Bibliografías temáticas / Restoration ecology – Western Australia

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Literatura académica sobre el tema "Restoration ecology – Western Australia"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "Restoration ecology – Western Australia"

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McChesney, Catherine J., John M. Koch y David T. Bell. "Jarrah Forest Restoration in Western Australia: Canopy and Topographic Effects". Restoration Ecology 3, n.º 2 (junio de 1995): 105–10. http://dx.doi.org/10.1111/j.1526-100x.1995.tb00083.x.

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Rokich, Deanna P., Kingsley W. Dixon, K. Sivasithamparam y Kathy A. Meney. "Topsoil Handling and Storage Effects on Woodland Restoration in Western Australia". Restoration Ecology 8, n.º 2 (junio de 2000): 196–208. http://dx.doi.org/10.1046/j.1526-100x.2000.80027.x.

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Gardner, John H. y David T. Bell. "Bauxite Mining Restoration by Alcoa World Alumina Australia in Western Australia: Social, Political, Historical, and Environmental Contexts". Restoration Ecology 15 (12 de diciembre de 2007): S3—S10. http://dx.doi.org/10.1111/j.1526-100x.2007.00287.x.

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Rokich, Deanna P. y Kingsley W. Dixon. "Recent advances in restoration ecology, with a focus on the Banksia woodland and the smoke germination tool". Australian Journal of Botany 55, n.º 3 (2007): 375. http://dx.doi.org/10.1071/bt06108.

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This paper details some of the recent research findings concerning restoration needs of the Banksia woodland in Western Australia, including the importance of, and recent advances in, smoke-technology research. Research has enabled testing of a wide spectrum of restoration technologies that enhance plant replacement at sites via treatments of the topsoil seedbank, broadcast seed and seedlings. By the use of smoke technology, which in some systems produces a 48-fold increase in the total number of germinants and a 3-fold increase in the number of species at restoration sites, improved species replacement is a very real possibility in Banksia woodland. At the same time, some commonly employed practices in restoration are a cause for concern, including the application of a herbicide widely used to control a priority Banksia-woodland weed and fire-suppressing agents used to assist fire management. These findings may have broader implications for restoration programs.
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Grant, Carl D., David T. Bell, John M. Koch y William A. Loneragan. "Implications of Seedling Emergence to Site Restoration following Bauxite Mining in Western Australia". Restoration Ecology 4, n.º 2 (junio de 1996): 146–54. http://dx.doi.org/10.1111/j.1526-100x.1996.tb00115.x.

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Turner, S. R. "Seed ecology of Lepidosperma scabrum (Cyperaceae), a dryland sedge from Western Australia with physiological seed dormancy". Australian Journal of Botany 61, n.º 8 (2013): 643. http://dx.doi.org/10.1071/bt13137.

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Lepidosperma scabrum is a common understorey species currently required for urban bushland restoration, although its propagation has been highly problematic. In this context, the overall aims of the present study were to (1) document key characteristics for seed-dormancy classification; (2) assess the effectiveness of different germination-promoting treatments; and (3) quantify changes in nutlet fill, dormancy and germination following soil storage under natural and nursery conditions. Initial investigations found that naturally shed nutlets (the natural germination unit) have high seed fill and viability (>90.0%) and a small (~468 µm) capitate embryo that readily grew (>95.0%) when extracted and cultured in vitro. Intact nutlets also imbibed moisture to a similar percentage (15.0 ± 1.4%) as nicked nutlets (18.0 ± 1.8%). Fresh nutlets germinated only in response to heat shock (100°C for 10 min), which was enhanced with additional treatment with 2.89 mM gibberellic acid (13.3%), 10% v/v smoke water (16. 6%) or a combination of both (23.3%). Nutlets placed into a burial trial maintained viability for 3 years and started to germinate (19.9 ± 9.5%) in response to smoke water by the third winter season. Heat shock was also found to significantly improve germination (81.1 ± 4.2%) for soil-aged nutlets. The present study is the first report of high germination from intact nutlets of any Lepidosperma spp. and provides practical techniques for the large-scale production of plants for horticulture and restoration.
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Craig, Michael D., Mark J. Garkaklis, Giles E. St J. Hardy, Andrew H. Grigg, Carl D. Grant, Patricia A. Fleming y Richard J. Hobbs. "Ecology of the western bearded dragon (Pogona minor) in unmined forest and forest restored after bauxite mining in south-west Western Australia". Australian Journal of Zoology 55, n.º 2 (2007): 107. http://dx.doi.org/10.1071/zo07002.

