; they test the value of small-scale and ephemeral interventions to explore the place of art and design as intervention within colonised landscape.Regions are also defined by overlapping circles of control, interest, and authority. We test the claim that these projects, which operate through cross-disciplinary collaboration and network with a range of stakeholders and community groups, successfully benefit the region in which they are placed. We are particularly interested in the challenges of working across institutions which both claim and enact connections to the region without being centred there. These projects are initiatives resulting from, or in collaboration with, University of Tasmania, an institution that has taken a recent turn towards explicitly identifying as place-based yet the placement of the Midlands as the gap between campuses risks attenuating the institution’s claim to be of this place. Paul Carter, in his discussion of a regional, site-specific collaboration in Alice Springs, flags how processes of creative place-making—operating through mythopoetic and story-based strategies—requires a concrete rather than imagined community that actively engages a plurality of voices on the ground. We identify similar concerns in these art and design projects and argue that iterative and long-term creative projects enable a deeper grappling with the complexities of shared regional place-making. The Midlands is aptly named: as a region, it is defined by its geographical constraints and relationships to urban centres. Heading south from the northern city of Launceston, travellers on the Midland Highway see scores of farming properties networking continuously for around 175 kilometres south to the outskirts of Brighton, the last major township before the Tasmanian capital city of Hobart. The town of Ross straddles latitude 42 degrees south—a line that has historically divided Tasmania into the divisions of North and South. The region is characterised by extensive agricultural usage and small remnant patches of relatively open dry sclerophyll forest and lowland grassland enabled by its lower attitude and relatively flatter terrain. The Midlands sit between the mountainous central highlands of the Great Western Tiers and the Eastern Tiers, a continuous range of dolerite hills lying south of Ben Lomond that slope coastward to the Tasman Sea. This area stretches far beyond the view of the main highway, reaching east in the Deddington and Fingal valleys. Campbell Town is the primary stopping point for travellers, superseding the bypassed towns, which have faced problems with lowering population and resulting loss of facilities.Image 1: Southern Midland Landscape, Ross, Tasmania, 2018. Image Credit: Patrick Sutczak.Predominantly under private ownership, the Tasmanian Midlands are a contested and fractured landscape existing in a state of ecological tension that has occurred with the dominance of western agriculture. For over 200 years, farmers have continually shaped the land and carved it up into small fragments for different agricultural agendas, and this has resulted in significant endemic species decline (Mitchell et al.). The open vegetation was the product of cultural management of land by Tasmanian Aboriginal communities (Gammage), attractive to settlers during their distribution of land grants prior to the 1830s and a focus for settler violence. As documented cartographically in the Centre for 21st Century Humanities’ Colonial Frontier Massacres in Central and Eastern Australia 1788–1930, the period 1820–1835, and particularly during the Black War, saw the Midlands as central to the violent dispossession of Aboriginal landowners. Clements argues that the culture of violence during this period also reflected the brutalisation that the penal system imposed upon its subjects. The cultivation of agricultural land throughout the Midlands was enabled by the provision of unfree convict labour (Dillon). Many of the properties granted and established during the colonial period have been held in multi-generational family ownership through to the present.Within this patchwork of private ownership, the tension between visibility and privacy of the Midlands pastures and farmlands challenges the capacity for people to understand what role the Midlands plays in the greater Tasmanian ecology. Although half of Tasmania’s land areas are protected as national parks and reserves, the Midlands remains largely unprotected due to private ownership. When measured against Tasmania’s wilderness values and reputation, the dry pasturelands of the Midland region fail to capture an equivalent level of visual and experiential imagination. Jamie Kirkpatrick describes misconceptions of the Midlands when he writes of “[f]latness, dead and dying eucalypts, gorse, brown pastures, salt—environmental devastation […]—these are the common impression of those who first travel between Spring Hill and Launceston on the Midland Highway” (45). However, Kirkpatrick also emphasises the unique intimate and intricate qualities of this landscape, and its underlying resilience. In the face of the loss of paddock trees and remnants to irrigation, change in species due to pasture enrichment and introduction of new plant species, conservation initiatives that not only protect but also restore habitat are vital. The Tasmanian Midlands, then, are pastoral landscapes whose seeming monotonous continuity glosses over the radical changes experienced in the processes of colonisation and intensification of agriculture.Underlying the Present: Archaeology and Landscape in the Kerry Lodge ProjectThe major marker of the Midlands is the highway that bisects it. Running from Hobart to Launceston, the construction of a “great macadamised