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Sediment characteristics influence the fertilisation success of the corals Acropora tenuis and Acropora millepora

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dc.contributor Univ Western Australia
dc.contributor Australian Inst Marine Sci
dc.contributor Uwa Oceans Inst
dc.contributor Australian Institute Of Marine Science
dc.contributor Ctr Microscopy Characterisat & Anal
dc.contributor Coll Sci & Engn
dc.contributor University Of Western Australia
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor Aims Jcu
dc.contributor Arc Ctr Excellence Coral Reef Studies
dc.contributor Western Australian Marine Sci Inst
dc.contributor Div Res & Innovat GIOFRE, NATALIE RICARDO, GERARD F. CLODE, PETA L. HUMANES, ADRIANA NEGRI, ANDREW P. JONES, ROSS J. 2018-11-18T18:13:09Z 2018-11-18T18:13:09Z 2019-05-09T01:25:09Z 2018-11-18T18:13:09Z 2018-11-18T18:13:09Z 2019-05-09T01:25:09Z 2018-10-01
dc.identifier.citation Ricardo GF, Jones RJ, Clode PL, Humanes A, Giofre N, Negri AP (2018) Sediment characteristics influence the fertilisation success of the corals Acropora tenuis and Acropora millepora. Marine Pollution Bulletin135: 941-953
dc.identifier.issn 0025-326X
dc.description.abstract Elevated suspended sediment concentrations (SSCs) often impact coral fertilisation success, but sediment composition can influence effect thresholds, which is problematic for accurately predicting risk. Here, we derived concentration-response thresholds and cause-effect pathways for SSCs comprising a range of realistic mineral and organic compositions on coral fertilisation success. Effect concentration thresholds (EC10: 10% fertilisation inhibition) varied markedly, with fertilisation highly sensitive to inshore organic-clay rich sediments and bentonite clay at < 5 mg L-1. Mineral clays and organic matter within these sediments likely promoted flocculation of the coral sperm, which in turn reduced fertilisation. In contrast, sediments lacking these properties bound less sperm, leading to higher SSC thresholds for coral fertilisation (EC10 > 40 mg L-1). The effect thresholds for relevant sediment types were combined with in situ turbidity data from locations near dredging operations to assess the risks posed by dredging to coral fertilisation at these locations.
dc.description.sponsorship This research was funded by the Western Australian Marine Science Institution (WAMSI) as part of the WAMSI Dredging Science Node, and made possible through investment from Chevron Australia, Woodside Energy Limited and BHP Billiton as environmental offsets and by co-investment from the WAMSI Joint Venture partners. This research was enabled by data and information provided by Chevron. The commercial entities had no role in data analysis, decision to publish, or preparation of the manuscript. The views expressed herein are those of the authors and not necessarily those of WAMSI. This project is also supported through funding from the Australian Governments National Environmental Science Program. G.F.R was supported by a Research Training Program (RTP) Stipend Scholarship. We acknowledge the facilities, and the scientific and technical assistance of the Australian Microscopy & Microanalysis Research Facility at the Centre for Microscopy, Characterisation & Analysis, The University of Western Australia, a facility funded by the University, State and Commonwealth Governments. We thank Alan Duckworth for assistance with the initial sediment processing, Rachael Macdonald and Rebecca Fisher and for providing and collating the in situ turbidity data, and Dr. Chris Doropoulos and Dr. James Guest for comments on the manuscript. This work was made possible from the assistance of Florita Flores, Mikaela Nordborg, Pia Bessel-Browne, and a number of volunteers. We thank the staff at the AIMS National Sea Simulator for their expertise and assistance.
dc.language English
dc.subject Great-barrier-reef
dc.subject Coastal Waters
dc.subject Transparent Exopolymer Particles
dc.subject Marine-sediments
dc.subject Water-quality
dc.subject Australia
dc.subject Flocculation
dc.subject Environmental Sciences & Ecology
dc.subject Guidelines
dc.subject Flood-plume
dc.subject Environmental Sciences
dc.subject Suspended Sediments
dc.subject Marine & Freshwater Biology
dc.subject Risk Assessment
dc.subject Clay-minerals
dc.subject Nutrients
dc.subject Scleractinian Coral
dc.subject Terrestrial
dc.subject Coral Fertilisation
dc.title Sediment characteristics influence the fertilisation success of the corals Acropora tenuis and Acropora millepora
dc.type journal article
dc.identifier.doi 10.1016/j.marpolbul.2018.08.001
dc.identifier.wos WOS:000448094200103

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