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Myers, Helen, Leonie Segal, Derrick Lopez, Ian W. Li, and David B. Preen. "Impact of family-friendly prison policies on health, justice and child protection outcomes for incarcerated mothers and their dependent children: a cohort study protocol." BMJ Open 7, no. 8 (August 2017): e016302. http://dx.doi.org/10.1136/bmjopen-2017-016302.
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IntroductionFemale imprisonment has numerous health and social sequelae for both women prisoners and their children. Examples of comprehensive family-friendly prison policies that seek to improve the health and social functioning of women prisoners and their children exist but have not been evaluated. This study will determine the impact of exposure to a family-friendly prison environment on health, child protection and justice outcomes for incarcerated mothers and their dependent children.Methods and analysisA longitudinal retrospective cohort design will be used to compare outcomes for mothers incarcerated at Boronia Pre-release Centre, a women’s prison with a dedicated family-friendly environment, and their dependent children, with outcomes for mothers incarcerated at other prisons in Western Australia (that do not offer this environment) and their dependent children. Routinely collected administrative data from 1985 to 2013 will be used to determine child and mother outcomes such as hospital admissions, emergency department presentations, custodial sentences, community service orders and placement in out-of home care. The sample consists of all children born in Western Australia between 1 January 1985 and 31 December 2011 who had a mother in a West Australian prison between 1990 and 2012 and their mothers. Children are included if they were alive and aged less than 18 years at the time of their mother’s incarceration. The sample comprises an exposed group of 665 women incarcerated at Boronia and their 1714 dependent children and a non-exposed comparison sample of 2976 women incarcerated at other West Australian prisons and their 7186 dependent children, creating a total study sample of 3641 women and 8900 children.Ethics and disseminationThis project received ethics approval from the Western Australian Department of Health Human Research Ethics Committee, the Western Australian Aboriginal Health Ethics Committee and the University of Western Australia Human Research Ethics Committee.
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Riley, Thomas, Su Chen Lim, Peter Moono, Sicilia Perumalsamy, and Niki Foster. "High prevalence of Clostridium difficile in the Western Australian environment." Infection, Disease & Health 23 (November 2018): S20. http://dx.doi.org/10.1016/j.idh.2018.09.079.
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Pritchard, D. L., N. Penney, M. J. McLaughlin, H. Rigby, and K. Schwarz. "Land application of sewage sludge (biosolids) in Australia: risks to the environment and food crops." Water Science and Technology 62, no. 1 (July 1, 2010): 48–57. http://dx.doi.org/10.2166/wst.2010.274.
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Australia is a large exporter of agricultural products, with producers responsible for a range of quality assurance programs to ensure that food crops are free from various contaminants of detriment to human health. Large volumes of treated sewage sludge (biosolids), although low by world standards, are increasingly being recycled to land, primarily to replace plant nutrients and to improve soil properties; they are used in agriculture, forestry, and composted. The Australian National Biosolids Research Program (NBRP) has linked researchers to a collective goal to investigate nutrients and benchmark safe concentrations of metals nationally using a common methodology, with various other research programs conducted in a number of states specific to regional problems and priorities. The use of biosolids in Australia is strictly regulated by state guidelines, some of which are under review following recent research outcomes. Communication and research between the water industry, regulators and researchers specific to the regulation of biosolids is further enhanced by the Australian and New Zealand Biosolids Partnership (ANZBP). This paper summarises the major issues and constraints related to biosolids use in Australia using specific case examples from Western Australia, a member of the Australian NBRP, and highlights several research projects conducted over the last decade to ensure that biosolids are used beneficially and safely in the environment. Attention is given to research relating to plant nutrient uptake, particularly nitrogen and phosphorus (including that of reduced phosphorus uptake in alum sludge-amended soil); the risk of heavy metal uptake by plants, specifically cadmium, copper and zinc; the risk of pathogen contamination in soil and grain products; change to soil pH (particularly following lime-amended biosolids); and the monitoring of faecal contamination by biosolids in waterbodies using DNA techniques. Examples of products that are currently produced in Western Australia from sewage sludge include mesophilic anaerobically digested and dewatered biosolids cake, lime-amended biosolids, alum sludge and compost.
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Colic-Peisker, Val. "Croatians in Western Australia: migration, language and class." Journal of Sociology 38, no. 2 (June 2002): 149–66. http://dx.doi.org/10.1177/144078302128756552.
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This paper explores the migration experience of two cohorts of Croatian migrants in Australia focusing on the fact that they are non-English speaking background (NESB) migrants. Central attention is given to the intersection of class and ‘living in another language’ (being NESB in Australia). The first cohort migrated in the 1960s and is predominantly working class; the second migrated in the late 1980s and is predominantly professional. It is argued that living in an English speaking environment affects Croatian migrants in practical, cultural, identity and status terms. It determines their life chances, employment prospects and the feeling of belonging to the Australian community. However, the two groups of migrants, being from different socioeconomic backgrounds, are affected in different ways.
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Vlachos, Alexandra. "Fortress Farming in Western Australia? The Problematic History of Separating Native Wildlife from Agricultural Land through the State Barrier Fence." Global Environment 13, no. 2 (June 15, 2020): 368–403. http://dx.doi.org/10.3197/ge.2020.130206.
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The Western Australia (WA) State Barrier Fence stretches 2,023 miles (3,256 kilometres) and divides Australia's largest state. The original 'Rabbit Proof Fence' fence was built from 1901–1907 to stop the westbound expansion of rabbits into the existing and potential agricultural zone of Western Australia. Starting as a seemingly straightforward, albeit costly, solution to protect what was considered a productive landscape, the fence failed to keep out the rabbits. It was subsequently amended, upgraded, re-named and used to serve different purposes: as Vermin Fence and State Barrier Fence (unofficially also Emu Fence or Dog Fence) the fence was designed to exclude native Australian animals such as emus, kangaroos and dingoes. In the Australian 'boom and bust' environment, characterised by extreme temperatures and unpredictable rainfall, interrupting species movement has severe negative impacts on biodiversity – an issue aggravated by the fact that Australia leads in global extinction rates (Woinarski, Burbidge and Harrison, 2015). The twentieth century history of the fence demonstrates the agrarian settlers' struggle with the novelty and otherness of Western Australia's ecological conditions – and severe lack of knowledge thereof. While the strenuous construction, expensive maintenance and doubtful performance of the fence provided useful and early environmental lessons, they seem largely forgotten in contemporary Australia. The WA government recently commenced a controversial $11 million project to extend the State Barrier Fence for another 660 kilometres to reach the Esperance coast, targeting dingoes, emus and kangaroos – once again jeopardising habitat connectivity. This paper examines the environmental history, purposes and impacts of the State Barrier fence, critically discusses the problems associated with European farming and pastoralism in WA, and touches on alternative land-use perspectives and futures.
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Chessman, Bruce C., Nina Bate, Peter A. Gell, and Peter Newall. "A diatom species index for bioassessment of Australian rivers." Marine and Freshwater Research 58, no. 6 (2007): 542. http://dx.doi.org/10.1071/mf06220.
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The Diatom Index for Australian Rivers (DIAR), originally developed at the genus level, was reformulated at the species level with data from diatom sampling of rivers in the Australian Capital Territory, New South Wales, Queensland, South Australia and Victoria. The resulting Diatom Species Index for Australian Rivers (DSIAR) was significantly correlated with the ARCE (Assessment of River Condition, Environment) index developed in the Australian National Land and Water Resources Audit (NLWRA), and with nine of the ARCE’s constituent indices and sub-indices, across 395 river reaches in south-eastern Australia. These correlations were generally stronger than those shown by the biological index that was used to assess river condition in the NLWRA, the ARCB (Assessment of River Condition, Biota) index based on macroinvertebrates and the Australian River Assessment System (AUSRIVAS). At a finer spatial scale, DSIAR was strongly and significantly correlated with measures of catchment urbanisation for streams in the eastern suburbs of Melbourne, Victoria. DSIAR scores across south-eastern Australia bore little relationship to the latitude, longitude or altitude of sampling sites, suggesting that DSIAR is not greatly affected by macro-geographical position. In addition, DSIAR scores did not vary greatly among small-scale hydraulic environments within a site. DSIAR appears to have potential as a broad-scale indicator of human influences on Australian rivers, especially the effects of agricultural and urban land use, and also for impact studies at a local scale. Further evaluation is warranted to test the sensitivity of the index to natural variables such as catchment geology, and to assess its performance in northern, western and inland Australia.