highway” (Department of Main Roads 10) between 1820–1850, and its ongoing maintenance, was a significant colonial project. The macadam technique, a nineteenth century innovation in road building which involved the laying of small pieces of stone to create a surface that was relatively water and frost resistant, required considerable but unskilled labour. The construction of the bridge at Kerry Lodge, in 1834–35, was simultaneous with significant bridge buildings at other major water crossings on the highway, (Department of Main Roads 16) and, as the first water crossing south of Launceston, was a pinch-point through which travel of prisoners could be monitored and controlled. Following the completion of the bridge, the site was used to house up to 60 male convicts in a road gang undergoing secondary punishment (1835–44) and then in a labour camp and hiring depot until 1847. At the time of the La Trobe report (1847), the buildings were noted as being in bad condition (Brand 142–43). After the station was disbanded, the use of the buildings reverted to the landowners for use in accommodation and agricultural storage.Archaeological research at Kerry Lodge, directed by Eleanor Casella, investigated the spatial and disciplinary structures of smaller probation and hiring depots and the living and working conditions of supervisory staff. Across three seasons (2015, 2016, 2018), the emerging themes of discipline and control and as well as labour were borne out by excavations across the site, focusing on remnants of buildings close to the bridge. This first season also piloted the co-presence of a curatorial art project, which grew across the season to include eleven practitioners in visual art, theatre and poetry, and three exhibition outcomes. As a crucial process for the curatorial art project, creative practitioners spent time on site as participants and observers, which enabled the development of responses that interrogated the research processes of archaeological fieldwork as well as making connections to the wider historical and cultural context of the site. Immersed in the mundane tasks of archaeological fieldwork, the practitioners involved became simultaneously focused on repetitive actions while contemplating the deep time contained within earth. This experience then informed the development of creative works interrogating embodied processes as a language of site.The outcome from the first fieldwork season was earthspoke, an exhibition shown at Sawtooth, an artist-run initiative in Launceston in 2015, and later re-installed in Franklin House, a National Trust property in the southern suburbs of Launceston.Images 2 and 3: earthspoke, 2015, Installation View at Sawtooth ARI (top) and Franklin House (bottom). Image Credits: Melanie de Ruyter.This recontextualisation of the work, from contemporary ARI (artist run initiative) gallery to National Trust property enabled the project to reach different audiences but also raised questions about the emphases that these exhibition contexts placed on the work. Within the white cube space of the contemporary gallery, connections to site became more abstracted while the educational and heritage functions of the National Trust property added further context and unintended connotations to the art works.Image 4: Strata, 2017, Installation View. Image Credit: Karen Hall.The two subsequent exhibitions, Lines of Site (2016) and Strata (2017), continued to test the relationship between site and gallery, through works that rematerialised the absences on site and connected embodied experiences of convict and archaeological labour. The most recent iteration of the project, Strata, part of the Ten Days on the Island art festival in 2017, involved installing works at the site, marking with their presence the traces, fragments and voids that had been reburied when the landscape returned to agricultural use following the excavations. Here, the interpretive function of the works directly addressed the layered histories of the landscape and underscored the scope of the human interventions and changes over time within the pastoral landscape. The interpretative role of the artworks formed part of a wider, multidisciplinary approach to research and communication within the project. University of Manchester archaeology staff and postgraduate students directed the excavations, using volunteers from the Launceston Historical Society. Staff from Launceston’s Queen Victorian Museum and Art Gallery brought their archival and collection-based expertise to the site rather than simply receiving stored finds as a repository, supporting immediate interpretation and contextualisation of objects. In 2018, participation from the University of Tasmania School of Education enabled a larger number of on-site educational activities than afforded by previous open days. These multi-disciplinary and multi-organisational networks, drawn together provisionally in a shared time and place, provided rich opportunities for dialogue. However, the challenges of sustaining these exchanges have meant ongoing collaborations have become more sporadic, reflecting different institutional priorities and competing demands on participants. Even within long-term projects, continued engagement with stakeholders can be a challenge: while enabling an emerging and concrete sense of community, the time span gives greater vulnerability to external pressures. Making Home: Ecological Restoration and Community Engagement in the Species Hotel ProjectImages 5 and 6: Selected Species Hotels, Ross, Tasmania, 2018. Image Credits: Patrick Sutczak. The Species Hotels stand sentinel over a river of saplings, providing shelter for animal communities within close range of a small town. At the township of