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Forest areas restored after mining typically take decades, or longer, before they resemble the original vegetation community. Understanding how fauna succession varies with plant succession requires detailed knowledge of an animal’s ecology. Knowledge of an animal’s ecology can also be used to predict faunal responses to management manipulations and enable techniques to be developed that accelerate the return of fauna to restored sites. We radio-tracked western bearded dragons (Pogona minor) in a mix of unmined forest sites and sites restored after bauxite mining, in the jarrah forest of south-west Western Australia, to determine critical resources and important microhabitats for dragons. Dragons were generalists – utilising a range of microhabitats – and adaptable, adjusting their microhabitat use depending on availability. Individuals also differed significantly in their microhabitat use and did not appear to have a defined home range. We concluded that the species would rapidly recolonise restored sites and that no modifications to current restoration practices were required to accelerate their return. Prescribed burning of restored areas could negatively affect this species but the effect would be short-term (<2 years). The approach used in this study could be used to develop management prescriptions that accelerate the return of late-successional species to restored sites.
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Cuneo, Peter, Catherine A. Offord y Michelle R. Leishman. "Seed ecology of the invasive woody plant African Olive (Olea europaea subsp. cuspidata): implications for management and restoration". Australian Journal of Botany 58, n.º 5 (2010): 342. http://dx.doi.org/10.1071/bt10061.

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Knowledege of the seed ecology of invasive exotic species, including soil seedbank dynamics, is essential to understanding key factors in successful invasion and in identifying management opportunities. African Olive, Olea europaea L. subsp. cuspidata, is an exotic invasive woody plant in Hawaii, Norfolk Island and eastern Australia, and is now well established in the Cumberland Plain region of western Sydney, Australia. In the present study, the key aspects of the seed ecology of African Olive were determined for populations in western Sydney. Extracted seed germinated at a wide range of temperatures, consistent with tolerance of a wide range of climatic conditions. A seed-burial experiment indicated a slow decrease in viability down to 70.3% during the first year, followed by a rapid decline down to 14.7% in the second year. Probit analysis indicated that under field conditions, seed persistence in the soil was ~29 months (2.4 years). In situ germination was low (3.3%) and did not occur until the mechanical constriction of the endocarp was released through decomposition. The woody seed endocarp was found to be permeable to water, indicating that physical dormancy was not imposed by providing a barrier to water uptake. Within its invasive range, African Olive produces abundant seed. However, the rapid loss of viability of soil-stored seed results in a narrow window of opportunity for germination. The short persistence of seed in the soil may provide an opportunity for managers to achieve control of African Olive once mature plants are removed.
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Broadhurst, Linda, Margaret Byrne, Lyn Craven y Brendan Lepschi. "Genetic congruence with new species boundaries in the Melaleuca uncinata complex (Myrtaceae)". Australian Journal of Botany 52, n.º 6 (2004): 729. http://dx.doi.org/10.1071/bt04073.

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Uninformed management decisions have the potential to create significant problems for conservation programs. In the south-western corner of Australia where conservation initiatives are directed towards restoring large tracts of land degraded by broadscale clearing and increasing levels of dryland salinity, Melaleuca uncinata R.Br. (Myrtaceae) is a species complex of considerable interest for restoration. Although M. uncinata is morphologically uniform across most of southern mainland Australia, there is considerable variation in south-western Australia and a recent morphological evaluation has recognised 11 species. Phylogenetic patterns among populations of seven of these species were examined with nuclear RFLP loci to determine whether morphological and phylogenetic boundaries were congruent before the implementation of any broadscale revegetation programs. The phylogenetic analysis was congruent with the morphological assessment, and populations of different species, including those co-occurring at the same site, clustered according to their correct morphological assignment. Some genetic structuring associated with habitat preference was also evident within two of the species. The taxonomic resolution and knowledge of the phylogenetic relationships among the seven species will facilitate their further assessment for issues relevant to revegetation, such as provenance and local adaptation. It will also enable selection of appropriate germplasm in revegetation programs to maximise the genetic adaptation in restoration and minimise negative impact of plantings on remnant vegetation.
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Baker, Timothy, Jane Gye y Judy Christie. "19th Conference of the Society for Ecological Restoration International. 23 August–27 August 2009, Perth, Western Australia, Australia". Ecological Management & Restoration 10, n.º 3 (diciembre de 2009): 246. http://dx.doi.org/10.1111/j.1442-8903.2009.00501.x.

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Tesis sobre el tema "Restoration ecology – Western Australia"

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O'Brien, Eleanor K. "Local adaptation and genetic variation in south-western Australian forest trees : implications for restoration". University of Western Australia. School of Animal Biology, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0132.