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Rock, Daniel Joseph, and Joachim Franz Hallmayer. "The Seasonal Risk for Deliberate Self-Harm." Crisis 29, no. 4 (July 2008): 191–201. http://dx.doi.org/10.1027/0227-5910.29.4.191.
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Groups at seasonal risk for deliberate self-harm (DSH) vary according to their geographic location. It is unknown, however, if seasonal risk factors for DSH are associated with place of birth or place of residence as these are confounded in all studies to date. In order to disaggregate place of birth from place of residence we examined general and seasonal risk factors for DSH in three different population birth groups living in Western Australia: Australian Aborigines, Australian born non-Aborigines, and UK migrants. We found Aborigines are at much higher general risk for DSH than non-Aborigines, but are not at seasonal risk, whereas non-Aboriginal Australians and UK migrants are. For UK migrants, this is only found for females. For all groups at seasonal risk this peaks during the austral (southern hemisphere) spring/summer. Furthermore, non-Aboriginal Australians and UK migrants show a consistent pattern of increased case fatality with increasing age. In contrast, case fatality does not increase with age among Australian Aborigines. Overall, despite living in the same environment, the three birth groups show different patterns of seasonal risk for DSH. In particular, the sex difference found between UK migrants and non-Aboriginal Australian birth groups suggests that predisposition toward seasonal risk for DSH is established early in life, but when present this is expressed according to local conditions.
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Lowther, A. D., R. G. Harcourt, and S. D. Goldsworthy. "Regional variation in trophic ecology of adult female Australian sea lions inferred from stable isotopes in whiskers." Wildlife Research 40, no. 4 (2013): 303. http://dx.doi.org/10.1071/wr12181.
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Context The primary selective forces responsible for shaping life-history traits come from the physical and biological environment in which a species resides. Consequently, the limits of a species range may provide a useful measure of adaptive potential to environmental change. The proximity of foraging grounds to terrestrial nursing habitat constrains central-place foragers such as otariid seals in selecting breeding locations. The Australian sea lion (Neophoca cinerea) is an endangered otariid endemic to Australia, whose northern-range extent occurs at a temperate–tropical transition zone on the western coast of Western Australia (WA). Aims Currently, there is a complete absence of data on the foraging ecology of Australian sea lions in WA. We sought to address this critical knowledge gap and provide data on the foraging ecology of adult female Australian sea lions at three isolated breeding colonies in western WA. Methods We used stable-isotope ratios of carbon (δ13C) and nitrogen (δ15N) in the whiskers of pups as proxies to characterise feeding behaviour of 10–28% of all adult female Australian sea lions at each colony. We then compared these geographic data to (1) conspecifics at similar latitude in South Australia (SA) and (2) isotopic data collated from other studies on seabirds that inhabit the region, to place foraging behaviour of adult female Australian sea lions into context. Key results At the southernmost colonies in WA, individual animals were members of one of two distinct isotopic clusters that could be described by differences in δ15N and δ13C values. Individuals at the northernmost colony displayed δ15N values similar to those of seabirds in the same region. Across the study, isotope ratios of adult female Australian sea lions in western WA were between 3‰ and 5‰ lower than those observed at a colony at similar latitude in SA. Conclusions Gross differences in the physical oceanography between WA and SA may in part explain the differences in isotope ratios of individuals between the regions, with lower δ15N and δ13C values in WA probably reflecting the relatively depauperate conditions of the Leeuwin Current. Implications Potential regional differences in trophic structure should be considered when developing appropriate management plans for Australian sea lions and regional variation in the diet of Australian sea lion warrants further investigation.
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Morgan, Raphael, Emily Gifford, Annette Jacobs, and Kate Swain. "Western Australian marine oil pollution risk assessment: identification of protection priorities." APPEA Journal 59, no. 2 (2019): 657. http://dx.doi.org/10.1071/aj18203.
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The Western Australian Department of Transport (DoT) is the hazard management agency (HMA) for marine oil pollution in Western Australia (WA). DoT initiated the WA marine oil pollution risk assessment (WAMOPRA), a detailed assessment of oil spill risk in Western Australian State waters. It comprised two components. The first component evaluated protection priorities of the receiving environment to assess potential consequences of marine oil pollution. The second component assessed the likelihood, size, location and type of marine oil pollution. Protection priority outputs from component one were modelled with spill risk from component two, to give an overall risk profile for the State. For management purposes, State waters were divided into seven zones and smaller shoreline cells (~10 km × ~20 km). Geospatial datasets representing the various receptors identified were collated and grouped into the following five categories: Protected fauna; Protection areas; Cultural heritage; Economic; and Social, amenity and recreation. Using a multi-criteria analysis approach, the spatial data layers for each receptor identified were assigned a ranking from one (very low priority) to five (very high priority) for protection. The effects of both floating and dissolved hydrocarbons were ranked. These rankings were then used to produce a map showing very low to very high priorities of the shoreline cells for each category. The outcome of this project is the largest single assessment of protection priorities (~13000 km of coastline), undertaken across a highly variable coastline, using a standard and repeatable approach that can be applied across Australia.
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Bills, Kym. "Building a world-class Australian decommissioning industry." APPEA Journal 58, no. 2 (2018): 690. http://dx.doi.org/10.1071/aj17154.
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Collaboration in decommissioning offshore infrastructure could save both industry and taxpayers billions of dollars and facilitate new industries and exports for Australia, especially in the Asia-Pacific region. At the end of the liquefied natural gas (LNG) plant construction boom, Australia must not miss out on this major new opportunity. The 2017 bid for Commonwealth funding to establish a Decommissioning Offshore Infrastructure Cooperative Research Centre (DOI-CRC) involved more than 30 participants and many other collaborators. High-level commitments were made by Chevron, Woodside, Shell, BHP, ExxonMobil, Quadrant, The University of Western Australia, Curtin University, the University of New South Wales, Deakin University, Australian Maritime College, CSIRO and Australian Institute of Marine Science. A Perth-based DOI-CRC was supported by National Energy Resources Australia, National Offshore Petroleum Safety and Environmental Management Authority and other Australian Government bodies and by the Western Australian Government and its Chief Scientist and agencies but did not receive sufficient support from the CRC Advisory Committee. Meeting decommissioning challenges in the North West Shelf, Bass Strait and the Northern Territory in a timely, robust, scientific, efficient and cost-effective manner that contributes to a sustainable marine environment should draw upon and augment international best practice with local capability and expertise. Good science and innovative engineering are needed to support regulatory approval of options such as ‘rigs to reefs’ and commercial opportunities such as in waste management and expanded fishing and tourism. APPEA and operators wish to maintain DOI-CRC’s momentum and learn from UK research arrangements through funding marine science projects. But we must be much broader if we are to build a sustainable world-class Australian decommissioning industry. In particular, we need to work more closely with state and federal regulators and policymakers and undertake more engineering science research and innovation.
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Powell, Devin. "Environment: Warmer waters aid some corals: Western Australian reefs faring better than eastern." Science News 181, no. 5 (March 1, 2012): 15. http://dx.doi.org/10.1002/scin.5591810517.
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Weller, Evan, Ming Feng, Harry Hendon, Jian Ma, Shang-Ping Xie, and Nick Caputi. "Interannual Variations of Wind Regimes off the Subtropical Western Australia Coast during Austral Winter and Spring." Journal of Climate 25, no. 16 (August 15, 2012): 5587–99. http://dx.doi.org/10.1175/jcli-d-11-00324.1.
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Abstract Off the Western Australia coast, interannual variations of wind regime during the austral winter and spring are significantly correlated with the Indian Ocean dipole (IOD) and the southern annular mode (SAM) variability. Atmospheric general circulation model experiments forced by an idealized IOD sea surface temperature anomaly field suggest that the IOD-generated deep atmospheric convection anomalies trigger a Rossby wave train in the upper troposphere that propagates into the southern extratropics and induces positive geopotential height anomalies over southern Australia, independent of the SAM. The positive geopotential height anomalies extended from the upper troposphere to the surface, south of the Australian continent, resulting in easterly wind anomalies off the Western Australia coast and a reduction of the high-frequency synoptic storm events that deliver the majority of southwest Australia rainfall during austral winter and spring. In the marine environment, the wind anomalies and reduction of storm events may hamper the western rock lobster recruitment process.
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Gooding, S., T. L. Botwright Acuña, P. N. Fox, and L. J. Wade. "Emergence, stand establishment and vigour of deep-sown Australian and CIMMYT wheats." Australian Journal of Experimental Agriculture 46, no. 9 (2006): 1167. http://dx.doi.org/10.1071/ea05200.
