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Full-Text Articles in Physical Sciences and Mathematics
Larval Tolerance To Salinity In Three Species Of Australian Anuran: An Indication Of Saline Specialisation In Litoria Aurea, Brian D. Kearney, Phillip G. Byrne, Richard D. Reina
Larval Tolerance To Salinity In Three Species Of Australian Anuran: An Indication Of Saline Specialisation In Litoria Aurea, Brian D. Kearney, Phillip G. Byrne, Richard D. Reina
Faculty of Science - Papers (Archive)
Recent anthropogenic influences on freshwater habitats are forcing anuran populations to rapidly adapt to high magnitude changes in environmental conditions or face local extinction. We examined the effects of ecologically relevant elevated salinity levels on larval growth, metamorphosis and survival of three species of Australian anuran; the spotted marsh frog (Limnodynastes tasmaniensis), the painted burrowing frog (Neobatrachus sudelli) and the green and golden bell frog (Litoria aurea), in order to better understand the responses of these animals to environmental change. Elevated salinity (16% seawater) negatively impacted on the survival of L. tasmaniensis (35% survival) …
Effect Of Overlying Water Ph, Dissolved Oxygen, Salinity And Sediment Disturbances On Metal Release And Sequestration From Metal Contaminated Marine Sediments, Clare Atkinson, Dianne F. Jolley, Stuart L. Simpson
Effect Of Overlying Water Ph, Dissolved Oxygen, Salinity And Sediment Disturbances On Metal Release And Sequestration From Metal Contaminated Marine Sediments, Clare Atkinson, Dianne F. Jolley, Stuart L. Simpson
Faculty of Science - Papers (Archive)
Experiments were undertaken to examine the key variables affecting metal release and sequestration processes in marine sediments with metal concentrations in sediments reaching up to 86, 240, 700, and 3000mgkg1 (dry weight) for Cd, Cu, Pb and Zn, respectively. The metal release and sequestration rates were affected to a much greater extent by changes in overlying water pH (5.58.0) and sediment disturbance (by physical mixing) than by changes in dissolved oxygen concentration (38mgl1) or salinity (1545 practical salinity units). The physical disturbance of sediments was also found to release metals more rapidly than biological disturbance (bioturbation). The rate of oxidative …
Experimental Manipulation Of Shade, Silt, Nutrients And Salinity On The Temperate Reef Sponge Cymbastela Concentrica, D. E. Roberts, A. R. Davis, S. P. Cummins
Experimental Manipulation Of Shade, Silt, Nutrients And Salinity On The Temperate Reef Sponge Cymbastela Concentrica, D. E. Roberts, A. R. Davis, S. P. Cummins
Faculty of Science - Papers (Archive)
Discharge of sewage effluent into the ocean has been shown to cause changes in the structure and distribution of a range of biological assemblages, including those dominated by sponges. To date, the underlying mechanisms by which exposure to sewage alters such assemblages is unclear, although a number of potential models have been proposed. Here, a series of manipulative field experiments were done using the phototrophic spongeCymbastela concentrica. Hypotheses from the general models that increased shade, silt, nutrients or salinity gradients were tested to find a cause for observed declines in populations exposed to sewage. Changes in the variables …