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Impact Of Ocean Warming And Ocean Acidification On Larval Development And Calcification In The Sea Urchin Tripneustes Gratilla, Hannah Sheppard Brennand, Natalie Soars, Symon A. Dworjanyn, Andrew R. Davis, Maria Byrne

Faculty of Science - Papers (Archive)

Background: As the oceans simultaneously warm, acidify and increase in P-CO2, prospects for marine biota are of concern. Calcifying species may find it difficult to produce their skeleton because ocean acidification decreases calcium carbonate saturation and accompanying hypercapnia suppresses metabolism. However, this may be buffered by enhanced growth and metabolism due to warming.Methodology/Principal Findings: We examined the interactive effects of near-future ocean warming and increased acidification/P-CO2 on larval development in the tropical sea urchin Tripneustes gratilla. Larvae were reared in multifactorial experiments in flow-through conditions in all combinations of three temperature and three pH/P-CO2 treatments. Experiments were placed in the …

Impact Of A Chytrid-Related Mortality Event On A Population Of The Green And Golden Bell Frog Litoria Aurea, Trent D. Penman, G Muir, E Magarey, E Burns

Faculty of Science - Papers (Archive)

Chytridiomycosis is considered a key threatening process under Commonwealth legislation. Little is known of the impact of this pathogen within wild populations. The Green and Golden Bell Frog Litoria aurea is a threatened species that is thought to be affected by this disease. Here we present an example of a chytrid related mortality event within an apparently healthy population of this species. The individuals were found to be carrying chytrid and we suggest that this was the proximal cause of mortality. Monitoring was conducted across Sydney Olympic Park between 1998 and 2005. In a small group of ponds in 1999, …

Impact Of Data Uncertainty On The Spatio-Temporal Distribution Of Australian Cyclones, 1906-2006, Marjetta L. Puotinen

Faculty of Science - Papers (Archive)

Tropical cyclones (known elsewhere as hurricanes or typhoons) regularly track through Australia’s northern coastal regions (Figure 1).

Data documenting the basic characteristics of cyclones in the Australian region is available from the Bureau of Meteorology (BOM) as early as 1906. This data set (freely available in ASCII format at http://www.bom.gov.au) records some 41 attributes (most of which are not complete for the entire time series) for 22,645 individual cyclone eye positions. Because cyclones can cause considerable impact to both marine and terrestrial environments, data sets such as this are widely used to reconstruct past cyclone conditions (for example, see Berz …