Thematische Bibliographien / Wetlands South Australia

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Auswahl der wissenschaftlichen Literatur zum Thema „Wetlands South Australia“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 31. Januar 2023

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Zeitschriftenartikel zum Thema "Wetlands South Australia"

Halse, SA, MR Williams, RP Jaensch und JAK Lane. „Wetland characteristics and waterbird use of wetlands in south-western Australia“. Wildlife Research 20, Nr. 1 (1993): 103. http://dx.doi.org/10.1071/wr9930103.

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The presence or absence of 61 waterbird species on 95 wetlands in south-western Australia was related to six wetland characteristics: salinity, emergent vegetation, water depth, pH, phosphorus level and wetland size. More species were associated with salinity and vegetation than with other wetland characteristics. There were more positive associations with brackish than with fresh or saline wetlands and few species occurred in hypersaline wetlands. Trees or shrubs and sedges were the vegetation with which most species were associated; few species were recorded on completely open wetlands or those with only samphire. The 95 wetlands were classified into five groups on the basis of waterbird use. All wetland characteristics differed between groups but larger differences occurred in salinity, vegetation and water depth. The wetland group that supported most species also supported the highest numbers of waterbirds and most breeding species.

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Junk, Wolfgang J. „Long-term environmental trends and the future of tropical wetlands“. Environmental Conservation 29, Nr. 4 (Dezember 2002): 414–35. http://dx.doi.org/10.1017/s0376892902000310.

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Tropical wetlands assume important functions in the landscape and contribute considerably to the welfare of large parts of the human population, but they are seriously threatened because they are considered free resources of land and water. This review summarizes long-term environmental trends for tropical wetlands and predicts their future to the time horizon 2025. Many tropical countries do not have the economic strength, scientific and technological capacity, and/or administrative infrastructure to adequately react to the challenges of increasing population pressure and globalization of the economy with respect to the sustainable use of the resources. Furthermore, political instability and armed conflicts affect large areas in several tropical countries, hindering wetland research and management. Detailed wetland inventories are missing in most countries, as are plans for a sustainable management of wetlands in the context of a long-term integrated watershed management. Despite large regional variability, a continental ranking shows, in decreasing order of wetland integrity, South America, Africa, Australia and Asia, while efforts to mitigate human impacts on wetlands are largest and most advanced in Australia. Analysis of demographic, political, economic and ecological trends indicates fairly stable conditions for wetlands in tropical Australia, slight deterioration of the large wetland areas in tropical South America excepting the Magdalena and Cauca River flood plains where human population is larger, rapidly increasing pressure and destruction on many African and Central American wetlands and serious threats for the remaining wetlands in tropical Asia, by the year of 2025. Policy deficiencies, deficient planning concepts, limited information and awareness and institutional weakness are the main administrative reasons for wetland degradation and must be overcome to improve wetland management and protection in future. Intensification of international cooperation and assistance is considered of fundamental importance for most tropical countries to solve problems related to wetland research, protection and sustainable management.

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Kingsford, R. T., K. Brandis, R. F. Thomas, P. Crighton, E. Knowles und E. Gale. „Classifying landform at broad spatial scales: the distribution and conservation of wetlands in New South Wales, Australia“. Marine and Freshwater Research 55, Nr. 1 (2004): 17. http://dx.doi.org/10.1071/mf03075.

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Relatively few large-scale inventories of the world's wetlands exist because of the difficulties of spatial scale, associated cost and multiple objectives, often temporally confounded, that drive classification. The extent of wetlands across a large part of Australia (New South Wales, 80.6 million ha) was determined using satellite image analyses. These data allowed analyses of the distribution of wetlands, their conservation status and potential threats at different spatial scales; that is, State, coastal and inland, and catchment. Approximately 5.6% of New South Wales is wetland (4.5 million ha), mostly (96%) in inland river catchments. Broad classification allowed identification of the extent of wetland types: (i) floodplains (89%); (ii) freshwater lakes (6.6%); (iii) saline lakes (< 1%); (iv) estuarine wetlands (2.5%); and (v) coastal lagoons and lakes (1.5%). Conservation reserves protect only 3% of wetland area. The analyses identified the north-west as the key area for wetland conservation as most other catchments have lower wetland extent and more potential threatening processes. The first stage of a large-scale inventory is to determine the extent and location of wetlands, with immediate benefits for strategic conservation and management. Other objectives (e.g. classification, biotic composition, hydrology and threats) seldom have sufficient data available for large-scale inventories but can be completed later with resources.

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Wahren, C. H., R. J. Williams und W. A. Papst. „Alpine and Subalpine Wetland Vegetation on the Bogong High Plains, South-eastern Australia“. Australian Journal of Botany 47, Nr. 2 (1999): 165. http://dx.doi.org/10.1071/bt97106.

