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Articles 1 - 8 of 8
Full-Text Articles in Life Sciences
The Ecology And Behaviour Of Varanus Mertensi (Reptilia: Varanidae), Phillip J. Mayes
The Ecology And Behaviour Of Varanus Mertensi (Reptilia: Varanidae), Phillip J. Mayes
Theses: Doctorates and Masters
This study examines numerous aspects of the ecology and behaviour of Merten's Water Monitor, Varanus mertensi (Reptilia: Varanidae) including; daily behaviour, diet, foraging behaviour, reproductive seasonality and daily and long-term movements. Findings from over two years of field study of V. mertensi found in waterbodies of both the Ord River Irrigation Scheme and surrounding East Kimberley/Victoria River Downs bioregion of Western Australia are presented. This study simultaneously broadens our understanding of the family Varanidae and provides insight into the life of a semi-aquatic faunal species found in waterbodies of the Ord River Irrigation Scheme.
The Influence Of Seabird-Derived Nutrients On Island Ecosystems In The Oligotrophic Marine Waters Of South-Western Australia, Sofie A. Harrison
The Influence Of Seabird-Derived Nutrients On Island Ecosystems In The Oligotrophic Marine Waters Of South-Western Australia, Sofie A. Harrison
Theses: Doctorates and Masters
Nutrient inputs from productive marine environments have been shown to directly and indirectly subsidise primary producers and consumers in terrestrial ecosystems (e.g. Polis and Hurd 1995; 1996; Anderson and Polis 1998; 1999). But does this theory hold true on islands surrounded by oligotrophic waters, which account for a significant proportion of the marine environment? The aim of the present study was to examine the applicability of the spatial subsidisation hypotheses proposed by Polis and his co-authors to an oligotrophic system in south-western region of Western Australia. These aims were achieved by comparing soil and plant nutrients, and the nitrogen stable …
Soil Community Structure And Litter Decomposition Under Irrigated Eucalyptus Globulus In South Western Australia, Derek J. Swarts
Soil Community Structure And Litter Decomposition Under Irrigated Eucalyptus Globulus In South Western Australia, Derek J. Swarts
Theses: Doctorates and Masters
Plantations provide a range of benefits, including the potential to ameliorate salinity and soil erosion, enhance biodiversity, and provide timber and wood chips. They are increasingly important because of their role in carbon sequestration (Adolphson, 2000; Anonymous, 2005; Jones et al. , 2005; Kozlowski, 2002; Paul and Polglase, 2004). Recent research has highlighted the connection between plantation health and soil fertility (Johnston and Crossley Jr, 2002). Within an Australian context there is little published data on the composition of the soil and litter fauna and their contribution to litter decomposition under plantation systems (Adolphson, 2000). The Albany Effluent Irrigated Tree …
Drying And Re-Wetting Of Organic Wetland Sediments: Biogeochemistry And Implications For Wetland Management, Beate Sommer
Drying And Re-Wetting Of Organic Wetland Sediments: Biogeochemistry And Implications For Wetland Management, Beate Sommer
Theses: Doctorates and Masters
In the past decade, increasing instances of eutrophication and acidification of wetlands on the Swan Coastal Plain (SCP), Western Australia, and particularly on the Gnangara groundwater mound, have coincided with gradually decreasing ground- and surface water levels. The processes involved in determining whether a wetland will acidify or become eutrophic (or both) as a result of drawdown are still poorly understood, especially on the SCP where there are strong links between wetland water quality and underlying geomorphology. For instance, many of the wetlands located on the wellbuffered geomorphic unit called the Spearwood dunes are eutrophic due to high nutrient loads, …
Reintroduction Ecology Of Mala (Lagorchestes Hirsutus) And Merrnine (Lagostrophus Fasciatus) At Shark Bay, Western Australia, Blair Hardman
Reintroduction Ecology Of Mala (Lagorchestes Hirsutus) And Merrnine (Lagostrophus Fasciatus) At Shark Bay, Western Australia, Blair Hardman
Theses: Doctorates and Masters
The transfer of threatened animals from one location to another in order to benefit the species is a technique frequently used by animal conservation managers. However, very few of these relocations have experimentally assessed the relative merits and disadvantages of commonly used release techniques. Two species of hare-wallaby, mala (Lagorchestes hirsutus) and merrnine (Lagostrophus fasciatus), were reintroduced in August 2001 onto Peron Peninsula in Western Australia. These threatened species were reintroduced using two release strategies (soft versus hard release), and their subsequent movements and body condition were monitored using radio-telemetry and trapping.
A Comparison Of Logging And Fire Disturbance On Biophysical Attributes Of The Northern Jarrah Forest, Alexander W. Watson
A Comparison Of Logging And Fire Disturbance On Biophysical Attributes Of The Northern Jarrah Forest, Alexander W. Watson
Theses: Doctorates and Masters
Ecologically sustainable forest management (ESFM) serves dual purposes: 1) to ensure the conservation of biodiversity, and 2) in production forest (forest managed for the production of timber and woodchips), to maintain an economically viable timber industry in perpetuity. A central axiom of ESFM is that any manipulation of a forest ecosystem should emulate the `natural' disturbance patterns of the forest. This is based on the assumption that forest communities have evolved with endogenous disturbance regimes and will be better able to cope if exogenous disturbance (e.g., logging) remains within natural levels and spatial and temporal bounds of intensity. The objective …
Movement Patterns And Habitat Usage Of Shark Bay Dugongs, David K. Holley
Movement Patterns And Habitat Usage Of Shark Bay Dugongs, David K. Holley
Theses: Doctorates and Masters
In order to define small and large scale spatial and temporal individual movement patterns of dugongs (Dugong dugon) within the Shark Bay World Heritage Property (SBWHP) a total of 19 dugongs were fitted with remote location recording and transmitting devices. Combined locations from all units totalled over 10,000 locations. This spatial and temporal data was used to define movement patterns of dugongs within Shark Bay as well as areas of high use deemed to be indicative of foraging activity. Platform Transmitting Terminals (PTT?s) using the ARGOS location collection system tracked animals over large temporal scales with 4 animals tracked up …
Detached Macrophyte Accumulations In Surf Zones: Significance Of Macrophyte Type And Volume In Supporting Secondary Production, Karen Ruth Crawley
Detached Macrophyte Accumulations In Surf Zones: Significance Of Macrophyte Type And Volume In Supporting Secondary Production, Karen Ruth Crawley
Theses: Doctorates and Masters
Detached macrophytes (sea grass and macroalgae) are transported from more offshore areas and accumulate in large volumes in surf zones, where they are commonly called wrack. In coastal regions in other parts of the world, wrack transported from one habitat to a second habitat can be considered as a "spatial subsidy" for the recipient habitat with significant consequences for community dynamics and food webs. The primary aim of this study was to determine the significance of the different components of wrack (i.e. sea grass and brown, red and green algae) as a direct and indirect food source and habitat for …