An assessment of an environmental gradient using coral geochemical records, Whitsunday Islands, Great Barrier Reef, Australia
Lewis, S.E., Brodie, J.E., McCulloch, M.T., Mallella, J., Jupiter, S.D., Williams, H. Stuart, Lough, J.M., and Matson, E.G. (2012) An assessment of an environmental gradient using coral geochemical records, Whitsunday Islands, Great Barrier Reef, Australia. Marine Pollution Bulletin, 65 (4-9). pp. 306-319.
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Coral cores were collected along an environmental and water quality gradient through the Whitsunday Island group, Great Barrier Reef (Australia), for trace element and stable isotope analysis. The primary aim of the study was to examine if this gradient could be detected in coral records and, if so, whether the gradient has changed over time with changing land use in the adjacent river catchments. Y/Ca was the trace element ratio which varied spatially across the gradient, with concentrations progressively decreasing away from the river mouths. The Ba/Ca and Y/Ca ratios were the only indicators of change in the gradient through time, increasing shortly after European settlement. The Mn/Ca ratio responded to local disturbance related to the construction of tourism infrastructure. Nitrogen isotope ratios showed no apparent trend over time. This study highlights the importance of site selection when using coral records to record regional environmental signals.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||Ba/Ca, Mn/Ca, Y/Ca, d15N, Great Barrier Reef, water quality gradient|
|FoR Codes:||05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050204 Environmental Impact Assessment @ 50%|
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050209 Natural Resource Management @ 50%
|SEO Codes:||96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960506 Ecosystem Assessment and Management of Fresh, Ground and Surface Water Environments @ 50%|
96 ENVIRONMENT > 9609 Land and Water Management > 960905 Farmland, Arable Cropland and Permanent Cropland Water Management @ 50%
|Deposited On:||15 Mar 2012 16:50|
|Last Modified:||18 Oct 2013 01:27|
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