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Herbicides increase the vulnerability of corals to rising sea surface temperature

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dc.contributor Australian Institute Of Marine Science
dc.contributor Australian Inst Marine Sci
dc.contributor Australian Institute Of Marine Science (aims) en UTHICKE, SVEN NEGRI, ANDREW P. FLORES, FLORITA ROETHIG, TILL 2017-03-21T01:23:53Z 2017-03-21T01:23:53Z 2013-02-28T06:51:30Z 2019-07-08T02:15:02Z 2013-02-28T06:51:30Z 2017-03-21T01:23:53Z 2013-02-28T06:51:30Z 2019-07-08T02:15:02Z 2011-03-01
dc.identifier 8706 en
dc.identifier.citation Negri AP, Flores F, Rothig T and Uthicke S (2011) Herbicides increase the vulnerability of corals to rising sea surface temperature. Limnology and Oceanography. 56: 471-485. en
dc.identifier.issn 0024-3590
dc.description Link to abstract/full text - en
dc.description.abstract In order to examine the potential interactive pressures of local pollution and global climate change, we exposed corals and crustose coralline algae (CCA) to three agricultural photosystem II (PSII) herbicides at four temperatures (26-32 degrees C). The coral Acropora millepora was 3- to 10-fold more sensitive to the three herbicides than the CCA Neogoniolithon fosliei. While the photosynthesis of CCA was not affected by the herbicide concentrations used (< 1 mu g L-1), temperatures of 31 degrees C and 32 degrees C alone significantly inhibited photosynthetic efficiency (Delta F: F-m') and caused chronic photoinhibition (reduced F-v : F-m) and substantial bleaching. Environmentally relevant concentrations of each herbicide increased the negative effects of thermal stress on coral at 31 degrees C and 32 degrees C. Mixed model analyses of variance showed that the effects of elevated sea surface temperatures (SST) and herbicide on photosynthetic efficiency of coral symbionts were additive. Furthermore, the effect of either diuron or atrazine in combination with higher SST (31 degrees C and 32 degrees C) on chronic photoinhibition was distinctly greater than additive (synergistic). Reducing the herbicide concentration by 1 mu g L-1 diuron above 30 degrees C would protect photosynthetic efficiency by the equivalent of 1.8 degrees C and reduce chronic photoinhibition by the equivalent of a 1 degrees C reduction. Reduced water quality increases the vulnerability of corals to elevated SSTs, and effective management of local water quality can reduce negative effects of global stressors such as elevated SST.
dc.description.sponsorship We thank Joost van Dam (Australian Institute of Marine Science) for assistance in the field and laboratory and Jochen Mueller (National Research Centre for Environmental Toxicology, University of Queensland) for helpful discussions. We also thank two anonymous reviewers for their comments, which have improved this article. This research was partly funded by the Australian Government's Marine and Tropical Sciences Research Facility (MTSRF).
dc.description.uri en
dc.language English
dc.language en en
dc.relation.ispartof Null
dc.relation.ispartof Limnology and Oceanography - pages: 56: 471-485 en
dc.relation.isreferencedby Link to Metadata Record - en
dc.relation.uri en
dc.subject Great-barrier-reef
dc.subject Photosystem-ii
dc.subject Algae
dc.subject Diuron
dc.subject Climate-change
dc.subject Chlorophyll Fluorescence
dc.subject Limnology
dc.subject Photoinhibition
dc.subject Marine & Freshwater Biology
dc.subject Zooxanthellae
dc.subject Oceanography
dc.subject Ocean Acidification
dc.subject Porites-cylindrica
dc.title Herbicides increase the vulnerability of corals to rising sea surface temperature
dc.type journal article en
dc.identifier.doi 10.4319/lo.2011.56.2.0471
dc.identifier.wos WOS:000290677800005

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