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The short coleoptile of the majority of released Australian wheat cultivars, is well-documented to increase time to emergence and reduce stand establishment. We examined the effect of seeding depth on coleoptile length and seedling characteristics of 36 CIMMYT wheats, bred for their ability to emerge from deep sowing, relative to 14 Australian cultivars in controlled and field environments. Coleoptile length of one of the CIMMYT lines, Berkut, exceeded that of Vigour 18 when grown in the dark in a controlled environment. In a second experiment in controlled conditions, this time with a regular day/night cycle, seedlings of 4 CIMMYT and 4 Australian cultivars emerged from 5 and 8 cm sowing depths, but only 50% of the Australian wheats emerged from 11 cm, compared with 100% for the CIMMYT wheats. In a third experiment, 6 cultivars were sown at depths of 5, 8 and 11 cm at 2 field sites with different soil types (a sandy loam duplex and a red clay) at Kukerin, Western Australia. Field site and sowing depth interacted for emergence time, stand establishment and coleoptile length, with higher values of each at the clay site. The first internode elongated at both field sites, but to a lesser extent on the clay soil, where the response was only observed with deep sowing. CIMMYT wheats Parus/Pastor and Berkut were notable for rapid emergence, a long sub-crown internode and coleoptile, and above-average leaf area in controlled and field environments, in comparison with Australian cultivars. These lines hold promise as genetic sources of improved stand establishment and early vigour in wheats for use in Australia and similar environments.
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Rickert, KG, RH Sedgley, and WR Stern. "Environmental response of spring wheat in the south-western Australian cereal belt." Australian Journal of Agricultural Research 38, no. 4 (1987): 655. http://dx.doi.org/10.1071/ar9870655.
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The performance of the spring wheat cultivar Gamenya, the leading cultivar in Western Australia since 1968, was studied to identify key aspects of its response to the environment under typically dry conditions on two contrasting soil types: a heavy clay loam and a light loamy sand overlying clay in the Merredin region.In the rain-fed treatments the total water use was similar on both soils and was of the order of 240 mm. On the heavy-textured soil at high nitrogen, the foliage canopy developed more rapidly than on the light soil, resulting in earlier soil water depletion and haying off. Water use efficiencies of about 10 kg grain ha-1 per mm of water were similar to those reported for winter rainfall areas in south-eastern Australia. This suggests a greater degree of buffering against spring drought than is indicated by the high ratio of pre-anthesis to post-anthesis water use (3-4.7:l) relative to values of 2-2.7:l in other parts of the Australian wheatbelt. Data on the partitioning of dry matter indicated that this buffering of the harsh spring conditions at Merredin may be due to a greater contribution of assimilates from pre-anthesis storage, to grain filling. In dry environments, further critical evaluation is needed of the role of stored assimilates in grain formation.Faster canopy closure on the heavy soil resulted from a higher density of shoots and possibly larger leaves. This led to the suggestion that on heavier, more fertile soils, an ideotype with restricted tillering, may be higher yielding. By the end of the season ear bearing shoot densities and total water use were the same on both soil types, thus masking earlier important differences.
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Moritz, C. "The origin and evolution of parthenogenesis in Heteronotia binoei (Gekkonidae): evidence for recent and localized origins of widespread clones." Genetics 129, no. 1 (September 1, 1991): 211–19. http://dx.doi.org/10.1093/genetics/129.1.211.
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Abstract The parthenogenetic form of the gecko lizard species Heteronotia binoei has an unusually broad geographic range and high genetic diversity. Restriction enzyme analysis revealed two basic types of mitochondrial DNA (mtDNA) among the parthenogens. One type is restricted to western populations. The other type, analyzed in detail here, was widespread, being found in populations from central to western Australia. The diversity within this widespread type was low. The variation among parthenogens from central to western Australia was similar to that found within local populations of the sexual species that provided the mtDNA, and was an order of magnitude less than the differentiation shown between sexual populations across the same geographic distance. Phylogenetic analysis revealed that the widespread type of mtDNA in the parthenogens is most closely related to mtDNAs from western populations of the "CA6" sexual parent. These data suggest that these parthenogenetic clones arose recently within a small geographic area, most probably in Western Australia. The parthenogens must have spread rapidly to occupy much of the central and western Australian deserts. This rapid and extensive range expansion provides strong evidence that parthenogenesis can be a successful strategy for lizards in an environment with low and unpredictable rainfall.
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Ronalds, B. F. "WESTERN AUSTRALIA—A TECHNOLOGY BASE FOR THE OIL AND GAS INDUSTRY." APPEA Journal 41, no. 1 (2001): 777. http://dx.doi.org/10.1071/aj00046.
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Oil and gas production is characterised by a truly international industry, and yet a unique local environment. Solutions developed elsewhere cannot always be imported directly for Australian use. For this reason alone, a strong local technology base is of value to the Australian oil and gas industry. Other benefits include the ability to provide high quality education and training for people entering, and already in, the industry.A case study is described where the Western Australian technology base is facilitating solutions to a specific challenge faced on the North West Shelf (NWS); namely, that the criteria for reliable development and operation of its offshore infrastructure for oil and gas production are more severe than other petroleum provinces, requiring new analytical tools to be developed.
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Dontje, Manon L., Peter Eastwood, and Leon Straker. "Western Australian pregnancy cohort (Raine) Study: Generation 1." BMJ Open 9, no. 5 (May 2019): e026276. http://dx.doi.org/10.1136/bmjopen-2018-026276.
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PurposeThe purpose of the Raine Study is to improve human health and well-being by studying the life-course of a cohort of Western Australians, based on a life-course conceptual framework that considers interactions between genetics, phenotypes, behaviours, the environment and developmental and social outcomes.ParticipantsBetween May 1989 and November 1991, 2900 pregnant women were enrolled in the Raine Study in Perth, Western Australia. In total, 2730 women gave birth to 2868 children (Generation 2) between August 1989 and April 1992. The mothers and fathers of Generation 2 are referred to as Generation 1 of the Raine Study. In the most recent Generation 1 follow-up, 636 mothers and 462 fathers participated.Findings to dateUntil the 26-year follow-up of Generation 1 the focus of research within the Raine Study was on outcomes in Generation 2, with information on the parents mainly being used to examine its influence on their children’s outcomes. For example, recent findings showed that several characteristics of mothers, such as obesity, early mid-gestational weight gain and socioeconomic status were associated with non-alcoholic fatty liver disease, adiposity and cardiometabolic characteristics in offspring. Other findings showed that parents with back pain were more likely to have offspring who experienced back pain. Also, non-linear and dynamic relationships were found between maternal working hours and offspring overweight or obesity.Future plansThe Raine Study will continue to provide access to its dense longitudinal genetic, phenotypic, behavioural, environmental, developmental and social data to undertake studies with the ultimate goal of improving human health and well-being. Analyses of data from the recent Generation 1 year 26 follow-up are underway.Trial registration numberACTRN12617001599369
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Hillier, Jean, and Jason Byrne. "Is extermination to be the legacy of Mary Gilbert’s cat?" Organization 23, no. 3 (April 21, 2016): 387–406. http://dx.doi.org/10.1177/1350508416629455.
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Once imported to Australia as rodent controllers, cats are now regarded as responsible for a second wave of mammal extinction across the continent. Utilising the Foucauldian concept of biopolitics, we investigate critically the institutional field of cat regulation in Australia, exemplified by the Western Australian Cat Act 2011 and the Federal Environment Minister’s 10-year campaign to eradicate feral cats. Analysis of the biopolitical dispositif of ferality, and its elements of knowledge, subjectivation and objectivation and power processes, illustrates the dispositions through which what might be regarded as felicide has become organisational practice. We propose alternative practices emphasising the productive potentialities of biopolitics.
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Shaughnessy, Peter D., Simon D. Goldsworthy, Paul Burch, and Terry E. Dennis. "Pup numbers of the Australian sea lion (Neophoca cinerea) at The Pages Islands, South Australia, over two decades." Australian Journal of Zoology 61, no. 2 (2013): 112. http://dx.doi.org/10.1071/zo13015.