Ross in the Southern Midlands, work was initiated by restoration ecologists to address the lack of substantial animal shelter belts on a number of major properties in the area. The Tasmania Island Ark is a major Greening Australia restoration ecology initiative, connecting 6000 hectares of habitat across the Midlands. Linking larger forest areas in the Eastern Tiers and Central Highlands as well as isolated patches of remnant native vegetation, the Ark project is vital to the ongoing survival of local plant and animal species under pressure from human interventions and climate change. With fragmentation of bush and native grasslands in the Midland landscape resulting in vast open plains, the ability for animals to adapt to pasturelands without shelter has resulted in significant decline as animals such as the critically endangered Eastern Barred Bandicoot struggle to feed, move, and avoid predators (Cranney). In 2014 mass plantings of native vegetation were undertaken along 16km of the serpentine Macquarie River as part of two habitat corridors designed to bring connectivity back to the region. While the plantings were being established a public art project was conceived that would merge design with practical application to assist animals in the area, and draw community and public attention to the work that was being done in re-establishing native forests. The Species Hotel project, which began in 2016, emerged from a collaboration between Greening Australia and the University of Tasmania’s School of Architecture and Design, the School of Land and Food, the Tasmanian College of the Arts and the ARC Centre for Forest Value, with funding from the Ian Potter Foundation. The initial focus of the project was the development of interventions in the landscape that could address the specific habitat needs of the insect, small mammal, and bird species that are under threat. First-year Architecture students were invited to design a series of structures with the brief that they would act as ‘Species Hotels’, and once created would be installed among the plantings as structures that could be inhabited or act as protection. After installation, the privately-owned land would be reconfigured so to allow public access and observation of the hotels, by residents and visitors alike. Early in the project’s development, a concern was raised during a Ross community communication and consultation event that the surrounding landscape and its vistas would be dramatically altered with the re-introduced forest. While momentary and resolved, a subtle yet obvious tension surfaced that questioned the re-writing of an established community’s visual landscape literacy by non-residents. Compact and picturesque, the architectural, historical and cultural qualities of Ross and its location were not only admired by residents, but established a regional identity. During the six-week intensive project, the community reach was expanded beyond the institution and involved over 100 people including landowners, artists, scientists and school children from the region (Wright), attempting to address and channel the concerns of residents about the changing landscape. The multiple timescales of this iterative project—from intensive moments of collaboration between stakeholders to the more-than-human time of tree growth—open spaces for regional identity to shift as both as place and community. Part of the design brief was the use of fully biodegradable materials: the Species Hotels are not expected to last forever. The actual installation of the Species Hotelson site took longer than planned due to weather conditions, but once on site they were weathering in, showing signs of insect and bird habitation. This animal activity created an opportunity for ongoing engagement. Further activities generated from the initial iteration of Species Hotel were the Species Hotel Day in 2017, held at the Ross Community Hall where presentations by scientists and designers provided feedback to the local community and presented opportunities for further design engagement in the production of ephemeral ‘species seed pies’ placed out in and around Ross. Architecture and Design students have gone on to develop more examples of ‘ecological furniture’ with a current focus on insect housing as well as extrapolating from the installation of the Species Hotels to generate a VR visualisation of the surrounding landscape, game design and participatory movement work that was presented as part of the Junction Arts Festival program in Launceston, 2017. The intersections of technologies and activities amplified the lived in and living qualities of the Species Hotels, not only adding to the connectivity of social and environmental actions on site and beyond, but also making a statement about the shared ownership this project enabled.Working Property: Collaboration and Dialogues in The Marathon Project The potential of iterative projects that engage with environmental concerns amid questions of access, stewardship and dialogue is also demonstrated in The Marathon Project, a collaborative art project that took place between 2015 and 2017. Situated in the Northern Midland region of Deddington alongside the banks of the Nile River the property of Marathon became the focal point for a small group of artists, ecologists and theorists to converge and engage with a pastoral landscape over time that was unfamiliar to many of them. Through a series of weekend camps and day trips, the participants were able to explore and follow their own creative and investigative agendas. The project was conceived by the landowners who share a passion for the history of the area, their land, and ideas of custodianship and ecological responsibility. The intentions of the project