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The botanical composition and structure of wetland vegetation from seven sites in the alpine and subalpine tracts of the Bogong High Plains was sampled in 1995 and 1996. Sites were in the vicinity of Mts Nelse, Cope and Fainter. Sampling was based on contiguous 1-m2 quadrats along transects 20−70 m long across each wetland. Samples were ordinated using non-metric multidimensional scaling (NMDS). Floristic variation was assessed both within selected individual wetlands, and between wetlands from different regions. The relationship between the ordinations and environmental variables such as soil surface texture, soil depth and the amount of bare ground was tested by fitting vectors. Three dominant vegetation assemblages were identified. Closed heath, of hygrophyllous, scleromorphic shrubs such as Richea continentis and Baeckea gunniana, the rush Empodisma minus and the moss Sphagnum cristatum occurred on the deeper peats. Low open heath of Epacris glacialis and Danthonia nivicola occurred on shallow peats. Herbfields of Caltha introloba and Oreobolus pumilio occurred on stony pavements in two different physiographic situations&horbar;on relatively steep slopes (10−20°) at the head of wetlands, and on flat ground (slope < 2°), below the head of wetlands. The pavements on the steeper sites appeared to be associated with periglacial features such as solifluction lobes and terraces. Those on the flatter ground appeared to have been derived more recently. Wetlands in the Mt Cope region consisted of closed heath, low open heath and pavement herbfield in various proportions. Wetlands on Mt Fainter, which are subject to heavy trampling by cattle, were in a degraded condition, with a low cover of major hygrophyllous mosses and shrubs, and a high cover of introduced species. Long-ungrazed wetlands in a 50-year exclosure at Rocky Valley had high cover of closed heath, no pavements, numerous ponds and virtually no entrenched drainage channels or exposed peat. The Caltha herbfields are significant features nationally, both floristically and geomorphologically. Alpine and subalpine wetlands have been listed under the Victorian Flora and Fauna Guarantee Act 1988, and continued grazing by cattle is not compatible with the conservation objectives for this alpine vegetation type.

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Maher, MT, und LW Braithwaite. „Patterns of waterbird use in wetlands of the Paroo, A river system of inland Australia.“ Rangeland Journal 14, Nr. 2 (1992): 128. http://dx.doi.org/10.1071/rj9920128.

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The significance of inland wetlands to Australian waterbirds has been overlooked until recently. One important area identified from regular aerial survey centres on the Paroo River in north-western New South Wales. Between April 1983 and December 1985, a period covering a major flood, waterbird populations were estimated on five wetland systems associated with the Paroo during 14 trips. Fifty- three waterbird species were recorded with the anatids, Anas gibberifrons and Malacorhynchus membranaceus, accounting for 75 per cent of total estimated populations. Most breeding events were observed in those wetlands dominated by Muehlenbeckia florulenta (lignum). Breeding accounted for shifts in waterbird populations between wetland systems. A model of waterbird usage of the five wetland systems in relation to a complete flood event is described. The importance for waterbird conservation of wetlands used for breeding and maintenance of populations between flood events, and threats to the integrity of these wetlands are discussed.

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Bino, G., R. T. Kingsford und K. Brandis. „Australia's wetlands – learning from the past to manage for the future“. Pacific Conservation Biology 22, Nr. 2 (2016): 116. http://dx.doi.org/10.1071/pc15047.

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Australia has diverse wetlands with multiple threats. We reviewed knowledge about the extent of wetlands, representativeness, impacts and threats to integrity and options for effective conservation. Natural Australian wetlands cover an estimated 33 266 245 ha (4.4%), with 55% palustrine (floodplains and swamps), followed by 31% lakes, 10% estuarine systems, and 5% rivers and creeks. The Lake Eyre (1.1%), Murray–Darling (0.73%), Tanami–Timor Sea Coast (0.71%) and the Carpentaria Coast (0.55%) drainage divisions have more wetlands, also reflected in the distributions among states and territories. Ramsar sites and wetlands in protected areas were generally biased towards the southern continent. Overall representation of mapped wetlands was good for lacustrine (40.6%) and estuarine (34.4%), fair for riverine (16.8%), but inadequate for palustrine (10.8%) wetlands. Within drainage divisions, representation varied considerably, with shortfalls from the Aichi target of 17%. Agriculture, urbanisation, pollution and invasive species have degraded or destroyed wetlands, particularly in the developed south-east, south-west and north-east of the continent. Water resource developments, primarily the building of dams, diversion of water and development of floodplains, seriously threaten Australian wetlands, with all threats exacerbated by climate change impacts of rising sea levels and high temperatures. Management and policy for wetlands is dependent on data on distribution, type and extent of wetlands, a key national constraint. Some States are well advanced (e.g. Queensland) and others lack any comprehensive data on the distribution of wetlands. Mitigation of increasing development (e.g. northern Australia) will be critical for conservation, along with increased representativeness in protected areas and restoration, particularly with environmental flows.

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Gibson, N., G. J. Keighery, M. N. Lyons und B. J. Keighery. „Threatened plant communities of Western Australia. 2 The seasonal clay-based wetland communities of the South West“. Pacific Conservation Biology 11, Nr. 4 (2005): 287. http://dx.doi.org/10.1071/pc050287.

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The communities of seasonal clay-based wetlands of south-west Australia are described. They are amongst the most threatened In Western Australia. It is estimated that >90% of the original extent of these communities has been cleared for agriculture, and the remaining areas, despite largely occurring in conservation reserves, are threatened by weed invasion and rising saline groundwater. Thirty-six taxa are identified as claypan specialists occurring in six floristic communities. Composition was strongly correlated with rainfall and edaphic factors. The most consistent attribute shared between the seasonal clay-based wetlands of south-west Australia, and the analogous vernal pools systems of California, Chile, and South Africa was the widespread conversion of these wetlands to agricultural systems. The south-west Australia wetlands had a richer flora, different lifeform composition, higher species richness but fewer claypan specialists than the vernal pools of California. The dissimilarity in the regional floras and vegetation types from which the pool floras were recruited explain these differences.

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Mackenzie, Lydia, Henk Heijnis, Patricia Gadd, Patrick Moss und James Shulmeister. „Geochemical investigation of the South Wellesley Island wetlands: Insight into wetland development during the Holocene in tropical northern Australia“. Holocene 27, Nr. 4 (28.09.2016): 566–78. http://dx.doi.org/10.1177/0959683616670219.