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[Truncated abstract] Spatial structuring of genetic variation is commonly observed in plant species due to limited dispersal and local adaptation. Intraspecific genetic variation has significant implications for ecological restoration because the source of seed or plants influences patterns of gene flow, and may affect performance if there is adaptive divergence among source populations. This study assessed quantitative trait variation, local adaptation and molecular variation within three common, widespread, long-lived forest tree species from south-western Australia to understand the distribution of intraspecific genetic variation and predict the consequences of seed transfer for restoration. The geographic distribution of quantitative trait variation of jarrah Eucalyptus marginata was assessed through measurement of 15-year-old trees grown in a provenance trial. Survival of trees from the northern jarrah forest was significantly higher than that of trees from southern jarrah forest provenances, where mean annual rainfall is much higher, but stem diameter at breast height (d.b.h.) of southern jarrah forest trees was greater, implying faster growth. D.b.h. of trees from within the northern jarrah forest also exhibited a positive relationship with mean annual rainfall, with maximum d.b.h. observed in trees from provenances in the high rainfall zone. These patterns may reflect selection for faster growth under high rainfall conditions or environmentally-induced parental effects. The percentage of trees bearing buds and flowers varied among latitudinal divisions. ... Neither genetic variation within nor among populations of any species could explain variation of emergence and establishment in reciprocal transplant trials. Collectively, the findings of this study suggest structuring of genetic variation in these species at a broad, rather than a very local, scale. This is expected for widespread, long-lived species, where extensive gene flow and temporal variation are likely to favour high within, relative to among, population genetic variation. However, there is evidence that the source of seed may have a significant influence on the success of restoration of these species, whether as a result of genetic variation among populations or due to other factors affecting seed quality. These results highlight the importance of integrating studies of molecular and adaptive trait variation when seeking to understand the causes and consequences of genetic variation within plant species and contribute to the development of seed sourcing practices for improved restoration success.
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Setyawan, Dwi. "Soil development, plant colonization and landscape function analysis for disturbed lands under natural and assisted rehabilitation". University of Western Australia. School of Earth and Geographical Sciences, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0117.

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[Truncated abstract] Spontaneous plant growth and soil development occur at disturbed sites with their extent and nature being variously affected by soil fertility status, local climate and topographic conditions. Soil-plant interactions can be diverse and site-specific within a disturbed landscape. The main purpose of the present study is to evaluate soil characteristics and landscape indices in relation to natural plant growth and soil development under different conditions and for diverse materials. A comprehensive study has been carried out to evaluate spontaneous soil development and plant colonization on various regolith materials at a railway cutting near Jarrahdale bauxite mine and on various substrates comprising waste rock, weathered regolith and replaced topsoil at Scotia (Norseman, Western Australia) and Kelian (East Kalimantan, Indonesia). At Jarrahdale soil development has occurred slowly over 36 years in relation to morphological changes in surface horizons. Soils at several locations exhibit substantial changes in color, texture and structure. The slow soil development is primarily due to low biomass and litter contributions (˜1 Mg/ha) from colonizing plants (e.g. Dryandra sessilis, Eucalyptus marginata and low shrubs) on the cutting shelf and slow litter decomposition. Nutrient accumulation is up to 5 kg N/ha, and 0.5 kg/ha for P and K. Surface soil samples from Jarrahdale are generally acidic (pH < 5.1) and contain low concentrations of total soil carbon (20 g/kg) and nutrients of total nitrogen (0.73 g/kg), bicarbonate-extractable phosphorus (bic-P) (< 2 mg/kg), bic-K (37 mg/kg) and total exchangeable bases (<1.1 cmol/kg, with 24 % base saturation). Soil properties at the Scotia waste dump are mainly associated with alkaline (mean pH = 9) and saline conditions (EC1:5 = 1.01 dS/m). Exchangeable base values are high with average concentrations of exchangeable Ca of 18 cmol/kg and exchangeable Mg of 6 cmol/kg, thus these elements are not a limiting factor for plant nutrition. Patchy plant growth on the waste dump is mostly related to differences in water availability in the arid region and to salinity such that halophytes (saltbushes Maireana and Atriplex) colonize many parts of the waste dump together with some Melaleuca and Eucalyptus species
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Farrell, Claire. "Leaf-litter and microsite on seedling recruitment in an alley-planted E. sargentii and Atriplex spp. saline agricultural system". University of Western Australia. School of Plant Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0110.