initially were to inspire creative work alongside access, engagement and dialogue about land, agriculture and Deddington itself. As a very small town on the Northern Midland fringe, Deddington is located toward the Eastern Tiers at the foothills of the Ben Lomond mountain ranges. Historically, Deddington is best known as the location of renowned 19th century landscape painter John Glover’s residence, Patterdale. After Glover’s death in 1849, the property steadily fell into disrepair and a recent private restoration effort of the home, studio and grounds has seen renewed interest in the cultural significance of the region. With that in mind, and with Marathon a neighbouring property, participants in the project were able to experience the area and research its past and present as a part of a network of working properties, but also encouraging conversation around the region as a contested and documented place of settlement and subsequent violence toward the Aboriginal people. Marathon is a working property, yet also a vital and fragile ecosystem. Marathon consists of 1430 hectares, of which around 300 lowland hectares are currently used for sheep grazing. The paddocks retain their productivity, function and potential to return to native grassland, while thickets of gorse are plentiful, an example of an invasive species difficult to control. The rest of the property comprises eucalypt woodlands and native grasslands that have been protected under a conservation covenant by the landowners since 2003. The Marathon creek and the Nile River mark the boundary between the functional paddocks and the uncultivated hills and are actively managed in the interface between native and introduced species of flora and fauna. This covenant aimed to preserve these landscapes, linking in with a wider pattern of organisations and landowners attempting to address significant ecological degradation and isolation of remnant bushland patches through restoration ecology. Measured against the visibility of Tasmania’s wilderness identity on the national and global stage, many of the ecological concerns affecting the Midlands go largely unnoticed. The Marathon Project was as much a project about visibility and communication as it was about art and landscape. Over the three years and with its 17 participants, The Marathon Project yielded three major exhibitions along with numerous public presentations and research outputs. The length of the project and the autonomy and perspectives of its participants allowed for connections to be formed, conversations initiated, and greater exposure to the productivity and sustainability complexities playing out on rural Midland properties. Like Kerry Lodge, the 2015 first year exhibition took place at Sawtooth ARI. The exhibition was a testing ground for artists, and a platform for audiences, to witness the cross-disciplinary outputs of work inspired by a single sheep grazing farm. The interest generated led to the rethinking of the 2016 exhibition and the need to broaden the scope of what the landowners and participants were trying to achieve. Image 7: Panel Discussion at Open Weekend, 2016. Image Credit: Ron Malor.In November 2016, The Marathon Project hosted an Open Weekend on the property encouraging audiences to visit, meet the artists, the landowners, and other invited guests from a number of restoration, conservation, and rehabilitation organisations. Titled Encounter, the event and accompanying exhibition displayed in the shearing shed, provided an opportunity for a rhizomatic effect with the public which was designed to inform and disseminate historical and contemporary perspectives of land and agriculture, access, ownership, visitation and interpretation. Concluding with a final exhibition in 2017 at the University of Tasmania’s Academy Gallery, The Marathon Project had built enough momentum to shape and inform the practice of its participants, the knowledge and imagination of the public who engaged with it, and make visible the precarity of the cultural and rural Midland identity.Image 8. Installation View of The Marathon Project Exhibition, 2017. Image Credit: Patrick Sutczak.ConclusionThe Marathon Project, Species Hotel and the Kerry Lodge Archaeology and Art Project all demonstrate the potential of site-based projects to articulate and address concerns that arise from the environmental and cultural conditions and histories of a region. Beyond the Midland fence line is a complex environment that needed to be experienced to be understood. Returning creative work to site, and opening up these intensified experiences of place to a public forms a key stage in all these projects. Beyond a commitment to site-specific practice and valuing the affective and didactic potential of on-site installation, these returns grapple with issues of access, visibility and absence that characterise the Midlands. Paul Carter describes his role in the convening of a “concretely self-realising creative community” in an initiative to construct a meeting-place in Alice Springs, a community defined and united in “its capacity to imagine change as a negotiation between past, present and future” (17). Within that regional context, storytelling, as an encounter between histories and cultures, became crucial in assembling a community that could in turn materialise story into place. In these Midlands projects, a looser assembly of participants with shared interests seek to engage with the intersections of plant, human and animal activities that constitute and negotiate the changing environment. The projects enabled moments of connection, of access, and of intervention: always informed by the complexities of belonging within regional locations.These projects also suggest the need to recognise