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Climate change doubles sedimentation-induced coral recruit mortality

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dc.contributor Australian Res Council Ctr Excellence Coral Reef
dc.contributor James Cook University
dc.contributor Sch Marine & Trop Biol
dc.contributor Aims Jcu
dc.contributor Australian Institute Of Marine Science
dc.contributor James Cook Univ
dc.contributor Australian Inst Marine Sci NEGRI, ANDREW P. RICARDO, GERARD F. BRUNNER, CHRISTOPHER A. UTHICKE, SVEN HOOGENBOOM, MIA O. 2021-04-11T18:55:39Z 2021-04-11T18:55:39Z 2021-04-19T05:26:36Z 2021-04-11T18:55:39Z 2021-04-11T18:55:39Z 2021-04-19T05:26:36Z 2021-05-10
dc.identifier.citation Brunner CA, Uthicke S, Ricardo GF, Hoogenboom MO, Negri AP (2021) Climate change doubles sedimentation-induced coral recruit mortality. Science of the Total Environment 768:143897
dc.identifier.issn 0048-9697
dc.description.abstract Coral reef replenishment is threatened by global climate change and local water-quality degradation, including smothering of coral recruits by sediments generated by anthropogenic activities. Here we show that the ability of Acropora millepora recruits to remove sediments diminishes under future climate conditions, leading to increased mortality. Recruits raised under future climate scenarios for fourteen weeks (highest treatment: +1.2 degrees C, pCO(2): 950 ppm) showed twofold higher mortality following repeated sediment deposition (50% lethal sediment concentration LC50: 14-24 mg cm(-2)) compared to recruits raised under current climate conditions (LC50: 37-51 mg cm(-2)), depending on recruit age at the time of sedimentation. Older and larger recruits were more resistant to sedimentation and only ten-week-old recruits grown under current climate conditions survived sediment loads possible during dredging operations. This demonstrates that water-quality guidelines for managing sediment concentrations will need to be climate-adjusted to protect future coral recruitment. (C) 2020 The Authors. Published by Elsevier B.V.
dc.description.sponsorship This research was supported by AIMS@JCU and the Australian Government's National Environmental Science Program (NESP) TropicalWater Quality Hub project 5.2.
dc.language English
dc.subject Runoff
dc.subject Environmental Sciences
dc.subject Environmental Sciences & Ecology
dc.subject Survival Threshold
dc.subject Sediment
dc.subject Dredging
dc.subject Water Quality
dc.subject Recruitment
dc.title Climate change doubles sedimentation-induced coral recruit mortality
dc.type journal article
dc.identifier.doi 10.1016/j.scitotenv.2020.143897
dc.identifier.wos WOS:000625384700001

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