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[Truncated abstract] In order to assess the sustainability of mixed plantings on saline land, this thesis examined the importance of leaf-litter trapping and microsites on recruitment in a salt affected alley-belted (tree/shrub) agricultural system in Western Australia. Located in the low rainfall region (MAR <330 mm) of the wheatbelt, the 60 ha site consists of concentric rows of Eucalyptus sargentii trees with mounded (6 - 11 cm high) 10 -15 m inter-rows of Atriplex spp. Sustainability of this system and fulfilment of productive and ameliorative functions is dependant on successful recruitment (perennials). Although the present study site was conducted on farmland in a Mediterranean-type climate, low annual rainfall and spatial arrangement of perennial shrubs and trees, allow useful comparisons to be made with naturally occurring banded semi-arid systems and vice-versa. Of key interest were leaf-litter redistribution and trapping by tree and shrub rows and whether litter-cover/microsites facilitated/interfered with seedling recruitment (establishment, growth and survival). Litter from the tree row, redistributed by prevailing winds and rain, accumulated adjacent to saltbush seeding mounds, creating a mosaic of bare and littered areas across the site (total litter 10 t/ha over 22 months). Accumulated litter was hypothesized to differentially influence seasonal soil abiotic parameters (depending on litter-cover density) including; salinity, water availability, infiltration rates, water repellency and temperature. These abiotic conditions were also hypothesized to vary between tree and shrub microsites. Biotically, recruitment at this site was also hypothesized to be determined by interactions (positive and negative) between perennial components and understorey annuals/perennial seedlings. Accumulation of litter and resultant heterogeneity was influenced by shrub morphology, microtopography, wind direction and distance from litter source, with increased litter on the leeward sides of hemispherical Atriplex undulata shrubs and shrubs closest to tree rows. ... The importance of tree/shrub microsites varied seasonally, with no influence in winter due to moderate temperatures and increased water availability. In warmer months saltbush mid-row microsites were most favourable for seedling recruitment due to moderate litter-cover; reducing salinity, temperatures and increasing infiltration; and reduced root-competition/shading by the tree row. Tree microsites also directly inhibited seedling recruitment through increased salinities and water repellency. However, trees also indirectly facilitated recruitment in adjacent areas through provision of leaf-litter. As litter-trapping and recruitment patterns at this site mirror those found in semi-arid natural and artificial systems, the results of this study provide useful insights into creating appropriate mimics of low rainfall natural banded woodland and chenopod shrublands. Saltbush seeding mounds, shrub morphology and litter were key components for litter trapping and recruitment heterogeneity at this site. In this tree/shrub alley planting, where litter quantities directly influence vegetation cover densities, future saline plantings need to consider appropriate tree/shrub row spacings and orientation for efficient resource (seeds, litter and water) capture.
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Lalor, Briony Maree. "An assessment of the recovery of the microbial community in jarrah forest soils after bauxite mining and prescription burning". University of Western Australia. School of Earth and Geographical Sciences, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0037.

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[Truncated abstract] Recovery of soil nutrients, microbial populations and carbon (C) and nitrogen (N) cycling processes are critical to the success of rehabilitation following major ecosystem disturbance. Bauxite mining represents a major ecosystem disturbance to the jarrah (Eucalyptus marginata) forest in the south-west of Western Australia. Mining has created a mosaic of mined areas in various stages of succession surrounded by non-mined forest areas. Initial site preparations within rehabilitation areas such as contour ripping alter soil structure (creation of mound and furrows) and over time also influence the distribution of vegetation and litter. Current performance criteria developed by industry, government and other stakeholders have determined that before post-bauxite mined areas of jarrah forest can be integrated back into normal forest management practises they should be functional and demonstrate resilience to normal forest disturbances such as fire. Furthermore, resilience should be of a manner comparable to non-mined analogue forest sites. Currently little is known of the resilience of microbial communities and C and N cycling in rehabilitation sites to normal forest disturbances such as prescription burning. As such, before rehabilitated jarrah forests can be successfully integrated into broad scale forest management regimes, a more thorough knowledge of the potential impacts of burning practises on the soil microbial community and C and N cycling processes in these systems is required. ... While there are similar rates of C and N cycling the underlying microbial community structure was distinctly different; implying a high degree of functional redundancy with respect to C and N cycling. Differences in the C and N cycling and structure of the microbial communities were likely to be due to differences in soil environmental conditions (i.e. soil alkalinity/acidity, soil moisture) and C substrate availability which influence the physiological status of the microbial community and in turn are related to successional age of the forests. Results also suggest that the measurement of CLPP can be a useful approach for assessment of changes in the functional ability of microbial communities. However, the interpretation of how well these rehabilitation forests have recovered heterotrophic abilities was greatly affected by the methodological approach used (e.g. MicroRespTM or Degens and Harris, 1997). Importantly, results from Chapter 4 and 5 suggested that the effects of a moderate prescription fire on C and N processes, CLPP and microbial community structure of 18 year old rehabilitation forests are likely to be short-lived (< 2 years). Furthermore, the effects of the moderate spring prescription fire were not large enough to decouple C and N cycling processes over the short-term (< 1 years) which suggests that by 18 years of age rehabilitation forests demonstrate comparable functional resilience to a moderate prescription burn.
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Szota, Christopher. "Root morphology, photosynthesis, water relations and development of jarrah (Eucalyptus marginata) in response to soil constraints at restores bauxite mines in south-western Australia". University of Western Australia. School of Plant Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0058.

