Modelling the effects of 'coastal' acidification on copper speciation

Richards, Russell, Chaloupka, Milani, Sano, Marcello and Tomlinson, Rodger (2011) Modelling the effects of 'coastal' acidification on copper speciation. Ecological Modelling, 222 19: 3559-3567. doi:10.1016/j.ecolmodel.2011.08.017


Author Richards, Russell
Chaloupka, Milani
Sano, Marcello
Tomlinson, Rodger
Title Modelling the effects of 'coastal' acidification on copper speciation
Journal name Ecological Modelling   Check publisher's open access policy
ISSN 0304-3800
1872-7026
Publication date 2011-10
Sub-type Article (original research)
DOI 10.1016/j.ecolmodel.2011.08.017
Volume 222
Issue 19
Start page 3559
End page 3567
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2012
Language eng
Formatted 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.
Keyword Ocean acidification
Copper speciation
Stochastic model
Coastal waters
Moreton Bay
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biological Sciences Publications
 
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