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The Australian sea lion is an Australian endemic, restricted to South Australia and Western Australia, with 86% of the population in South Australia. It was listed under the Commonwealth Environment Protection and Biodiversity Conservation Act as Vulnerable in February 2005, and the International Union for the Conservation of Nature has listed it as Endangered. Sea lions are taken as bycatch in the gill-net fishery for school shark and gummy shark, and the risk of extinction of breeding colonies is high even from low levels of bycatch. We assessed trends in pup population size at The Pages Islands, a large breeding colony in South Australia. Pup abundance was estimated by direct counting of live and dead pups; the maximum count in each breeding season was used for trend analysis. The average of direct counts of pups in 14 breeding seasons between 1989–90 and 2009–10 was 473 (s.d. = 58.4). There was no trend in pup numbers, contrasting with two other large colonies: Seal Bay, Kangaroo Island (decreasing), and Dangerous Reef (increasing since 2000). The Australian Sea Lion Management Strategy of the Australian Fisheries Management Authority aims to reduce sea lion bycatch in the shark fishery; a key item is a fishery closure around each breeding colony in South Australia. Implementation of the closure around The Pages should lower the risk of bycatch of its sea lions with foraging areas that previously overlapped with the fishery and should allow the colony’s population size to increase.
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Paynter, B. H., P. E. Juskiw, and J. H. Helm. "Phenological development in two-row spring barley when grown in a long-day (Alberta, Canada) and a short-day (Western Australia, Australia) environment." Canadian Journal of Plant Science 81, no. 4 (October 1, 2001): 621–29. http://dx.doi.org/10.4141/p00-104.
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Phenological development in eight cultivars of two-row, spring barley (Hordeum vulgare L.) was examined when sown at two dates of seeding in two diverse environments. These environments were a short-day environment at Northam, Western Australia, Australia, in 1997 and a long-day environment at Lacombe, Alberta, Canada, in 1998. The Australian and Canadian barley cultivars used had different combinations of basic vegetative phase and daylength sensitivity. Barley grown at Lacombe reached each stage of phenological development in less time than at Northam. Most noticeable was a shorter duration of the period between seedling emergence to double ridge and between double ridge and awn emergence. At Northam, nearly 20% of the barley’s life cycle was spent on vegetative growth, just over 40% on ear/stem growth and close to 40% on grain filling. At Lacombe, barley spent nearly 55% of its life cycle filling grain and only 10% on vegetative growth and 35% on ear/stem growth. Later seeding accelerated all stages of development at Northam but only those stages until awn emergence at Lacombe. Late-sown barley at Lacombe took longer to reach physiological maturity. The relative contribution of each phase of crop growth was unaffected by date of seeding. Based on the time to awn emergence, Franklin was a very late flowering cultivar in both environments; Fitzgerald, Gairdner and Manley were late flowering; AC Oxbow and Harrington were mid-flowering; and Stirling was early flowering. Skiff was late flowering at North am but early flowering at Lacombe. Key words: barley (spring), phenological development, daylength sensitivity, basic vegetative phase
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Lough, Janice M., and Alistair J. Hobday. "Observed climate change in Australian marine and freshwater environments." Marine and Freshwater Research 62, no. 9 (2011): 984. http://dx.doi.org/10.1071/mf10272.
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The consequences of human activities increasing concentrations of atmospheric greenhouse gases are already being felt in marine and terrestrial environments. More energy has been trapped in the global climate system, resulting in warming of land and sea temperatures. About 30% of the extra atmospheric carbon dioxide has been absorbed by the oceans, increasing their acidity. Thermal expansion and some melting of land-based ice have caused sea level to rise. Significant climate changes have now been observed across Australia and its coastal seas. The clearest signal is the warming of air and sea temperatures and the rates of warming have accelerated since the mid-20th century. Ocean warming has been higher than the global average around Australia, especially off south-eastern Australia. Changes in Australia’s hydrological regime are more difficult to differentiate from the high natural inter-annual variability. Recent trends towards drier winters in south-western Western Australia and part of southern Australia appear, however, to be largely attributable to human-induced climate change. Even without significant changes in average rainfall, warmer temperatures increase evaporative losses, enhance the intensity of recent droughts and reduce river flows. Sustained and coordinated monitoring of the physical environment, especially lacking for Australia’s freshwater ecosystems, is important to assess the magnitude and biological consequences of ongoing changes.
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Cousin, Jarrad A., and Ryan D. Phillips. "Habitat complexity explains species-specific occupancy but not species richness in a Western Australian woodland." Australian Journal of Zoology 56, no. 2 (2008): 95. http://dx.doi.org/10.1071/zo07065.
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Habitat complexity is an important factor governing species richness and habitat selection in birds. The present study examined this relationship in a large wandoo woodland in Western Australia. Habitat complexity (comprising canopy, shrub, ground vegetation, log and leaf litter cover) and bird species richness was recorded in 48 sites, each ~3 ha in size. We found no significant correlation of habitat complexity with species richness. We propose that the absence of such a relationship results from the resource-poor environment of the woodlands of south-western Australia. The relative scarcity of food resources results in a species richness threshold beyond which there are insufficient niches and resources to support additional species with increasing habitat complexity. Only two species exhibited significant associations with habitat complexity, with the western yellow robin (Eopsaltria griseogularis) occupying sites with higher habitat complexity, and the restless flycatcher (Myiagra inquieta) occupying sites with lower habitat complexity. Although some species may respond specifically to habitat complexity, management of avian biodiversity within Australian woodlands should take into account the potentially greater role that productivity and resource availability play in influencing species richness, rather than habitat complexity per se. Furthermore, the individual components comprising habitat complexity may be of equal importance in assessing relationship of species richness to overall habitat complexity.
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Lourey, M. J., and H. Kirkman. "Short-lived dissolved nitrate pulses in a shallow Western Australian coastal lagoon." Marine and Freshwater Research 60, no. 10 (2009): 1068. http://dx.doi.org/10.1071/mf08298.
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The source of nutrients that sustains abundant benthic primary productivity on Western Australian coastal reef systems is unknown, but it is possible that cycling between organic matter production and remineralisation contributes and may be enhanced by variations in the magnitude of physical forcing. We have used a 5-year nitrate dataset collected at weekly, daily and hourly temporal scales to investigate dynamics and supply mechanisms in Marmion Lagoon, Perth, Western Australia. Nitrate concentrations were variable over short time scales (hours) and formed pulses of elevated nutrient concentrations. On average, nitrate concentrations were highest during the high energy winter period (June to August) and scant wave data (June to August 1984) suggest a general correlation between wave activity and nitrate concentration. While it was not possible to definitively link variations in nitrate to wave forcing, increased energy may have promoted carbon recycling and nitrate release (possibly through abrasion of macroalgae, resuspension of detrital material or enhanced pore water exchange). Rapid uptake suggests that the nitrate pulses observed here may help sustain primary productivity in this shallow high energy environment. High temporal (hourly) variability suggests future surveys must sample at a frequency adequate to isolate long-term temporal trends from short-term background variations.
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Prabawa-Sear, Kelsie, and Vanessa Dow. "Education for Sustainability in Western Australian Secondary Schools: Are We Doing It?" Australian Journal of Environmental Education 34, no. 3 (November 2018): 244–61. http://dx.doi.org/10.1017/aee.2018.47.
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AbstractThis research was commissioned by the (then) Department of Environment and Conservation (DEC) to provide recommendations on how to best support Western Australian (WA) secondary schools to engage in education for sustainability (EfS). The research aims were to identify barriers and benefits to being involved in EfS, the support systems required for schools to participate in EfS at secondary school level, and the difficulties that secondary schools experience when implementing EfS programs. A variety of research methods were utilised: semi-structured interviews with non-teaching stakeholders; online questionnaires for teachers, school administrators and students; focus groups and semi-structured interviews with teachers and school administrators; and an expert panel workshop to discuss data and recommendations prior to completion of a final report. Data were collected from 29 schools, 45 teachers and school administrators, 186 students, and various EfS external providers and stakeholders across metropolitan and regional WA. This article focuses on three issues identified in the data that we consider important and under-represented in discourses of EfS in Australia: lack of understanding about what EfS means among educators; lack of meaningful student involvement in EfS in secondary schools; and differing quality in EfS programs offered by external providers. We conclude this article by offering ways to improve EfS in WA secondary schools.
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Hall, Peter B., and Robert L. Kneale. "PERTH BASIN REJUVENATED." APPEA Journal 32, no. 1 (1992): 33. http://dx.doi.org/10.1071/aj91004.