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The South Wellesley Islands in the Gulf of Carpentaria, northern Australia, were the recent focus of a palynological investigation which found vegetation change during the Holocene was driven by coastal progradation and regional climate. Here, we present new elemental data from x-ray fluorescence core scanning which provides non-destructive, continuous and high resolution analysis from three wetlands across Bentinck Island, the largest of the South Wellesley Islands. Elemental data and grain size analyses are combined with lead-210 (210Pb) and accelerator mass spectrometry (AMS) carbon-14 (14C) dates. An open coastal environment was present 1250 cal. a BP on the south east coast of Bentinck Island, with sediment supply incorporating fluvial deposition and detrital input of titanium and iron from eroding lateritic bedrock. Prograding shorelines, dune development and river diversion formed a series of swales parallel to the coast by ~800 cal. a BP, forming the Marralda wetlands. Wetlands developed at sites on the north and west coasts ~500 and ~450 cal. a BP, respectively. Geochemical and grain size analyses indicate that wetlands formed as accreting tidal mudflats or within inter-dune swales that intercepted groundwater draining to the coastal margins. The timing of wetland initiation indicates localised late-Holocene sea level regression, stabilisation and coastal plain development in the Gulf of Carpentaria. Elemental data provide new records of wetland development across Bentinck Island, highlighting the value of a multi-proxy approach to understanding environmental change during the Holocene in tropical northern Australia.

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Moss, Patrick, John Tibby, Felicity Shapland, Russell Fairfax, Philip Stewart, Cameron Barr, Lynda Petherick, Allen Gontz und Craig Sloss. „Patterned fen formation and development from the Great Sandy Region, south-east Queensland, Australia“. Marine and Freshwater Research 67, Nr. 6 (2016): 816. http://dx.doi.org/10.1071/mf14359.

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The Great Sandy Region (incorporating Fraser Island and the Cooloola sand-mass), south-east Queensland, contains a significant area of Ramsar-listed coastal wetlands, including the globally important patterned fen complexes. These mires form an elaborate network of pools surrounded by vegetated peat ridges and are the only known subtropical, Southern Hemisphere examples, with wetlands of this type typically located in high northern latitudes. Sedimentological, palynological and charcoal analysis from the Wathumba and Moon Point complexes on Fraser Island indicate two periods of swamp formation (that may contain patterned fens), one commencing at 12 000 years ago (Moon Point) and the other ~4300 years ago (Wathumba). Wetland formation and development is thought to be related to a combination of biological and hydrological processes with the dominant peat-forming rush, Empodisma minus, being an important component of both patterned and non-patterned mires within the region. In contrast to Northern Hemisphere paludifying systems, the patterning appears to initiate at the start of wetland development or as part of an infilling process. The wetlands dominated by E. minus are highly resilient to disturbance, particularly burning and sea level alterations, and appear to form important refuge areas for amphibians, fish and birds (both non-migratory and migratory) over thousands of years.

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T. Kingsford, Richard, Rachael F. Thomas und Alison L. Curtin. „Conservation of wetlands in the Paroo and Warrego River catchments in arid Australia“. Pacific Conservation Biology 7, Nr. 1 (2001): 21. http://dx.doi.org/10.1071/pc010021.

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Irrigation proposals to divert water from the Paroo and Warrego Rivers in arid Australia will affect their aquatic ecosystems. These two are the last of 26 major rivers in the Murray-Darling Basin without large dams and diversions. Knowledge of the extent of their biodiversity value is critical to assessing likely impacts. During the 1990 flood, 1.73 million ha of wetlands, or 12.5% of the land surface of the Paroo and Warrego River catchments, were flooded. Flooded wetland area in the respective catchments was 781 330 ha and 890 534 ha. Most of the wetland area (97%) was floodplain, with 37 freshwater lakes (>50 ha) occupying 2.5% of the wetland area and 177 salt lakes covering 0.8%. A high diversity and abundance of biota depend on these wetlands. Only 7% of the wetland area, all in the Paroo catchment, is in conservation reserves. New South Wales has a high proportion of the wetland area on the Paroo (60%) and a substantial proportion of the wetland area on the Warrego River (23%). Queensland, the upstream state, will influence the ecology of the entire catchment areas of both river systems through its proposed water management plan. Any resulting extraction practices will have detrimental ecological consequences within a decade. Conservation of wetlands is usually site-focused and reflects a paradigm of conservation based on reservation of parcels of land. However, wetlands are dependent on water that is seldom adequately protected. Intergovernment co-operation should protect the entire catchment of the Paroo River from major diversions and stop further development on the Warrego River. This would do more for the conservation of wetlands than the formal reservation of small parts of their catchments.

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Dissertationen zum Thema "Wetlands South Australia"

Conran, Leigh Garde. „Establishment vegetation patterns in an artificial urban wetland as a basis for management“. Title page, contents and abstract only, 1991. http://web4.library.adelaide.edu.au/theses/09ENV/09envc754.pdf.

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Brownlow, Marcus D. „Water regime and the aquatic vegetation of Bool Lagoon, South Australia /“. Title page, table of contents and summary only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phb8852.pdf.

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Higginson, Gareth Edward. „The ecotourism potential of the Barber Inlet Wetlands, South Australia“. Title page, table of contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09ENV/09envh637.pdf.

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Bibliography: leaves 127-134. This thesis argues for the expansion of ecotourism in the Adelaide metropolitan Barker Inlet Wetlands, currently used for small scale ecotourism. Through analysing current literature and evaluating a range of ecotourism strategies, it demonstrates that the potential for and offers guidelines for ecotourism in the Barker Inlet Wetlands. Opprtunities for expansion lie primarily in environmental education, with a particular focus on Adelaide secondary schools.