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Bauxite mining is a major activity in the jarrah (Eucalyptus marginata Donn ex Sm.) forest of south-western Australia. After mining, poor tree growth can occur in some areas. This thesis aimed to determine whether soil constraints, including reduced depth and compaction, were responsible for poor tree growth at low-quality restored bauxite mines. In particular, this study determined the response of jarrah root morphology, leaf-scale physiology and growth/development to soil constraints at two contrasting (low-quality and high-quality) restored bauxite-mine sites. Jarrah root excavations at a low-quality restored site revealed that deep-ripping equipment failed to penetrate the cemented lateritic subsoil, causing coarse roots to be restricted to the top 0.5 m of the soil profile, resulting in fewer and smaller jarrah trees. An adjacent area within the same mine pit (high-quality site) had a kaolinitic clay subsoil, which coarse roots were able to penetrate to the average ripping depth of 1.5 m. Impenetrable subsoil prevented development of taproots at the low-quality site, with trees instead producing multiple lateral and sinker roots. Trees in riplines, made by deep-ripping, at the high-quality site accessed the subsoil via a major taproot, while those on crests developed large lateral and sinker roots. Bauxite mining is a major activity in the jarrah (Eucalyptus marginata Donn ex Sm.) forest of south-western Australia. After mining, poor tree growth can occur in some areas. This thesis aimed to determine whether soil constraints, including reduced depth and compaction, were responsible for poor tree growth at low-quality restored bauxite mines. In particular, this study determined the response of jarrah root morphology, leaf-scale physiology and growth/development to soil constraints at two contrasting (low-quality and high-quality) restored bauxite-mine sites. Jarrah root excavations at a low-quality restored site revealed that deep-ripping equipment failed to penetrate the cemented lateritic subsoil, causing coarse roots to be restricted to the top 0.5 m of the soil profile, resulting in fewer and smaller jarrah trees. An adjacent area within the same mine pit (high-quality site) had a kaolinitic clay subsoil, which coarse roots were able to penetrate to the average ripping depth of 1.5 m. Impenetrable subsoil prevented development of taproots at the low-quality site, with trees instead producing multiple lateral and sinker roots. Trees in riplines, made by deep-ripping, at the high-quality site accessed the subsoil via a major taproot, while those on crests developed large lateral and sinker roots.
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Commander, Lucy. "Seed biology and rehabilitation in the arid zone : a study in the Shark Bay world heritage area, Western Australia". University of Western Australia. School of Plant Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0091.

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Research into seed biology and restoration ecology of areas disturbed by mining is crucial to their revegetation. Shark Bay Salt, a solar salt facility in the Shark Bay World Heritage Area in Western Australia has several areas of disturbance as a result of 'soil borrowing'. Soil from these areas termed 'borrow pits' was used to create infrastructure such as the roads and embankments surrounding the evaporation ponds. Many of the pits contain little to no vegetation after >10 years since disturbance ceased, hence research into their restoration is now essential. A vegetation survey at the site established the key species in the undisturbed vegetation, and investigated the vegetation in borrow pits subject to natural migration and topsoil replacement. The vegetation communities in the borrow pits were vastly different to those in the undisturbed vegetation, highlighting the need for research into revegetation. An investigation into the use of 'borrowed' topsoil on a small scale showed that seedling recruitment from 'borrowed' topsoil was generally similar in the donor site (natural vegetation) and the borrow pits. Due to the absence of topsoil for further revegetation, it was necessary to understand seed germination and dormancy characteristics to establish seed pre-treatments prior to seed broadcasting and seedling (greenstock) planting. An investigation into seed germination and dormancy characteristics of 18 common species revealed that most species germinated equally well at 26/13oC and 33/18oC, however seven species had improved performance at 26/13oC. Untreated seeds of seven species exhibited high germination. Seeds of two species had low imbibition, which increased with hot-water treatment, and hence require scarification for germination. Germination of seeds of three species substantially increased with gibberellic acid (GA3), smoke water (SW) and karrikinolide (KAR1, a butenolide isolated from smoke). Seeds of the remaining six species had low germination regardless of treatment. As a result, species were classified as likely to be non-dormant (44%), physiologically dormant (44%) or physically dormant (11%). Physiological dormancy of three species was at least partly alleviated by dry afterripening, whereby moisture content of seeds was adjusted to 13% or 50% equilibrium relative humidity and seeds were stored at 30oC or 45oC for several months. All iv after-ripening conditions increased germination percentage and rate of two species with one only germinating when treated with GA3 or KAR1. The germination of the third species was dependent on after-ripening temperature and seed moisture content.
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Bleby, Timothy Michael. "Water use, ecophysiology and hydraulic architecture of Eucalyptus marginata (jarrah) growing on mine rehabilitation sites in the jarrah forest of south-western Australia". University of Western Australia. School of Plant Biology, 2003. http://theses.library.uwa.edu.au/adt-WU2004.0004.

