Contribution of individual rivers to Great Barrier Reef nitrogen exposure with implications for management prioritization

Marine Pollution Bulletin
Wolff, Nicholas H.; da Silva, Eduardo Teixeira; Devlin, Michelle; Anthony, Kenneth R.N.; Lewis, Stephen; Tonin, Hemmerson; Brinkman, Richard; Mumby, Peter J.
Source N/A
Volume / IssueVolume 133
Total Pages13 pages
Article Link
Editor(s) N/A
Conference / Book Title N/A
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Tagswater quality; river pollution; nutrients; coral health; decision support; prioritization
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Conference Date N/A
Publication DateMay 25, 2018
Article Date N/A
GS Citation N/A
AbstractDissolved inorganic nitrogen (DIN) runoff from Great Barrier Reef (GBR) catchments is a threat to coral reef health. Several initiatives address this threat, including the Australian Government's Reef 2050 Plan. However, environmental decision makers face an unsolved prioritization challenge: determining the exposure of reefs to DIN from individual rivers. Here, we use virtual river tracers embedded within a GBR-wide hydrodynamic model to resolve the spatial and temporal dynamics of 16 individual river plumes during three wet seasons (2011−2013). We then used in-situ DIN observations to calibrate tracer values, allowing us to estimate the contribution of each river to reef-scale DIN exposure during each season. Results indicate that the Burdekin, Fitzroy, Tully and Daintree rivers pose the greatest DIN exposure risk to coral reefs during the three seasons examined. Results were used to demonstrate a decision support framework that combines reef exposure risk with river dominance (threat diversity).
Created: 7/30/2018 10:32 AM (ET)
Modified: 7/31/2018 10:28 AM (ET)
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