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Ujma, Susan. „A comparative study of indigenous people's and early European settlers' usage of three Perth wetlands, Western Australia, 1829-1939“. Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2012. https://ro.ecu.edu.au/theses/547.

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This study takes as its focus the contrasting manner in which the Nyoongar indigenous people and the early European settlers utilised three wetland environments in southwest Australia over the century between 1829 and 1939. The thesis offers both an ecological and a landscape perspective to changes in the wetlands of Herdsman Lake, Lake Joondalup and Loch McNess. The chain of interconnecting linear lakes provides some of the largest permanent sources of fresh water masses on the Swan Coastal Plain. This thesis acknowledges the importance of the wetland system to the Nyoongar indigenous people. The aim of this research is to interpret the human intervention into the wetland ecosystems by using a methodology that combines cultural landscape, historical and biophysical concepts as guiding themes. Assisted by historical maps and field observations, this study offers an ecological perspective on the wetlands, depicting changes in the human footprint on its landscape, and mapping the changes since the indigenous people’s sustainable ecology and guardianship were removed. These data can be used and compared with current information to gain insights into how and why modification to these wetlands occurred. An emphasis is on the impact of human settlement and land use on natural systems. In the colonial period wetlands were not generally viewed as visually pleasing; they were perceived as alien and hostile environments. Settlers saw the land as an economic commodity to be exploited in a money economy. Thus the effects of a sequence of occupances and their transformation of environments as traditional Aboriginal resource use gave way to early European settlement, which brought about an evolution and cultural change in the wetland ecosystems, and attitudes towards them.

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Ryder, Darren Stuart. „Origin and fate of organic matter in South-West Australian wetlands“. Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2000. https://ro.ecu.edu.au/theses/1533.

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The development and local distribution of organic soils in Australia have been poorly documented. Within Western Australia, conditions conducive to the accumulation of organic matter are geographically restricted and generally occur in coastal and/or forested landscapes. An extensive system of wetlands with peal soils occurs in the Muir-Unicup region in the far south west of Western Australia. Bokarup Swamp, Kodjinup Swamp and Noobijup Lake are representative of the wetlands occurring in this region. They arc shallow (

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Jenkinson, Suzanne Marie. „The conservation value of small wetlands for waterbirds in the southeast of South Australia /“. Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09AR/09arj521.pdf.

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Taffs, Kathryn Helen. „Surface water hydrological change in the upper South East of South Australia /“. Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09pht124.pdf.

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Thesis (Ph. D.)--University of Adelaide, Dept. of Geography, 1997.
"Conducted as a cross-institutional student between the University of Adelaide and the Australian National Universiity." Includes bibliographical references.

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Anorov, Julie Margaret, und n/a. „Integrated Study of Coastal Wetland Characteristics and Geomorphic Processes in a South East Queensland Catchment“. Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060223.153104.

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Coastal wetlands are dynamic ecosystems that are highly susceptible to change due to natural and human factors. The study area, located within the Native Dog Creek sub-catchment of the Logan River - which drains into Moreton Bay, south east Queensland - holds a detailed history of environmental change spanning most of the Holocene epoch. This history is preserved in the estuarine sedimentary record and is a valuable indicator of natural environmental change. More recently, human-induced changes within the study area have been superimposed on the natural process of environmental change. In order to develop a conceptual bio-geomorphic model of the coastal wetlands of Native Dog Creek, this thesis examined - on an integrated catchment basis - the evolution and connectivity of four coastal wetland community types (Melaleuca, Casuarina, saltmarsh and mangroves). The research consisted of four discrete studies within the study area: a geomorphic investigation that provided a framework for understanding how the wetlands evolved during the Holocene epoch; an acid sulfate soil (ASS) study that surveyed the distribution and concentration of sulfides; a palynological study that examined the natural directions of ecosystem change; and an investigation of the impact of specific human activities on these ecosystems. Detailed stratigraphic modelling found that the Logan River system (and its Native Dog Creek sub-catchment) has evolved from an infilling estuary since the peak of the Holocene transgression 6500 years before present. Recognition of the major controls that influenced geomorphic coastal development during the Holocene, provided important insights into the distribution and genesis of estuarine pyritic sediments which strongly influence the soils within the study area. In general, the estuarine central basin and fluvial delta sediments posed the greatest risk to the environment from acidification if disturbed. The major focus of the ASS study was to survey the distribution of ASS and to identify other areas most vulnerable to acidification. A predictive approach that combined chemical and stratigraphic analysis was used. Results showed that these areas are intrinsically related to their environment of deposition. The study found, for example, that the alternation of excessively wet and dry conditions - combined with high organic carbon levels and variations in microtopography - provided ideal conditions for the re-formation of pyrite in the stream channel within the Melaleuca wetlands. The palaeo-environmental study reconstructed the evolution of Holocene coastal wetland vegetation during the marine transgression and subsequent shoreline progradation. Pollen records from the four representative wetland communities (previously mentioned) were examined. The results found the mid-late Holocene vegetation history was controlled by the development of geomorphic features that have affected freshwater input, drainage and salinity. In response to the progradation of the shoreline after sea level stabilised, changes in fossil pollen from mangroves and saltmarsh taxa during the early-mid Holocene, to freshwater taxa during the late Holocene, are estimated to have taken 800 years. Thus, pollen analysis when used in combination with stratigraphic modelling, provided an important point of reference for rates of natural ecological change in response to evolutionary changes to the physical environment. The wetlands within the study area have suffered varying degrees of disturbance since European settlement in the 1820s. The most significant changes occurred during early European settlement, when vast areas of coastal lowlands were cleared for timber, sheep and cattle grazing and for agricultural purposes. A second period of change occurred from 1989 to 1995, when the Melaleuca community suffered dieback in response to hydrological modifications to Native Dog Creek for the development of a golf course. Results indicate that human-induced changes over the past 170 years have occurred at a rate far beyond the ability of the natural ecosystem to adapt or move to a more ecologically sustainable state, at least in the short-term. Hence the current environment is experiencing degradation through both decline in health and loss of indigenous species. The development of a conceptual bio-geomorphic model was based on the integration of results from all four studies, in an effort to provide a holistic understanding of the coastal wetland environment and of the impact of human-induced changes upon that environment. If these vulnerable ecosystems are to be maintained, successful and sustainable coastal management strategies must rely on a sound scientific understanding of the response of a coastal ecosystem to both human and environmental changes.