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The northern Perth Basin is an area where recent seismic advances combined with new geological insight, have led to exploration success with a significant new gas field discovery at Beharra Springs and a number of other minor discoveries. This paper outlines 'new concepts' with regard to stratigraphy and structure and how this has been balanced with the commercial environment to rejuvenate exploration in the northern Perth Basin. The Perth Basin is unique in Australia, as running through the middle of the Basin is the West Australian Natural Gas (WANG) pipeline which will be operating at approximately 26 per cent of its capacity in 1992. With the deregulation of the natural gas market in 1988, supply of gas to the Western Australian market via the State Energy Commission of Western Australia (SECWA) pipeline from the Carnarvon Basin, and in particular, the North West Shelf project, can now be balanced with supply from the onshore Perth Basin carried by the WANG pipeline.The minimum economically viable gas field in the northern Perth Basin is calculated to be 15 BCF (16.05 PJ) and the expected median field size is 50 BCF (53.5 PJ) of recoverable gas. Based on the historical success rate of one in eight, typical finding costs are 12 c/MCF (12 c/GJ).In the 1990/91 financial year, eight onshore exploration wells were drilled in Western Australia of which five were drilled in the northern Perth Basin. Provided the market access and opportunities remain, it is anticipated that the recent technological developments will sustain exploration and development of the onshore northern Perth Basin.
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Paynter, B. H., P. E. Juskiw, and J. H. Helm. "Leaf development in two-row spring barley under long-day and short-day field conditions." Canadian Journal of Plant Science 84, no. 2 (April 1, 2004): 477–86. http://dx.doi.org/10.4141/p02-154.
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To gain an understanding of the adaptation of Australian and Canadian barley (Hordeum vulgare L.) cultivars to the environments of western Canada and Western Australia, phyllochron and number of leaves on the mainstem in eight cultivars of two-row, spring barley were examined when sown at two dates in two locations. The locations were a short-day environment at Northam, Western Australia, Australia in 1997 and a long-day environment at Lacombe, Alberta, Canada in 1998. At each location highly significant relationships between leaf number on the mainstem and thermal time were found (r2 > 0.94). Using linear estimates, the phyllochron of barley under short days was longer than under long days and was correlated to time to awn emergence. Later sowing shortened phyllochron under short days, but generally not under long days. Error messages from the linear regression analysis suggested that residuals were not random for all cultivars. Bilinear models were fitted to those datasets. Bilineal responses were observed under both short and long days, being independent of cultivar, date of seeding, final leaf number, phenological development pattern and time to awn emergence. The occurrence of a bilinear response was also independent of any ontogenetic events. The change in phyllochron occurred between leaves 4–7 at Northam and between leaves 6–9 at Lacombe. The leaf number at which the phyllochron change occurred was positively related to final leaf number and time to awn emergence. The phyllochron of early forming leaves was positively related to time to awn emergence and shorter than later forming leaves. Leaf emergence patterns in spring barley under both long-day and short-day conditions may therefore be linear or bilinear. Key words: barley (spring), Hordeum vulgare L., phyllochron, leaf emergence, daylength
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Wang, Carol Chunfeng, Lisa Whitehead, and Sara Bayes. "“They are friendly but they don’t want to be friends with you”: A narrative inquiry into Chinese nursing students’ learning experience in Australia." Journal of Nursing Education and Practice 7, no. 8 (March 7, 2017): 27. http://dx.doi.org/10.5430/jnep.v7n8p27.
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There is increasing interest in the phenomena of international student mobility and the growing global demand for skilled nurses. Little is known, however, about the learning experiences of Chinese nursing students at Australian universities. This study begins to address this gap. A narrative inquiry methodology was employed. In-depth interviews and focus group discussions, along with field notes and observations were conducted with six Chinese undergraduate nursing students studying undergraduate nursing in Western Australia. Chinese nursing students in Australia experienced fear and anxiety, driven by unfamiliarity with the hospital environment, education methods, and assessment expectations. Clinical placement experiences in Australian health services were identified by participants as the most stressful learning experience. Forming friendships with domestic students was difficult and rare for these students: none made friends with local students or joined university groups. Despite the challenges they experienced, the participants were motivated and adaptive to a new culture and learning methods, and all, demonstrated academic success. This study provides new knowledge about the learning experiences of Chinese nursing students at Australian universities. Many of the issues identified relate to the wider discussion around effective support for international students.
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Greenwell, C. N. "Inferred predation of Fairy Tern eggs by Ruddy Turnstones at Rottnest Island, Western Australia, an internationally significant shorebird site." Australian Field Ornithology 38 (2021): 115–17. http://dx.doi.org/10.20938/afo38115117.
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Ruddy Turnstones Arenaria interpres have been identified as egg-predators at seabird and shorebird colonies, including gull and tern colonies in the tropics and Northern Hemisphere. The Australian Fairy Tern Sternula nereis nereis is a threatened (Environment Protection and Biodiversity Conservation Act 1999: Vulnerable) coastal seabird, whose breeding behaviour and ecology expose it to a wide range of threats. This study describes inferred predation on Fairy Tern eggs at a small breeding colony on Rottnest Island, Western Australia, by Ruddy Turnstones, a previously unsuspected predator for thisspecies. Unlike the behavioural response shown towards Silver Gulls Larus novaehollandiae and Australian Ravens Corvus coronoides, which includes collective group defence and dive-bombing, Fairy Terns showed a lack of aggression towards Turnstones within the colony. The lack of a behavioural response suggests that the Terns did not recognise the Turnstones as predators, which may increase the risk of egg-predation. This study suggests that we should be alert to threats from unsuspected predators, which have the potential to reduce the breeding success of this Vulnerable tern.
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Rutherford, I. D., and C. Gippel. "Australia versus the World: do we face special opportunities and challenges in restoring Australian streams?" Water Science and Technology 43, no. 9 (May 1, 2001): 165–74. http://dx.doi.org/10.2166/wst.2001.0531.
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Australians do face special opportunities and challenges in attempting to restore or rehabilitate their streams, when compared with Western Europe and North America. Some of these differences arise from the physical and ecological character of our streams, particularly in terms of flow variability, stream power, sediment, vegetation interactions, and nutrient levels. We also have modest resources available per-unit-length of stream, and no massive freshwater fishing industry. These, and many other differences, combine to produce an environment in which it can be slower and more difficult to rehabilitate streams, and we have less confidence in the results. International case studies are tremendously useful but in some cases we need to be circumspect in applying the results directly to Australian streams.
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Stoddard, FL, and DR Marshall. "Variability in grain protein in Australian hexaploid wheats." Australian Journal of Agricultural Research 41, no. 2 (1990): 277. http://dx.doi.org/10.1071/ar9900277.
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Grain protein content and grain yield data were collected from 11 Interstate Wheat Variety Trials (IWVT) and other sources. The level of variation in grain protein content beyond that attributable to covariation in environment and yield was estimated using a generalized linear model. A range of almost 4% in corrected protein content was found among 204 lines tested in IWVT. The Western Australian cv. Tincurrin was approx1% lower in grain protein content than any other line, while Shortim, Sun 43A, QT2200-20, QT2612-1 and Sun 92A were all 1.4-1.7% higher than the pooled mean of 4 control cultivars (Cook, Eagle, Halberd and Oxley). Accessions did not vary significantly in protein content with change in yield. Results from a range of other independent trials confirmed those from IWVT. Wheats genetically capable of producing a higher concentration of protein in their grain at a given yield level came principally from the Sydney University and Queensland breeding programmes, and those producing a lower concentration principally from Victoria and Western Australia. Grain hardness was independent of grain protein content and many low protein hard wheats entering the IWVT fell well outside current international market requirements.
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Wylynko, B., and A. Hartley. "SUSTAINABILITY: A NEW ERA IN APPROVALS PROCESSES." APPEA Journal 44, no. 1 (2004): 797. http://dx.doi.org/10.1071/aj03043.
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With its in-principle approval of the Gorgon gas proposal, the Western Australian government has heralded a new era —the era of sustainability assessments.No longer confined to strict environmental criteria, sustainability assessments will also consider the economic and social aspects of proposed oil and gas developments. This has a number of ramifications for the legal framework within which existing approvals processes operate.This paper examines traditional environmental assessment as represented by the processes used by Western Australia and the Commonwealth (which will be applied to the Gorgon proposal). It finds that while economic and social factors are expressly included in the legal framework, these factors have not played a large role in either assessing the significance of proposal impacts or in determining the conditions to be placed on the proposals. In the case of Western Australia, in 1996 the Supreme Court overturned recommendations by the Environmental Protection Authority, and a subsequent decision by the Minister for the Environment, on the basis that they had considered extraneous economic factors.Soon after approving the Gorgon proposal, the Western Australian Government published a State Sustainability Strategy. The strategy calls for sustainability assessments to be built upon existing environmental assessment processes. Having outlined the traditional environmental assessment process, the paper draws out a series of principles that may serve as a starting point for discussion about how to create sustainability assessment processes from environmental assessment processes. Key principles include comprehensiveness and an articulation of the objectives to be met through the assessments.The notion of sustainability is gradually becoming incorporated into the environmental legal framework. Sustainability assessments may be the next step in the development of that framework.
