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Full-Text Articles in Social and Behavioral Sciences
Late-Holocene Climatic Variability Indicated By Three Natural Archives In Arid Southern Australia, Luke A. Gliganic, Timothy J. Cohen, Jan-Hendrik May, John D. Jansen, Gerald C. Nanson, Anthony Dosseto, Joshua R. Larsen, Maxime Aubert
Late-Holocene Climatic Variability Indicated By Three Natural Archives In Arid Southern Australia, Luke A. Gliganic, Timothy J. Cohen, Jan-Hendrik May, John D. Jansen, Gerald C. Nanson, Anthony Dosseto, Joshua R. Larsen, Maxime Aubert
Faculty of Science, Medicine and Health - Papers: part A
Three terrestrial climate proxies are used to investigate the evolution of Holocene palaeoenvironments in southern central Australia, all of which present a coherent record of palaeohydrology. Single-grain optically stimulated luminescence from sediments supplemented by 14C from charcoal and lacustrine shells was obtained to date shoreline deposits (Lake Callabonna) and the adjacent Mt Chambers Creek alluvial fan. Our findings are complemented by a U/Th-based record of speleothem growth in the Mt Chambers Creek catchment, which we interpret to reflect increased precipitation. Together, these archives shed light on the timing of, and possible sources of water for, Holocene pluvial intervals. We identified …
Patterns Of Genotypic Diversity Suggest A Long History Of Clonality And Population Isolation In The Australian Arid Zone Shrub Acacia Carneorum, Eleanor K. O'Brien, Andrew J. Denham, David J. Ayre
Patterns Of Genotypic Diversity Suggest A Long History Of Clonality And Population Isolation In The Australian Arid Zone Shrub Acacia Carneorum, Eleanor K. O'Brien, Andrew J. Denham, David J. Ayre
Faculty of Science, Medicine and Health - Papers: part A
For plants capable of both sexual and clonal reproduction, the relative frequency of these reproductive modes is influenced by genetic and ecological factors. Acacia carneorum is a threatened shrub from the Australian arid zone that occurs as a set of small, spatially isolated populations. Sexual reproduction appears to be very rare: despite regular flowering, only two populations set seed. It is not known whether this reflects an ancient pattern, or results from rapid land use changes following arrival of Europeans in the region 150 years ago. We assessed genotypic variation throughout the range of A. carneorum using AFLP markers, to …