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Wilton, Kylee Margaret, und res cand@acu edu au. „Coastal Wetland Habitat Dynamics in Selected New South Wales Estuaries“. Australian Catholic University. School of Arts and Sciences, 2002. http://dlibrary.acu.edu.au/digitaltheses/public/adt-acuvp29.29082005.

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Intertidal wetland habitats in southeastern Australia have changed significantly during the past sixty years. Mangrove habitats have expanded both seawards and landwards, the latter being at the expense of saltmarsh habitats. This relatively common phenomenon is generally suggested to be an outcome of sea-level rise. Several factors potentially responsible for this change are examined, including changes in mean sealevel during the past 50 to 100 years, changes in climate, population growth, catchment landuse, and estuary type. A protocol for mapping estuarine habitats was developed and implemented, incorporating the application of geographic information systems. Spatial and temporal coastal wetland habitat changes at nine sites along the New South Wales coast are illustrated. These habitat dynamics were shown to not correlate between sites. The results demonstrate that sea-level rise in this region cannot solely account for the extent of change during the past sixty years. With the exception of one site (Careel Bay), there have been no correlations between contemporary mean sea-level rise and mangrove incursion of the saltmarsh habitats at the study sites, or with rainfall patterns, at the scale of observation in this study, which was largely decadal. The only correlations determined during this study have been between population growth and coastal wetland habitat dynamics in some sites. In spite of saltmarsh habitat loss being a regional phenomenon, local factors appear to have a profound bearing on the rates of change. Neither contemporary mean sea-level rise, rainfall patterns, estuary type, catchment landuse, catchment natural cover nor population pressure can account solely for the patterns in the spatial and temporal dynamics of the coastal wetlands of New South Wales. It seems apparent that regional factors create preconditions favourable for mangrove incursion, but that localised conditions have been responsible for the extent of these incursions from site to site. That is, despite higher sea-level and greater rainfall, the extent of change has been determined by the unique characteristics of each site. The results have important implications for current estuary management practices in the state of New South Wales. The lack of spatial and temporal trends in coastal wetland habitat dynamics point to the need for management to be conducted on a localised, rather than regional scale. Additionally, anthropogenic influences must be carefully managed, since the extent of mangrove habitat expansion into saltmarsh areas is unlikely to be a natural occurrence.

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Thomas, Erin J. „Diatoms and invertebrates as indicators of pH in wetlands of the south-west of Western Australia“. Thesis, Curtin University, 2007. http://hdl.handle.net/20.500.11937/1065.

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Increased groundwater usage, rainfall decline and activities such as mining have resulted in the acidification of certain wetlands in the south-west of Western Australia. This study investigated the influence of pH, the factor most commonly associated with acidification, on the invertebrate and diatom community structure of 20 wetlands in the south-west region of Western Australia. Few studies in Western Australia have investigated both biotic groups, particularly in relation to pH. Consequently, this study examined the comparative sensitivity of the two biotic groups to pH in order to identify the most effective biotic tool for assessing the ecological impacts of pH decrease. The wetlands included in this study displayed a wide range of pH from acidic (pH < 6.5) to alkaline (pH > 7.5). Other environmental parameters were also variable. Separation of the wetlands into three pH groups; Group 1 – acidic, Group 2 – circumneutral and Group 3 – alkaline, demonstrated that the acidic Group 1 wetlands generally had higher electrical conductivity than the remaining groups. This was probably due to the association of many Group 1 sites with mining and acid sulphate soils. Seasonal trends in environmental variables across the three pH groups were mostly unclear although some trends were evident within the individual pH groups. The study showed that invertebrate community structure differed in response to pH. However, the results also demonstrated that invertebrate distribution patterns were influenced by other factors.Potential indicator species identified from the study included Macrothrix indistincta and Tanytarsus fuscithorax/semibarbitarsus which were abundant in acidic waters and Alona quadrangularis which was common in circumneutral sites. Taxa such as Calamoecia tasmanica subattenuata were common over a wider range of pH (acidic to circumneutral) but may still have potential to act as indicators of pH decline. Diatom community structure was also shown to be influenced by pH, with the variable identified as a major determinant of diatom distribution patterns. Nitzschia paleaeformis and Navicula aff. cari were generally recorded from acidic wetlands and are potentially useful as indicators of low pH conditions. Brachysira brebissonii and Frustulia magaliesmontana were also identified as species with the potential to indicate pH decline. In contrast, taxa including Gomphonema parvulum, Staurosira construens var. venter and Nitzschia palea were generally associated with moderate to high pH levels. A comparative study of the two biotic groups using multivariate analyses revealed that diatoms were more sensitive to pH than invertebrates. Further investigation with a larger number of environmental variables would be necessary to ascertain the other factors primarily influencing invertebrate community structure. Nonetheless, the findings imply that diatoms and invertebrates differ in their responsiveness to various environmental factors and may provide complementary information on the integrity of a system. Multivariate analyses on an expanded data-set of 40 sites found that pH accounted for the greatest amount of variation in the data and was conducive to the development of a diatom-based pH inference model.The strongest model was produced using weighted averaging (WA) with classical deshrinking. While the model displayed a high correlation coefficient, the prediction error was also relatively high, probably as a result of the comparatively small and heterogeneous data-set. Incorporation of the data into a larger training set would be likely to improve the predictive ability. Applications for the model include pH reconstructions or use in monitoring programs. The current study has shown that pH is an important variable influencing both invertebrate and diatom community structure in wetlands in the south-west of Western Australia. However, the greater sensitivity of diatoms to pH suggests that they would be the most effective tool for the biological monitoring of pH in wetlands threatened or impacted by acidification. An integrated monitoring program including both diatoms and invertebrates may provide additional information on the impacts of pH decline and the overall integrity of the systems and should be investigated further.