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Egeberg, Helen, and Andrew McConney. "What do students believe about effective classroom management? A mixed-methods investigation in Western Australian high schools." Australian Educational Researcher 45, no. 2 (December 1, 2017): 195–216. http://dx.doi.org/10.1007/s13384-017-0250-y.
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Abstract Students’ views about teaching, learning, and school experiences are important considerations in education. The purpose of this study was to examine students’ perceptions of teachers who create and maintain safe and supportive learning environments. To achieve this, a survey was conducted with 360 students to capture students’ views on their classroom experiences. Follow-up focus group discussions were used to further elaborate and clarify students’ perceptions. Despite varying school contexts, students provided consistent reports that effective classroom managers meet students’ needs by developing caring relationships and controlling the classroom environment while developing student responsibility and engaging students in their learning.
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Denham, Felicity C., Wahidul K. Biswas, Vicky A. Solah, and Janet R. Howieson. "Greenhouse gas emissions from a Western Australian finfish supply chain." Journal of Cleaner Production 112 (January 2016): 2079–87. http://dx.doi.org/10.1016/j.jclepro.2014.11.080.
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Arceo, Aldrick, Wahidul K. Biswas, and Michele John. "Eco-efficiency improvement of Western Australian remote area power supply." Journal of Cleaner Production 230 (September 2019): 820–34. http://dx.doi.org/10.1016/j.jclepro.2019.05.106.
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Smith, RCG, J. Adams, DJ Stephens, and PT Hick. "Forecasting wheat yield in a Mediterranean-type environment from the NOAA satellite." Australian Journal of Agricultural Research 46, no. 1 (1995): 113. http://dx.doi.org/10.1071/ar9950113.
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This paper reports the relationship between the spatial variation in mean wheat yield/ha of 50 Local Government Areas in Western Australia and satellite measures of the Normalized Difference Vegetation Index (NDVI). Yield/ha was based on estimates of the area harvested and actual grain received by the Cooperative Bulk Handling Ltd. The study area covered 16.3 million ha, in which 2.9 million ha of wheat were sown and 4.66 million tonnes of grain harvested. This was 78% of the total Western Australian wheat crop. Spatial variations in NDVI in early July, at around stem elongation, accounted for 46% of the spatial variation in final yield. This increased to 56% of yield variance around the onset of anthesis at the end of August. It remained high until early November (48%) when crops were senescing or senescent. A combination of NDVI from late August and early November accounted for 70% of the yield variance. In comparison, total rainfall during the 1992 growing season from April to October, the main determinant of yield variations, accounted for 28% of the yield variation. The significant correlation of NDVI with final yield by the middle of the growing season 3 to 5 months before harvest indicates the feasibility of making useful yield forecasts from this time onwards. In addition, the NDVI could provide useful spatial information on the significance of the yield/canopy development/water use relationship which underlies this correlation.
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Pearson, David J., Linda E. Neaves, Mike Paxman, Anthony Desmond, Juanita Renwick, Merril Halley, Nicole Willers, and Mark D. B. Eldridge. "Identification of a remnant population of the black-flanked rock-wallaby (Petrogale lateralis lateralis) in Kalbarri National Park, Western Australia, and implications for its management." Australian Mammalogy 41, no. 2 (2019): 196. http://dx.doi.org/10.1071/am18021.
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Black-flanked rock-wallabies (Petrogale lateralis lateralis) were thought to be locally extinct in Kalbarri National Park, Western Australia, until 2015 when a pair were photographed in the Murchison River gorge. Subsequent searches failed to locate any other populations and, in combination with previous surveys, suggest that these animals were the sole survivors of a formerly abundant population. Efforts to capture the rock-wallabies to obtain tissue samples and ascertain their genetic affinities were unsuccessful. However, fresh faecal material was collected and a ~600-bp fragment of DNA sequence data was obtained from a mitochondrial DNA gene. The Kalbarri rock-wallabies were found to be genetically distinct from all other sampled populations of P. l. lateralis. They were genetically most similar to rock-wallabies in the Calvert Range, 950km to the north-east in the Little Sandy Desert. Nearer populations in Cape Range (600km north) and the Western Australian Wheatbelt (500km south-east) were less closely related. Following evaluation of a variety of factors, including population size, genetics, demography, ecology, environment and logistics, a decision was made to supplement the Kalbarri National Park population with females sourced from the Western Australian Wheatbelt. In May 2016 three females were released at the same site as the Kalbarri pair to try to ensure the survival of the population whilst still preserving unique Kalbarri alleles.
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Hesp, S. Alex, and Ian C. Potter. "Reproductive biology of Rhabdosargus sarba (Sparidae) in Western Australian waters, in which it is a rudimentary hermaphrodite." Journal of the Marine Biological Association of the United Kingdom 83, no. 6 (December 2003): 1333–46. http://dx.doi.org/10.1017/s0025315403008786.
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The reproductive biology of the tarwhine Rhabdosargus sarba has been studied in three very different environments in Western Australia, namely the lower reaches of the Swan River Estuary and marine waters at the same latitude, i.e. ≈32°S, and a large subtropical marine embayment (Shark Bay) approximately 800 km further north. A macroscopic and histological examination of the gonads demonstrated that R. sarba is typically a rudimentary hermaphrodite in Western Australian waters, i.e. the juveniles develop into either a male or female in which the ovarian and testicular zones of the gonads, respectively, are macroscopically undetectable. This contrasts with the situation in the waters off Hong Kong and South Africa where R. sarba is reported to be a protandrous hermaphrodite. Although R. sarba spawns between mid-late winter and late spring in each water body, the onset of spawning in the estuary is delayed until salinities have risen well above their winter minima. Although males and females attain sexual maturity at very similar lengths in the Swan River Estuary and Shark Bay, i.e. each L50 for first maturity lies between 170 and 177 mm total length (TL), they typically reach maturity at an earlier age in the former environment, i.e. 2 vs 3 years old. During the spawning period, only 25 and 12% of the males and females, respectively, that were caught between 180 and 260 mm TL in nearshore marine waters were mature, whereas 94 and 92% of the males and females, respectively, that were collected in this length-range over reefs, were mature. This indicates that R. sarba tends to move offshore when it has become ‘physiologically’ ready to mature. The L50s at first maturity indicate that the minimum legal length in Western Australia (230 mm TL) is appropriate for managing this species.
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Merritt, D. J., T. Senaratna, D. H. Touchell, K. W. Dixon, and K. Sivasithamparam. "Seed ageing of four Western Australian species in relation to storage environment and seed antioxidant activity." Seed Science Research 13, no. 2 (June 2003): 155–65. http://dx.doi.org/10.1079/ssr2003133.
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AbstractThe influence of the storage environment on seed viability and antioxidant potential was examined for four species native to Western Australia: Acacia bivenosa DC., Anigozanthos manglesii D. Don, Banksia ashbyi E.G. Baker, and Mesomelaena tetragona (R. Br.) Benth. Seeds were stored at four water contents (at c. 5%, 11–15%, 20–23% and 50% relative humidity) at each of five temperatures (–196, –18, 5, 23 and 50°C), and seed germination and seedling vigour monitored over an 18-month period. Deterioration was apparent in all species (except A. bivenosa) stored at 50°C, with 11% RH maximizing longevity for B. ashbyi and M. tetragona seeds, and 5% or 11% RH preventing deterioration for A. manglesii seeds. Seed viability generally remained high for all species stored at 23°C or less. Notably, however, germination and seedling vigour of A. manglesii and M. tetragona seeds gradually declined when stored at –18°C, suggesting that storage at this temperature was detrimental. The antioxidant activity of lipid extracts of seeds after 18 months storage at 5, 23 and 50°C was also examined to determine whether the seed viability decline was associated with a loss of antioxidants. Antioxidant activity varied between storage treatments and was not related to seed viability.
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Lewis, D. C., M. D. A. Bolland, R. J. Gilkes, and L. J. Hamilton. "Review of Australian phosphate rock research." Australian Journal of Experimental Agriculture 37, no. 8 (1997): 845. http://dx.doi.org/10.1071/ea96103.
