Assessing the additive risks of PSII herbicide exposure to the Great Barrier Reef

Lewis, Stephen E., Schaffelke, Britta, Shaw, Melanie, Bainbridge, Zoë T., Rohde, Ken W., Kennedy, Karen, Davis, Aaron M., Masters, Bronwyn L., Devlin, Michelle J., Mueller, Jochen F., and Brodie, Jon E. (2012) Assessing the additive risks of PSII herbicide exposure to the Great Barrier Reef. Marine Pollution Bulletin, 65 (4-9). pp. 280-291.

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Abstract

Herbicide residues have been measured in the Great Barrier Reef lagoon at concentrations which have the potential to harm marine plant communities. Monitoring on the Great Barrier Reef lagoon following wet season discharge show that 80% of the time when herbicides are detected, more than one are present. These herbicides have been shown to act in an additive manner with regards to photosystem-II inhibition. In this study, the area of the Great Barrier Reef considered to be at risk from herbicides is compared when exposures are considered for each herbicide individually and also for herbicide mixtures. Two normalisation indices for herbicide mixtures were calculated based on current guidelines and PSII inhibition thresholds. The results show that the area of risk for most regions is greatly increased under the proposed additive PSII inhibition threshold and that the resilience of this important ecosystem could be reduced by exposure to these herbicides.

Item ID: 20966
Item Type: Article (Refereed Research - C1)
Keywords: Great Barrier Reef, photosystem II herbicides, additive risk, risk assessment, mixture toxicity, toxicity index
Additional Information:

960507 Ecosystem Assessment and Management of Marine Environments (on JCU website) 960506 Ecosystem Assessment and Management of Marine Environments (have had to use in repository as suggested by Tove)

ISSN: 1879-3363
Date Deposited: 14 Mar 2012 04:16
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%
Citation Count from Web of Science Web of Science 2
Downloads: Total: 3
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