Modelling the effects of ‘coastal’ acidification on copper speciation

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Title Modelling the effects of ‘coastal’ acidification on copper speciation
Author Richards, Russell; Chaloupka, Milani; Sano, Marcello; Tomlinson, Rodger Benson
Journal Name Ecological Modelling
Year Published 2011
Place of publication Netherlands
Publisher Elsevier BV
Abstract We present here a copper speciation model that accounts for the long-term (‘coastal-acidification’) and short-term (daily and seasonal variation) variability in water pH and water temperature. The developed model is applied to a sub-tropical estuary (Moreton Bay, Australia) at a one hundred year time scale so that outputs are consistent with climate change projections. The model predicts that the mean cupric ion concentration (Cu2+) in the estuary will increase by 115% over the next 100 years as a result of the projected decrease in pH and increase in water temperature. Through calibration, the estimated concentration of copper-complexing dissolved organic matter (DOM) in the estuary is found to be 22.5 nM. An increase in the concentration of Cu2+, which is the most toxic and bioavailable form of copper, has implications for ecosystem health and may have a negative effect on the detoxifying capacity of DOM. Models that provide a framework for coupling biological, chemical and physical processes are important for providing a holistic perspective of coastal systems, especially for better understanding a system within the context of climatic and non-climatic drivers.
Peer Reviewed Yes
Published Yes
Alternative URI
Volume 222
Issue Number 19
Page from 3559
Page to 3567
ISSN 0304-3800
Date Accessioned 2011-10-03; 2012-02-14T05:33:29Z
Research Centre Griffith Centre for Coastal Management
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Climate Change Processes; Ecological Impacts of Climate Change
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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