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Summary. Most of the research on the effectiveness of phosphorus (P) fertilisers in Australia has involved comparing phosphate rock (PR) or partially acidulated PR (PAPR) with superphosphate (SP) or other water-soluble P fertilisers. There are many estimates of effectiveness (current relative effectiveness or CRE) which compared freshly-applied (current) PR and freshly-applied (current) SP. The CRE values for PR range from <0.1 to 2.5, with a mean value for apatite PR of 0.26 and 0.43 for calcined calcium iron aluminium PR (Calciphos). As measured in field experiments in the years after application, and using current SP as a basis for comparison, the residual effectiveness of PR (residual value or RV) is low and constant for up to 11 years after application. Phosphate rock is 5–30% as effective as current SP. The average value of RV for SP declines by about 40% in the first year after application, followed by a further 15% in the second year, and a further 30% over the remaining 6 years. Values of relative effectiveness and RV, and the rate of decline in RV differ substantially between sites and sometimes between plant species. Laboratory studies of reactions between PR and soil have shown that the poor effectiveness of PR is primarily due to the limited extent and rate of dissolution of these fertilisers compared with the almost complete and rapid dissolution of water-soluble P fertilisers. Many Australian soils are only moderately acid (pH in water >5.5) with low pH buffering capacities and they cannot quickly contribute a large supply of hydrogen ions to promote rapid dissolution of PR. Soils are commonly sandy and have low water-holding capacities; in the strongly seasonal Mediterranean climate of south-western and southern Australia, the fertilised surface soil rapidly dries between rains thereby restricting PR dissolution. This restricted dissolution contributes to the poor agronomic effectiveness of PR fertilisers. Studies in Western Australia have shown that the effectiveness of current and residual PR relative to current SP generally decreases with increasing level of application. Therefore, relative to current SP, PR fertilisers become less effective per unit of PR as more is applied to the soil. Consequently, PR fertilisers frequently cannot support the same maximum yield as current SP. Published work indicates that PR fertilisers cannot be regarded as economic substitutes for SP for most agricultural applications in Australia. However, much Australian research has used low reactive PRs in conditions that are not likely to favour even highly reactive PRs. The soils dry out between rains during the growing season and have insufficient hydrogen ions to cause rapid, extensive dissolution of even reactive PR. Research elsewhere has suggested that reactive apatite PRs can be as effective as SP for suitable soils and environments. These are soils that remain wet for the whole growing season and which contain sufficient hydrogen ions to cause rapid dissolution of reactive PR. Laboratory studies, in which there is no P leaching, on 254 different soils collected from throughout south-western Australia showed that 29 soils, all collected from >800 mm average annual rainfall areas, dissolved >40% highly reactive North Carolina PR, suggesting that in the field these soils could be suitable for highly reactive PRs. Insufficient research has been conducted in the high rainfall areas of Australia, where the environment is more likely to favour highly reactive PR, and PAPR made from highly reactive PR. Therefore, a national program was undertaken in 6 Australian states to identify circumstances under which PRs, including reactive PR and PAPR made from reactive PR, may be economic fertilisers for acidic soils in the high rainfall areas of Australia where agricultural production is largely based on pasture production.
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Little, Helen, Ellen Beate Hansen Sandseter, and Shirley Wyver. "Early Childhood Teachers' Beliefs about Children's Risky Play in Australia and Norway." Contemporary Issues in Early Childhood 13, no. 4 (January 1, 2012): 300–316. http://dx.doi.org/10.2304/ciec.2012.13.4.300.
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Positive risk-taking in the context of outdoor physical play is important for fostering children's optimal health and development. Despite this, there is mounting concern that many developmentally beneficial activities are now seen as dangerous and something to be avoided. However, perceptions of risk are very much subject to cultural interpretation, and the growing risk aversion evident in some developed Western societies, such as Australia, the United Kingdom and the United States of America, is less apparent in other developed countries, notably some of the European and Scandinavian countries. To explore some of these cultural differences, early childhood practitioners from Australia and Norway were interviewed regarding their provision of outdoor play experiences for children and their attitudes towards risk-taking in play. Practitioners from both countries recognised the importance of risky play for children's development and well-being. However, differences in the extent to which children's risky play was supported were evident. Factors associated with the quality of the outdoor environment, regulatory requirements, and a litigious environment were identified as constraining teaching practice for the Australian practitioners. The findings have implications for the development of policy that supports teachers' pedagogical decision-making in providing developmentally challenging play environments for children.
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Lunney, Daniel. "Future dilemmas for argumentative conservation biologists." Pacific Conservation Biology 8, no. 3 (2002): 145. http://dx.doi.org/10.1071/pc020145.
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PACIFIC, meaning tending to make peace or conciliatory, is hardly a word that one associates with Harry Recher, the editor of Pacific Conservation Biology. Argumentative is far nearer the mark, and for good reason. He is tired, as he said forcefully to many friends in July this year, of the absolute futility of trying to get people and governments to wake up and change. At the time he uttered those words in July 2002 he had just returned from a trip to north-west Australia. Once you reach the cattle country, he said, it is clear that the intent of pastoralists is to convert the entire landscape into a vast paddock void of shrubs and other life forms bar introduced grass species and cattle. He also declared that what is happening to the Western Australian pastoral zone equals the destruction occurring in Queensland through land clearing. Thus in a few sentences Recher has put his finger on the central issues of environmental degradation in Australia as identified in both the Biodiversity State of the Environment Report 2001 (Williams et al. 2001) and the CSIRO Report Future Dilemmas: Options to 2050 for Australia's population, technology, resources and environment by Barney Foran and Franzi Poldy, which was launched by the Immigration Minister on 6 November 2002 (www.cse.csiro.au/futuredilemmas).
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Sivapalan, Siva, Graeme Batten, Ashantha Goonetilleke, and Serge Kokot. "Yield performance and adaptation of some Australian-grown rice varieties through multivariate analysis." Australian Journal of Agricultural Research 58, no. 9 (2007): 874. http://dx.doi.org/10.1071/ar06357.
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Rice breeders are involved in developing new varieties for a diverse range of production environments to increase average yields. Interpretation of performance of several varieties evaluated in a broad range of environments is usually affected by variety × environment interactions. Application of multivariate analyses, especially multi-criteria decision making (MCDM) methods in variety × environment interaction studies can benefit interpretation of yield performance and adaptation of varieties in response to different environments. The case study discussed in this paper highlights the significant advantages of using MCDM methods to overcome constraints imposed by having to investigate a large number of variables inherent in such analysis. The grain yield of 13 rice varieties with varying characteristics, grown in 4 different regions in southern New South Wales (NSW), Australia, during the 2000–06 growing seasons was analysed using classification techniques and preference ranking organization method for enrichment evaluation (PROMETHEE) analysis. Significant variety × environment interaction was found to influence the yield performance of individual varieties across a range of environmental conditions. Classification of environments and geometrical analysis for interactive aid (GAIA) plot of PROMETHEE analysis identified the Murrumbidgee Irrigation Area (MIA) and Coleambally Irrigation Area (CIA) as higher yielding regions compared with the Eastern Murray Valley (EMV) and Western Murray Valley (WMV). Turbid water and cold weather conditions are suggested to explain the lower yield obtained in the WMV environment. In terms of varieties, Amaroo and Opus were identified as widely adaptable to most of the environments, while Jarrah was the least adaptable. Illabong can be considered as best adapted to the EMV or WMV regions, while Paragon and Reiziq can be regarded as best adapted to the MIA and CIA regions. Partial and complete ranking showed the interrelationships between the varieties for their yield performance and adaptation across all environments. Amaroo, Illabong, and Opus were ranked as the most preferred varieties, while Koshihikari, Kyeema, and Jarrah were ranked as the least preferred ones. Partial pre-order with 13 classes from PROMETHEE I analysis identified varieties with similar characteristics and aided the selection of suitable alternative varieties. The outcomes from the analyses reported here allow rice varieties or genotypes to be rated for yield stability for a specific or a range of different environments.
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Ikediashi, Cornelius, and Bassam Bjeirmi. "Oil and gas project management and success: a critical evaluation of oil and gas project management success in Australia." APPEA Journal 59, no. 1 (2019): 82. http://dx.doi.org/10.1071/aj18056.