the granularity of regionalism: the need to be attentive to the relations of site to bioregion, of private land to small town to regional centre. The numerous partnerships that allow such interconnect projects to flourish can be seen as a strength of regional areas, where proximity and scale can draw together sets of related institutions, organisations and individuals. However, the tensions and gaps within these projects reveal differing priorities, senses of ownership and even regional belonging. Questions of who will live with these project outcomes, who will access them, and on what terms, reveal inequalities of power. Negotiations of this uneven and uneasy terrain require a more nuanced account of projects that do not rely on the geographical labelling of regions to paper over the complexities and fractures within the social environment.These projects also share a commitment to the intersection of the social and natural environment. They recognise the inextricable entanglement of human and more than human agencies in shaping the landscape, and material consequences of colonialism and agricultural intensification. Through iteration and duration, the projects mobilise processes that are responsive and reflective while being anchored to the materiality of site. Warwick Mules suggests that “regions are a mixture of data and earth, historically made through the accumulation and condensation of material and informational configurations”. Cross-disciplinary exchanges enable all three projects to actively participate in data production, not interpretation or illustration afterwards. Mules’ call for ‘accumulation’ and ‘configuration’ as productive regional modes speaks directly to the practice-led methodologies employed by these projects. The Kerry Lodge and Marathon projects collect, arrange and transform material taken from each site to provisionally construct a regional material language, extended further in the dual presentation of the projects as off-site exhibitions and as interventions returning to site. The Species Hotel project shares that dual identity, where materials are chosen for their ability over time, habitation and decay to become incorporated into the site yet, through other iterations of the project, become digital presences that nonetheless invite an embodied engagement.These projects centre the Midlands as fertile ground for the production of knowledge and experiences that are distinctive and place-based, arising from the unique qualities of this place, its history and its ongoing challenges. Art and design practice enables connectivity to plant, animal and human communities, utilising cross-disciplinary collaborations to bring together further accumulations of the region’s intertwined cultural and ecological landscape.ReferencesAustralian Government Department of the Environment and Energy. Biodiversity Conservation. Canberra: Commonwealth of Australia, 2018. 1 Apr. 2019 <http://www.environment.gov.au/biodiversity/conservation>.Brand, Ian. The Convict Probation System: Van Diemen’s Land 1839–1854. Sandy Bay: Blubber Head Press, 1990.Carter, Paul. “Common Patterns: Narratives of ‘Mere Coincidence’ and the Production of Regions.” Creative Communities: Regional Inclusion & the Arts. Eds. Janet McDonald and Robert Mason. Bristol: Intellect, 2015. 13–30.Centre for 21st Century Humanities. Colonial Frontier Massacres in Central and Eastern Australia 1788–1930. Newcastle: Centre for 21st Century Humanitie, n.d. 1 Apr. 2019 <https://c21ch.newcastle.edu.au/colonialmassacres/>.Clements, Nicholas. The Black War: Fear, Sex and Resistance in Tasmania. St Lucia: U of Queensland P, 2014. Cranney, Kate. Ecological Science in the Tasmanian Midlands. Melbourne: Bush Heritage Australia, 2016. 1 Apr. 2019 <https://www.bushheritage.org.au/blog/ecological-science-in-the-tasmanian-midlands>.Davidson N. “Tasmanian Northern Midlands Restoration Project.” EMR Summaries, Journal of Ecological Management & Restoration, 2016. 10 Apr. 2019 <https://site.emrprojectsummaries.org/2016/03/07/tasmanian-northern-midlands-restoration-project/>.Department of Main Roads, Tasmania. Convicts & Carriageways: Tasmanian Road Development until 1880. Hobart: Tasmanian Government Printer, 1988.Dillon, Margaret. “Convict Labour and Colonial Society in the Campbell Town Police District: 1820–1839.” PhD Thesis. U of Tasmania, 2008. <https://eprints.utas.edu.au/7777/>.Gammage, Bill. The Biggest Estate on Earth: How Aborigines Made Australia. Crows Nest: Allen & Unwin, 2012.Greening Australia. Building Species Hotels, 2016. 1 Apr. 2019 <https://www.greeningaustralia.org.au/projects/building-species-hotels/>.Kerry Lodge Archaeology and Art Project. Kerry Lodge Convict Site. 10 Mar. 2019 <http://kerrylodge.squarespace.com/>.Kirkpatrick, James. “Natural History.” Midlands Bushweb, The Nature of the Midlands. Ed. Jo Dean. Longford: Midlands Bushweb, 2003. 45–57.Mitchell, Michael, Michael Lockwood, Susan Moore, and Sarah Clement. “Building Systems-Based Scenario Narratives for Novel Biodiversity Futures in an Agricultural Landscape.” Landscape and Urban Planning 145 (2016): 45–56.Mules, Warwick. “The Edges of the Earth: Critical Regionalism as an Aesthetics of the Singular.” Transformations 12 (2005). 1 Mar. 2019 <http://transformationsjournal.org/journal/issue_12/article_03.shtml>.The Marathon Project. <http://themarathonproject.virb.com/home>.University of Tasmania. Strategic Directions, Nov. 2018. 1 Mar. 2019 <https://www.utas.edu.au/vc/strategic-direction>.Wright L. “University of Tasmania Students Design ‘Species Hotels’ for Tasmania’s Wildlife.” Architecture AU 24 Oct. 2016. 1 Apr. 2019 <https://architectureau.com/articles/university-of-tasmania-students-design-species-hotels-for-tasmanias-wildlife/>.