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[Truncated abstract. Please see the pdf format for the complete text. Also, formulae and special characters can only be approximated here. Please see the pdf version for an accurate reproduction.] This thesis examines the water use, ecophysiology and hydraulic architecture of Eucalyptus marginata (jarrah) growing on bauxite mine rehabilitation sites in the jarrah forest of south-western Australia. The principal objective was to characterise the key environment and plant-based influences on tree water use, and to better understand the dynamics of water use over a range of spatial and temporal scales in this drought-prone ecosystem. A novel sap flow measurement system (based on the use of the heat pulse method) was developed so that a large number of trees could be monitored concurrently in the field. A validation experiment using potted jarrah saplings showed that rates of sap flow (transpiration) obtained using this system agreed with those obtained gravimetrically. Notably, diurnal patterns of transpiration were measured accurately and with precision using the newly developed heat ratio method. Field studies showed that water stress and water use by jarrah saplings on rehabilitation sites were strongly seasonal: being greatest in summer when it was warm and dry, and least in winter when it was cool and wet. At different times, water use was influenced by soil water availability, vapour pressure deficit (VPD) and plant hydraulic conductance. In some areas, there was evidence of a rapid decline in transpiration in response to dry soil conditions. At the end of summer, most saplings on rehabilitation sites were not water stressed, whereas water status in the forest was poor for small saplings but improved with increasing size. It has been recognised that mature jarrah trees avoid drought by having deep root systems, however, it appears that saplings on rehabilitation sites may have not yet developed functional deep roots, and as such, they may be heavily reliant on moisture stored in surface soil horizons. Simple predictive models of tree water use revealed that stand water use was 74 % of annual rainfall at a high density (leaf area index, LAI = 3.1), high rainfall (1200 mm yr-1) site, and 12 % of rainfall at a low density (LAI = 0.4), low rainfall (600 mm yr-1) site, and that water use increased with stand growth. A controlled field experiment confirmed that: (1) sapling transpiration was restricted as root-zone water availability declined, irrespective of VPD; (2) transpiration was correlated with VPD when water was abundant; and (3) transpiration was limited by soil-to-leaf hydraulic conductance when water was abundant and VPD was high (> 2 kPa). Specifically, transpiration was regulated by stomatal conductance. Large stomatal apertures could sustain high transpiration rates, but stomata were sensitive to hydraulic perturbations caused by soil water deficits and/or high evaporative demand. No other physiological mechanisms conferred immediate resistance to drought. Empirical observations were agreeably linked with a current theory suggesting that stomata regulate transpiration and plant water potential in order to prevent hydraulic dysfunction following a reduction in soil-to-leaf hydraulic conductance. Moreover, it was clear that plant hydraulic capacity determined the pattern and extent of stomatal regulation. Differences in hydraulic capacity across a gradient in water availability were a reflection of differences in root-to-leaf hydraulic conductance, and were possibly related to differences in xylem structure. Saplings on rehabilitation sites had greater hydraulic conductance (by 50 %) and greater leaf-specific rates of transpiration at the high rainfall site (1.5 kg m-2 day1) than at the low rainfall site (0.8 kg m-2 day1) under near optimal conditions. Also, rehabilitation-grown saplings had significantly greater leaf area, leaf area to sapwood area ratios and hydraulic conductance (by 30-50 %) compared to forest-grown saplings, a strong indication that soils in rehabilitation sites contained more water than soils in the forest. Results suggested that: (1) the hydraulic structure and function of saplings growing under the same climatic conditions was determined by soil water availability; (2) drought reduced stomatal conductance and transpiration by reducing whole-tree hydraulic conductance; and (3) saplings growing on open rehabilitation sites utilised more abundant water, light and nutrients than saplings growing in the forest understorey. These findings support a paradigm that trees evolve hydraulic equipment and physiological characteristics suited to the most efficient use of water from a particular spatial and temporal niche in the soil environment.
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Grigg, Alasdair M. "An ecophysiological approach to determine problems associated with mine-site rehabilitation : a case study in the Great Sandy Desert, north-western Australia". University of Western Australia. School of Plant Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0118.

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[Truncated abstract] Establishment of vegetation and ecosystem functioning is central to the mitigation of environmental impacts associated with mining operations. This study investigated the ecophysiological functioning of mature plants in natural vegetation and applied this knowledge to diagnose problems affecting plant health and causes of poor plant cover at a mine-rehabilitation site. Ecophysiological parameters, including plant water relations and mineral nutrition, were studied in conjunction with soil physical, hydraulic and chemical properties. The natural ecosystem at the study location in the Great Sandy Desert is characterised by sand dunes and interdunes with distinct plant communities on each. One of the most notable features of the vegetation is the presence of large Corymbia chippendalei trees high on the dunes and relatively small scattered shrubs in the interdunes. Triodia grasses (spinifex), dominate the vegetation in both habitats but different species occur in each; T. schinzii is restricted entirely to the dunes, and T. basedowii occurs only in the interdunes. It was hypothesised that the deep sandy dunes afford greater water availability but lower nutrient supply to plants in this habitat compared with those occurring in the lower landscape position of the interdunes. Water-relations parameters (leaf water potentials, stomatal conductance, d13C) revealed that dune plants, particularly woody species, displayed higher water status and water use than closely related and often congeneric plants in the interdunes. Nutrient concentrations in soils were significantly higher in the interdunes, but concentrations in foliage were similar for related species between habitats. It is concluded that the dunes provide a greater store of accessible water than the soil profile in the interdunes. ... Following an experimental wetting pulse equivalent to a summer cyclone event, A. ancistrocarpa plants displayed significant increases in stomatal conductance, leaf water potential and sap velocity in lateral roots within three days of irrigation at the natural site and two days at the rehabilitation site. Secondary sinker roots originating from distal sections of lateral roots were evidently supplying water to maintain hydraulic function in laterals, thus enabling a fast pulse response. This was accentuated at the rehabilitation site where roots were confined closer to the surface. These results indicate that plants at the rehabilitation site are more dependent on small pulses of water and have less access to deep reserves than plants at the natural site. It is concluded that high runoff losses and insufficient soil depth are major factors contributing to plant water stress, and combined with the direct impacts of erosion, are largely responsible for plant death and ultimately poor plant cover. These issues can be alleviated if cover soil depth is increased to more than 0.5 m and slope angles are reduced to <12o. This study demonstrates the value of an ecophysiological approach for diagnosing problems affecting plant establishment at mine-rehabilitation sites. Furthermore, it has provided recommendations that will improve the rehabilitation strategy and lead to the development of a well vegetated, resilient ecosystem on a stable and non-polluting land form.
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Twomey, Luke J. "The phytoplankton ecology of Wilson Inlet, Western Australia". Curtin University of Technology, School of Environmental Biology, 2000. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=9801.