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Australia remains in pole position to become the world’s leading exporter of liquefied natural gas (LNG) and the number one exporter in the future. Maintaining this trajectory will require the oil and gas industry in Australia to remain competitive in project delivery to continue to attract investments. Yet, the Australian project delivery environment poses a big threat to this trajectory. Several research studies, organisations and institutions have come up with a long list of generic factors contributing to project management success and failure. The aim of this study is to examine oil and gas projects in Australia with a view to ascertain their success or otherwise and the specific contributing factors. This study has used a qualitative method of research by examining secondary sources of information on four recent Western Australia LNG projects (Gorgon, Wheatstone, Prelude and Ichthys) and presenting them as case studies. Specifically, the research has used mostly online sources that are either independent reports or information sourced from company websites. The key findings suggest that major oil and gas projects in Australia fail, and that failure or success is determined by the ability of the project management team to deliver the project on budget and on schedule. This is exemplified by the projects examined in this study, which have all shown cost and schedule overruns. Six critical factors are observed as contributing to cost and schedule overrun: project location, high cost of executing projects in Australia versus overseas, skills shortages, overseas manufacturing, project complexity and cultural and environment issues. Innovation, collaboration and standardisation, as adopted from other regions, are the initial practices suggested for the Australian industry to overcome all six factors and encourage further investment.
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Siddique, KHM, SP Loss, SP Herwig, and JM Wilson. "Growth, yield and neurotoxin (ODAP) concentration of three Lathyrus species in mediterranean-type environments of Western Australia." Australian Journal of Experimental Agriculture 36, no. 2 (1996): 209. http://dx.doi.org/10.1071/ea9960209.
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The growth, phenology, grain yield and neurotoxin (ODAP) content of Lathyrus sativus, L. cicera and L. ochrus were compared with a locally adapted field pea (Pisum sativum L.) to examine their potential as grain legumes in Western Australian farming systems. About 17 lines of each species were obtained from ICARDA, Syria, and grown at 3 agro-climatically different sites. In general, the 3 species were later flowering than field pea, especially L. cicera and L. ochrus; however, L. sativus was the last species to mature. The best Lathyrus lines produced biomass near flowering similar to field pea. At the most favourable site, grain yields were up to 1.6, 2.6 and 1.7 t/ha for L. sativus, L. cicera and L. ochrus respectively, compared with a field pea grain yield of 3.1 t/ha. There was considerable genotype and environmental variation in ODAP concentration in the seed. On average, the ODAP concentration of L. ochrus (6.58 mg/g) was about twice that of L. sativus, and L. cicera had the lowest ODAP concentration (1.31 mg/g). Given that Lathyrus spp. have not had the same breeding effort as field pea and other grain legumes in Australia, these results encourage further selection or breeding. In the shor-tseasoned, mediterranean-type environment of Western Australia, harvest indices and grain yields could be improved with early flowering. Low ODAP concentration should also be sought.
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Farré, I., M. J. Robertson, G. H. Walton, and S. Asseng. "Simulating phenology and yield response of canola to sowing date in Western Australia using the APSIM model." Australian Journal of Agricultural Research 53, no. 10 (2002): 1155. http://dx.doi.org/10.1071/ar02031.
Full textAbstract:
Canola is a relatively new crop in the Mediterranean environment of Western Australia and growers need information on crop management to maximise profitability. However, local information from field experiments is limited to a few seasons and its interpretation is hampered by seasonal rainfall variability. Under these circumstances, a simulation model can be a useful tool. The APSIM-Canola model was tested using data from Western Australian field experiments. These experiments included different locations, cultivars, and sowing dates. Flowering date was predicted by the model with a root mean squared deviation (RMSD) of 4.7 days. The reduction in the period from sowing to flowering with delay in sowing date was accurately reproduced by the model. Observed yields ranged from 0.1 to 3.2 t/ha and simulated yields from 0.4 to 3.0 t/ha. Yields were predicted with a RMSD of 0.3–0.4 t/ha. The yield reduction with delayed sowing date in the high, medium, and low rainfall region (3.2, 6.1, and 8.6% per week, respectively) was accurately simulated by the model (1.1, 6.7, and 10.3% per week, respectively). It is concluded that the APSIM-Canola model, together with long-term weather data, can be reliably used to quantify yield expectation for different cultivars, sowing dates, and locations in the grainbelt of Western Australia.
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Goldsworthy, DS, BJ Saunders, JRC Parker, and ES Harvey. "Spatial assemblage structure of shallow-water reef fish in Southwest Australia." Marine Ecology Progress Series 649 (September 10, 2020): 125–40. http://dx.doi.org/10.3354/meps13445.
Full textAbstract:
Bioregional categorisation of the Australian marine environment is essential to conserve and manage entire ecosystems, including the biota and associated habitats. It is important that these regions are optimally positioned to effectively plan for the protection of distinct assemblages. Recent climatic variation and changes to the marine environment in Southwest Australia (SWA) have resulted in shifts in species ranges and changes to the composition of marine assemblages. The goal of this study was to determine if the current bioregionalisation of SWA accurately represents the present distribution of shallow-water reef fishes across 2000 km of its subtropical and temperate coastline. Data was collected in 2015 using diver-operated underwater stereo-video surveys from 7 regions between Port Gregory (north of Geraldton) to the east of Esperance. This study indicated that (1) the shallow-water reef fish of SWA formed 4 distinct assemblages along the coast: one Midwestern, one Central and 2 Southern Assemblages; (2) differences between these fish assemblages were primarily driven by sea surface temperature, Ecklonia radiata cover, non-E. radiata (canopy) cover, understorey algae cover, reef type and reef height; and (3) each of the 4 assemblages were characterised by a high number of short-range Australian and Western Australian endemic species. The findings from this study suggest that 4, rather than the existing 3 bioregions would more effectively capture the shallow-water reef fish assemblage patterns, with boundaries having shifted southwards likely associated with ocean warming.
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Chen, Li, and John Ryan. "Abalone in Diasporic Chinese Culture: The Transformation of Biocultural Traditions through Engagement with the Western Australian Environment." Heritage 1, no. 1 (July 19, 2018): 122–41. http://dx.doi.org/10.3390/heritage1010009.
Full textAbstract:
In October 2017, the Department of Primary Industries and Regional Development of Western Australia (WA) promulgated a new regulation on recreational abalone harvesting. A notable change was that, from 2017 on, the annual fishing season in the West Coast Zone was reduced to four days, from every December on Saturdays only. During the last decade, WA’s abalone fishing regulations have been overhauled frequently because of depleting local stocks. Worldwide, the marine heatwave resulting from climate change and illegal overfishing are considered the two principal reasons for abalone’s decline. Today, the highly lucrative abalone market has attracted more participants in recreational fishing in Perth, WA. Based on Asian natural heritage traditions and employing a multispecies sensory ethnographic methodology, this article provides an in-depth case study of the interaction between the local Chinese diaspora and the environment as represented in abalone harvesting practices. Between 2014 and 2016, the authors conducted one-on-one and focus group interviews with Chinese immigrants to Perth, WA, and also participated in abalone harvesting. The analysis reveals a suite of environmental influences on local Chinese diasporic life through heterogeneous forms of interaction between abalone and Perth-area Chinese immigrants.
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Jackson, Rebecca. "Playing Lotto with Rotto? Tourism, the environment and gambling with the ethos of a Western Australian island." Australian Geographer 39, no. 4 (December 2008): 495–519. http://dx.doi.org/10.1080/00049180802419211.
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Roux, J. M. "Production of polysaccharide slime by microbial mats in the hypersaline environment of a Western Australian solar saltfield." International Journal of Salt Lake Research 5, no. 2 (June 1996): 103–30. http://dx.doi.org/10.1007/bf01995826.
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Fulton, Graham R. "Woodland birds persisting in least disturbed environment: Birds of Dryandra Woodland 1953–2008." Pacific Conservation Biology 19, no. 1 (2013): 58. http://dx.doi.org/10.1071/pc130058.
Full textAbstract:
Woodland birds have seriously declined across southern Australian with local extinctions reported in many areas. Dryandra Woodland presents a contrasting picture to this decline with declining species persisting there. It retains an almost full community of birds, many of which have declined or disappeared from the surrounding wheatbelt. It is 27 000 ha of remnant woodland, situated ~160 km south-east of Perth, in south-western Australia. Birds were surveyed predominately by professional biologists and/or taken from their archives, publications and institutional databases for a 55 year period (173 observation years) from 1953 to 2008; 141 species were detected. Persistence rather than extinction and increase rather than decline were the dominant paradigms for the birds of Dryandra. This is the inverse of what has happened in the greater wheatbelt, in which Dryandra is located. It is postulated that Dryandra’s birds persist because their habitat is relatively unchanged compared to that of the surrounding wheatbelt. Despite the many ‘success stories’ some birds had declined, for example, Malleefowl Leipoa ocellata and Hooded Robin Melanodryas cucullata. Three species were judged to be locally extinct at Dryandra Spotted Nightjar Eurostopodus argus, Chestnut Quail-thrush Cinclosoma castanotum and Crested Bellbird Oreoica gutturalis.