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Bücher zum Thema "Wetlands South Australia"

The Becher wetlands, a Ramsar site: Evolution of wetlands habitats and vegetation associations on a Holocene coastal plain, South-Western Australia. Dordrecht, The Netherlands: Springer, 2007.

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Chambers, J. A guide to emergent wetland plants of South-Western Australia. Perth, W.A: Marine and Freshwater Research Laboratory, Environmental Science, Murdoch University, 1995.

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Semeniuk, Christine. Becher Wetlands - a Ramsar Site: Evolution of Wetland Habitats and Vegetation Associations on a Holocene Coastal Plain, South-Western Australia. Springer, 2007.

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Semeniuk, Christine. The Becher Wetlands - A Ramsar Site: Evolution of Wetland Habitats and Vegetation Associations on a Holocene Coastal Plain, South-Western Australia. Springer, 2016.

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V. & C. Semeniuk Research Group., Hrsg. Mapping and classification of wetlands from Augusta to Walpole in the South West of Western Australia: Report to the Water and Rivers Commission. East Perth, W.A: Water and Rivers Commission, Policy and Planning Division, 1997.

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Benwell, Andrew. Plants of Subtropical Eastern Australia. CSIRO Publishing, 2020. http://dx.doi.org/10.1071/9781486313662.

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Plants of Subtropical Eastern Australia describes the rich flora of this biogeographically distinct region located on the east coast of Australia, covering the north coast of New South Wales and coastal South-East Queensland. This guide presents a selection of common, threatened and ecologically significant plants found in the region’s major vegetation habitats including rainforest, heathland, grassy forest, wetlands and rock outcrops. More than 500 plants are featured, with photographs and descriptive features enabling the reader to identify these species if encountered. Interesting biological, cultural and historical characteristics of each species are included, along with notes on the plant’s biogeography and a map of its distribution. Suitable for anyone with an interest in plant ecology and botany, Plants of Subtropical Eastern Australia is the definitive guide to this fascinating region of Australia and its unique flora.

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Western Australia. South West Development Authority. Advisory Committee., Hrsg. Wetlands of the south west: The role of local government and landowners in the management of wetlands in the south west of Western Australia : papers delivered at a workshop held on Saturday, November 24, 1990. [Perth? W.A: s.n., 1990.

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Steffen (Lead Author), Will. Australia's Biodiversity and Climate Change. CSIRO Publishing, 2009. http://dx.doi.org/10.1071/9780643098190.

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Australia's unique biodiversity is under threat from a rapidly changing climate. The effects of climate change are already discernible at all levels of biodiversity – genes, species, communities and ecosystems. Many of Australia's most valued and iconic natural areas – the Great Barrier Reef, south-western Australia, the Kakadu wetlands and the Australian Alps – are among the most vulnerable. But much more is at stake than saving iconic species or ecosystems. Australia's biodiversity is fundamental to the country's national identity, economy and quality of life. In the face of uncertainty about specific climate scenarios, ecological and management principles provide a sound basis for maximising opportunities for species to adapt, communities to reorganise and ecosystems to transform while maintaining basic functions critical to human society. This innovative approach to biodiversity conservation under a changing climate leads to new challenges for management, policy development and institutional design. This book explores these challenges, building on a detailed analysis of the interactions between a changing climate and Australia's rich but threatened biodiversity. Australia's Biodiversity and Climate Change is an important reference for policy makers, researchers, educators, students, journalists, environmental and conservation NGOs, NRM managers, and private landholders with an interest in biodiversity conservation in a rapidly changing world.

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Colloff, Matthew. Flooded Forest and Desert Creek. CSIRO Publishing, 2014. http://dx.doi.org/10.1071/9780643109209.

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The river red gum has the most widespread natural distribution of Eucalyptus in Australia, forming extensive forests and woodlands in south-eastern Australia and providing the structural and functional elements of important floodplain and wetland ecosystems. Along ephemeral creeks in the arid Centre it exists as narrow corridors, providing vital refugia for biodiversity. The tree has played a central role in the tension between economy, society and environment and has been the subject of enquiries over its conservation, use and management. Despite this, we know remarkably little about the ecology and life history of the river red gum: its longevity; how deep its roots go; what proportion of its seedlings survive to adulthood; and the diversity of organisms associated with it. More recently we have begun to move from a culture of exploitation of river red gum forests and woodlands to one of conservation and sustainable use. In Flooded Forest and Desert Creek, the author traces this shift through the rise of a collective environmental consciousness, in part articulated through the depiction of river red gums and inland floodplains in art, literature and the media.