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Ireland, Carolyn. "Sustaining the western myall woodlands : ecology and mangement". Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phi65.pdf.

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Bibliography: leaves 227-244. This study is conceived to address various aspects of western myall (Acacia papyrocarpa Benth) recruitment, lifespan, distribution and the effects of major vertebrates on the species' ecology over the major part of its range in South Australia. A study of the population dynamics of the species is done to assess the adequacy of net recruitment. Population structure is examined across the woodlands. The new concept of "fossil paddocks" is adopted to investigate the historical impact of introduced herbivores on the landscape.
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Libros sobre el tema "Restoration ecology – Western Australia"

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International Conference on the Remediation and Management of Degraded Lands (2000 Fremantle, Western Australia). Proceedings of Remade Lands 2000, International Conference on the Remediation and Management of Degraded Lands, 30 November - 2 December 2000, Fremantle, Western Australia. Editado por Brion A, Bell R. W, International Union of Soil Science. y Murdoch University. Institute for Environmental Science. Canning Bridge: Promaco Conventions, 2000.

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Plant life of Western Australia. Kenthurst, NSW: Kangaroo Press, 1990.

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Johnstone, R. E. Mangroves and mangrove birds of Western Australia. Perth, W.A: Western Australian Museum, 1990.

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Wells, Fred E. Sea slugs of Western Australia. Perth, W.A: Western Australian Museum, 2000.

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Wells, Fred E. Sea slugs of Western Australia. Perth, W.A: Western Australian Museum, 2000.

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Strelein, G. J. Site classification in the southern jarrah forest of Western Australia. Como, W.A: Dept. of Conservation and Land Management, 1988.

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Mitchell, A. A. Arid shrubland plants of Western Australia. 2a ed. Nedlands, W.A: University of Western Australia Press in association with the Dept. of Agriculture, Western Australia, 1994.

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Mitchell, A. A. Arid shrubland plants of Western Australia. Nedlands, W.A: University of Western Australia Press with the Western Australian Dept. of Agriculture, 1988.

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Monsen, Stephen B. Restoring western ranges and wildlands. Fort Collins, CO: United States Dept. of Agriculture, Forest Service, Rocky Mountain Research Station, 2004.

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Simpson, Christopher J. Ecology of scleractinian corals in the Dampier Archipelago, Western Australia. Perth, W.A: Environmental Protection Authority, 1988.

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Capítulos de libros sobre el tema "Restoration ecology – Western Australia"

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Statton, John, Kingsley W. Dixon, Andrew D. Irving, Emma L. Jackson, Gary A. Kendrick, Robert J. Orth y Elizabeth A. Sinclair. "Decline and Restoration Ecology of Australian Seagrasses". En Seagrasses of Australia, 665–704. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-71354-0_20.

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Cole, M. M. "The vegetation of the greenstone belts of Western Australia". En The Ecology of Areas with Serpentinized Rocks, 343–73. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-3722-5_14.

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Das, Bhabani S., Priyabrata Santra, Rohit Ranjan, Hitesh B. Vasava, Rabindra Nath Samal y Ajit K. Pattnaik. "Assessment of Runoff and Sediment Yield from Selected Watersheds in the Western Catchment of the Chilika Lagoon". En Ecology, Conservation, and Restoration of Chilika Lagoon, India, 133–64. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-33424-6_7.

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Ruiz-Avila, R. J. y V. V. Klemm. "Management of Hydrocotyle ranunculoides L.f., an aquatic invasive weed of urban waterways in Western Australia". En Management and Ecology of Freshwater Plants, 187–90. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-5782-7_29.

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Cox, Shaphan y Christina Birdsall-Jones. "From Activists to Illegally Occupying Land: Aboriginal Resistance as Moral Ecology in Perth, Western Australia". En Moral Ecologies, 83–97. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-06112-8_4.

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Kunkel, Kyran E. "Ecology, conservation, and restoration of large carnivores in western North America". En Mammal Community Dynamics, 250–95. Cambridge University Press, 2003. http://dx.doi.org/10.1017/cbo9780511615757.009.