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Buchteile zum Thema "Wetlands South Australia"

Denver, Kym. „Rehabilitating Wyndgate: Bringing Back Wetlands on a Family Property in South Australia“. In An International Perspective on Wetland Rehabilitation, 107–11. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4683-8_10.

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New, Tim R. „A Wetland Skipper on Sedges: Hesperilla flavescens“. In Butterfly Conservation in South-Eastern Australia: Progress and Prospects, 55–65. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9926-6_4.

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Meyers, Wayne M., Bouke de Jong und Françoise Portaels. „Buruli ulcer: Mycobacterium ulcerans infection“. In Oxford Textbook of Medicine, 848–50. Oxford University Press, 2010. http://dx.doi.org/10.1093/med/9780199204854.003.070628_update_002.

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CLOUT, HUGH. „Michael Williams 1935–2009“. In Proceedings of the British Academy, Volume 172, Biographical Memoirs of Fellows, X. British Academy, 2011. http://dx.doi.org/10.5871/bacad/9780197264904.003.0017.

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Michael Williams was an historical geographer and environmental historian who received international acclaim for his work on mankind's use of the wetlands, forests and other fragile resources. Born in Wales, his first appointment was at the University of Adelaide, South Australia, and then his subsequent career was in the Geography Department of the University of Oxford, based at Oriel College. Williams's book Americans and their Forests: an Historical Geography appeared in 1989 and was hugely influential in encouraging further research into deforestation. Deforesting the Earth: from Prehistory to Global Crisis, published in 2003, was considered his magnus opus. Williams was elected Fellow of the British Academy in 1989. Obituary by Hugh Clout FBA.

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„A geochemical approach to determining the hydrological regime of wetlands in a volcanic plain, south–eastern Australia“. In Groundwater and Ecosystems, 87–98. CRC Press, 2013. http://dx.doi.org/10.1201/b15003-12.

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de Jong, Bouke, Françoise Portaels und Wayne M. Meyers. „Buruli ulcer: Mycobacterium ulcerans infection“. In Oxford Textbook of Medicine, herausgegeben von Christopher P. Conlon, 1167–70. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198746690.003.0133.

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Buruli ulcer is caused by Mycobacterium ulcerans, which secretes a cytotoxic and immunosuppressive toxin, mycolactone. The disease is characterized by necrosis of skin, subcutaneous tissue, and bone, and is re-emerging as a potentially disabling affliction of inhabitants of tropical wetlands. Major foci are in West and Central Africa with an increasing focus in Australia, Mexico, South America, and Southeast Asia. It is not contagious; environmental sources include water, vegetation, and insects, with humans probably becoming infected by traumatic introduction of the bacillus into the skin from the overlying M. ulcerans-contaminated surface in most instances. Clinical presentation may be as a cutaneous nodule, undermined ulcer, plaque, or widely disseminated oedematous lesion. Clinical diagnosis is often accurate by experienced clinicians, and smears for acid-fast bacilli, culture, polymerase chain reaction assays, and histopathology are confirmatory. Treatment was formerly by wide surgical excision and skin grafting, yet antibiotics have now been found effective, including an all-oral regimen.

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„The Ecology and Management of Wood in World Rivers“. In The Ecology and Management of Wood in World Rivers, herausgegeben von TIMOTHY B. ABBE, ANDREW P. BROOKS und DAVID R. MONTGOMERY. American Fisheries Society, 2003. http://dx.doi.org/10.47886/9781888569568.ch20.

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<em>Abstract.</em>—Wood induces hydraulic, morphologic, and textural complexity into fluvial systems in forested regions around the world. Snags and logjams can create complex networks of channels and wetlands across entire river valleys and historically posed a significant obstacle to navigation. The clearing of wood from channels and riparian forest land reduced or eliminated the quantity and supply of wood into rivers in many regions of the world. Ecological restoration of fluvial environments increasingly includes the placement of wood. But few guidelines exist on appropriate methods for emulating natural wood accumulations, where and how to place wood, its longevity, the hydraulic and geomorphic consequences of wood, and how to manage systems where wood is reintroduced. Important factors to understand when placing wood in rivers include the watershed and reach-scale context of a project, the hydraulic and geomorphic effects of wood placements, possible changes in wood structures over time, and how it may impact human infrastructure and safety. Engineered logjams constructed in Washington, USA and New South Wales, Australia offer examples of how wood reintroduction can be engineered without the use of artificial anchoring to form stable instream structures as part of efforts to rehabilitate fluvial ecosystems and provide ecologically sensitive means to treat traditional problems such as bank stabilization and grade control.