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Bell, David T. "Seed-related Autecology in Restoration of Mined Jarrah Forest in Western Australia". En The Reconstruction of Disturbed Arid Lands, 5–33. Routledge, 2019. http://dx.doi.org/10.4324/9780429314216-2.

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"Pacific Salmon: Ecology and Management of Western Alaska’s Populations". En Pacific Salmon: Ecology and Management of Western Alaska’s Populations, editado por Susan Hanna. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874110.ch59.

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<em>Abstract.</em>—The Arctic-Yukon-Kuskokwim (AYK) Salmon Research and Restoration Program explicitly recognizes the integration of human dimensions with salmon ecosystems. This paper addresses the collaborative management approach to integration by summarizing how collaborative processes work and how they influence management performance. Collaborative fishery management includes stakeholders in a number of management functions such as data collection, research, planning, design, decision-making, monitoring, evaluation, and enforcement. This approach is included in the general category of “co-management,” which refers to the sharing of authority and responsibility among government and stakeholders. Co-management is a process, rather than a tool, of management. The direct involvement of stakeholders in the planning and control of their fisheries offers the potential of improving the performance of fishery management in promoting sustainability. Realizing the potential depends on the extent to which key co-management principles are addressed. These principles relate to three management components: background conditions in the fishery, management structure, and management operations. Background conditions that affect the performance of co-management include uncertainty, history, and context. Elements of fishery structure relating to co-management performance include boundaries, scale, representation, and participation. Fishery management operations influence co-management performance through stability and flexibility, cost effectiveness, and equity. The principles underlie co-management performance through the effect they have on transaction costs and incentives. Columbia River salmon recovery provides a good example of the influence of transaction costs and uncertainty on collaborative management and resource recovery. The complexity of Columbia River Basin co-management includes scale, fragmentation, scientific uncertainty, and legacy. These variables lead to co-management research suggestions for the AYK Salmon Research and Restoration Program.
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"Pacific Salmon: Ecology and Management of Western Alaska’s Populations". En Pacific Salmon: Ecology and Management of Western Alaska’s Populations, editado por Fred Whoriskey. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874110.ch50.

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<em>Abstract.</em>—The Atlantic salmon <em>Salmo salar </em>in North America is much depleted. Present population abundance may be only about 4% of that at the time of European colonization, and almost all populations in the southern third of North America are at risk of biological extinction. Anthropogenic and natural factors have contributed to this situation. This paper reviews the biology of Atlantic salmon, documents current population status and management in North America, and identifies challenges to restoration. Atlantic salmon migrate from home rivers within the USA or Canada to ocean feeding areas in waters off the coast of Greenland where they mix with conspecifics from Europe. Exploitation during this migration and in interceptory fisheries in home waters posed a severe challenge to conservation of spawning populations. To address the impacts of the Greenland fishery, the North Atlantic Salmon Conservation Organization (NASCO), an international body with members from all Atlantic salmon producing countries, was established to set fishing quotas in the Atlantic Ocean and to pressure governments not respecting the quotas. In Canada, coastal commercial fisheries were also phased out to favor the more lucrative recreational angling industry. To provide incentives for reductions in commercial harvests, at least one wild salmon conservation organization initially supported salmon farming, which could provide commercial markets with a cheap source of fresh salmon. The phenomenal success of this industry helped shut down the interceptory commercial fisheries; however, its potential impacts on wild Atlantic salmon were not anticipated and some remain problematic. At present, adult salmon returns in North America remain near historic lows, and below conservation requirements. However, some rivers are producing surpluses, recreational fishing continues, and the key management goal is rebuilding North American returns. Live-release angling has been employed in many jurisdictions where harvest fisheries would pose conservation risks. While the practice has helped address the risks, a debate has been incited about the morality of angling should fish feel pain and show “awareness.” With traditional fisheries management options failing to bring relief, rebounds in wild Atlantic salmon populations will depend on upturns in marine survival, ecosystem repairs, restoration of lost salmon production potential, and innovative interventions.
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"Pacific Salmon: Ecology and Management of Western Alaska’s Populations". En Pacific Salmon: Ecology and Management of Western Alaska’s Populations, editado por James A. Lichatowich y Richard N. Williams. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874110.ch46.

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<em>Abstract.</em>—The Pacific Northwest states of Oregon, Washington, California, and Idaho are engaged in a massive effort to restore depleted populations of Pacific salmon <em>Oncorhynchus </em>spp. The region’s largest watershed, the Columbia Basin, is the focus of what has been called the world’s largest attempt at ecosystem restoration. After 26 years of implementation, the failure of the program to achieve its modest recovery goal was the result, in part, of a failure to incorporate the latest science into the program. The fundamental assumptions and principles that guide the selection of recovery tasks and their implementation were not based on the latest scientific understanding of the salmon production system. Three impediments to the incorporation of science into management and recovery programs are identified: an inadequate conceptual foundation, fragmented institutional structures, and political interference. Each impediment is illustrated and discussed using case histories from the Columbia River.
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