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„from Halls Creek in the East Kimberley region and Derby in West Kimberley in 1960 had demonstrated that subclinical infections with both MVE and Kunjin viruses had occurred in the human population (Stanley and Choo, 1961; 1964), there had been no reported cases of Australian encephalitis in Western Australia or in the Northern Territory. Unfortunately no baseline studies were undertaken on either mosquito densities or virus incidence before the completion of stage one of the irrigation project; indeed no studies were initiated until completion of stage two, the construction of the Ord River dam. While the Ord River irrigation area undoubtedly had enormous and profound effects on the ecology of the region, most of the evidence for increases in mosquito densities and waterbird populations is circumstantial. The climate in the Kimberley and adjacent areas of the Northern Territory comprises a relatively short (four month) monsoonal wet season during which heavy rainfall events occur and the major rivers extend across vast floodplains, and a very dry ‘dry’ season during which most of the country becomes arid and, in the latter half, even large rivers cease to flow. Results from studies at various locations, such as Billiluna and Halls Creek, suggest that MVE virus is occasionally epizootic in many arid areas of the Kimberley. It is probable, therefore, that the area in which the Ord River irrigation area was established was similar and, consequently, that prior to the irrigation scheme being implemented, MVE was also epizootic. Since 1972, our studies in the Ord River irrigation area and elsewhere in the Kimberley region on virus isolations from mosquitoes, on serological investigations of humans, animals and sentinel chickens, and on human cases of Australian encephalitis, have clearly shown that MVE virus is now enzootic in the Ord River area and probably in other foci such as the Derby and Broome areas of the West Kimberley region. Elsewhere, in arid areas of the Kimberley and in the Pilbara, MVE virus is epizootic and virus activity is probably initiated either by virus reactivation from desiccation-resistant mosquito eggs or by introduction through viraemic vertebrate hosts. The situation in the Northern Territory is less clear as insufficient data have been accumulated. However, it is probable that MVE is enzootic in the wetlands in the north of the Northern Territory, but epizootic in the more arid areas further south extending east from the Kimberley border. Since 1978 there has been a substantial increase in the number of cases of Australian encephalitis throughout the Kimberley and Northern Territory that cannot be ascribed to either an increase in population or a heightened awareness among clinicians. Thus, although based largely on circumstantial evidence, we believe that the Ord River Irrigation Area has had a profound effect on MVE virus activity and indeed has resulted in the virus becoming enzootic in the area. We also believe that this large, stable enzootic focus has provided the source for regular epizootic incursions to other areas of the Kimberley and adjacent arid areas of the Northern Territory, and to the Pilbara, and has probably established smaller enzootic foci in the West Kimberley. As virus can persist in desiccation-resistant mosquito eggs, it is probable that most areas of the Kimberley and adjacent areas of the“. In Water Resources, 136. CRC Press, 1998. http://dx.doi.org/10.4324/9780203027851-27.

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Konferenzberichte zum Thema "Wetlands South Australia"

„Identification of the major hydrological threats for two clay pan wetlands in the south west of Australia“. In 19th International Congress on Modelling and Simulation. Modelling and Simulation Society of Australia and New Zealand (MSSANZ), Inc., 2011. http://dx.doi.org/10.36334/modsim.2011.i7.hanna.

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Berichte der Organisationen zum Thema "Wetlands South Australia"

Boyle, Maxwell, und Elizabeth Rico. Terrestrial vegetation monitoring at Fort Pulaski National Monument: 2019 data summary. National Park Service, Dezember 2021. http://dx.doi.org/10.36967/nrds-2288716.

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The Southeast Coast Network (SECN) conducts long-term terrestrial vegetation monitoring as part of the nationwide Inventory and Monitoring Program of the National Park Service (NPS). The vegetation community vital sign is one of the primary-tier resources identified by SECN park managers, and monitoring is currently conducted at 15 network parks (DeVivo et al. 2008). Monitoring plants and their associated communities over time allows for targeted understanding of ecosystems within the SECN geography, which provides managers information about the degree of change within their parks’ natural vegetation. 2019 marks the first year of conducting this monitoring effort on four SECN parks, including Fort Pulaski National Monument (FOPU). Twelve vegetation plots were established at Fort Pulaski National Monument in August. Data collected in each plot included species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree (greater than 10 centimeters [3.9 inches {in}]) diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass (i.e., fuel load) estimates. This report summarizes the baseline (year 1) terrestrial vegetation data collected at Fort Pulaski National Monument in 2019. Data were stratified across two dominant broadly defined habitats within the park (Maritime Tidal Wetlands and Maritime Upland Forests and Shrublands). Noteworthy findings include: Sixty-six vascular plant taxa were observed across 12 vegetation plots, including six taxa not previously known from the park. Plots were located on both Cockspur and McQueen’s Island. The most frequently encountered species in each broadly defined habitat included: Maritime Tidal Wetlands: smooth cordgrass (Spartina alterniflora), perennial saltmarsh aster(Symphyotrichum enuifolium), and groundsel tree (Baccharis halimifolia) Maritime Upland Forests and Shrublands: yaupon (Ilex vomitoria), southern/eastern red cedar (Juniperus silicicola + virginiana), and cabbage palmetto (Sabal palmetto). Four non-native species identified as invasive by the Georgia Exotic Pest Plant Council (GA-EPPC 2018) were found during this monitoring effort. These species (and their overall frequency of occurrence within all plots) included: Japanese honeysuckle (Lonicera japonica; 17%), bahiagrass (Paspalum notatum; 8%), Vasey’s grass (Paspalum urvillei; 8%), and European common reed (Phragmites australis; 8%). Two rare plants tracked by the Georgia Department of Natural Resources (GADNR 2013) were found during this monitoring effort. These include Florida wild privet (Forestiera segregata) and Bosc’s bluet (Oldenlandia boscii). Southern/eastern red cedar and cabbage palmetto were the most dominant species within the tree stratum of the maritime Upland Forest and Shrubland habitat type. Species that dominated the sapling and seedling strata of this type included yaupon, cabbage palmetto, groundsel tree, and Carolina laurel cherry (Prunus caroliniana). The health status of sugarberry (Celtis laevigata)—a typical canopy species in maritime forests of the South Atlantic Coastal Plain--observed on park plots appeared to be in decline, with most stems experiencing elevated levels of dieback and low vigor. Over the past decade, this species has been experiencing unexplained high rates of dieback and mortality throughout its range in the Southeastern United States; current research is focusing on what may be causing these alarming die-off patterns. Duff and litter made up the majority of downed woody biomass (fuel loads) across FOPU vegetation plots.

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