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Suspended sediments limit coral sperm availability

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dc.contributor Australian Institute Of Marine Science
dc.contributor University Of Western Australia
dc.contributor Western Australian Marine Sci Inst
dc.contributor Australian Res Ctr Excellence Coral Reef Studies
dc.contributor Ctr Microscopy Characterisat & Anal
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor Univ Western Australia
dc.contributor Australian Inst Marine Sci
dc.contributor Oceans Inst
dc.contributor.author NEGRI, ANDREW P.
dc.contributor.author RICARDO, GERARD F.
dc.contributor.author JONES, ROSS J.
dc.contributor.author CLODE, PETA L.
dc.contributor.author HUMANES, ADRIANA
dc.date.accessioned 2016-01-04T02:04:29Z
dc.date.accessioned 2017-03-21T01:06:01Z
dc.date.accessioned 2017-03-21T01:06:01Z
dc.date.accessioned 2019-07-08T02:23:50Z
dc.date.available 2016-01-04T02:04:29Z
dc.date.available 2017-03-21T01:06:01Z
dc.date.available 2017-03-21T01:06:01Z
dc.date.available 2019-07-08T02:23:50Z
dc.date.issued 2015-12-14
dc.identifier.citation Ricardo GF, Jones RJ, Clode PL, Humanes A, Negri AP (2015) Suspended sediments limit coral sperm availability. Scientific Reports 5: 18084 en_US
dc.identifier.issn 2045-2322
dc.identifier.uri http://epubs.aims.gov.au/11068/11462
dc.description.abstract Suspended sediment from dredging activities and natural resuspension events represent a risk to the reproductive processes of coral, and therefore the ongoing maintenance of reefal populations. To investigate the underlying mechanisms that could reduce the fertilisation success in turbid water, we conducted several experiments exposing gametes of the corals Acropora tenuis and A. millepora to two sediment types. Sperm limitation was identified in the presence of siliciclastic sediment (230 and similar to 700 mg L-1), with 2-37 fold more sperm required to achieve maximum fertilisation rates, when compared with sediment-free treatments. This effect was more pronounced at sub-optimum sperm concentrations. Considerable (>45%) decreases in sperm concentration at the water's surface was recorded in the presence of siliciclastic sediment and a >20% decrease for carbonate sediment. Electron microscopy then confirmed sediment entangled sperm and we propose entrapment and sinking is the primary mechanism reducing sperm available to the egg. Longer exposure to suspended sediments and gamete aging further decreased fertilisation success when compared with a shorter exposure. Collectively, these findings demonstrate that high concentrations of suspended sediments effectively remove sperm from the water's surface during coral spawning events, reducing the window for fertilisation with potential subsequent flow-on effects for recruitment.
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, BHP Billiton. This research was also enabled by data and information provided by Chevron Australia. The commercial entities had no role in data analysis, decision to publish, or preparation of the manuscript. G.F.R was supported by an Australian Postgraduate Award and UWA Safety-Net Top-Up 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. This work was made possible from the assistance of Mikaela Nordborg, Natalie Giofre, Pia Bessel-Browne, Brian Strehlow, Julia Brandes, Katrina Bromhall, and Sarah Pannhausen. We thank the staff at the AIMS National Sea Simulator for their expertise and assistance.
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, BHP Billiton. This research was also enabled by data and information provided by Chevron Australia. G.F.R was supported by an Australian Postgraduate Award and UWA Safety-Net Top-Up Scholarship. en_US
dc.description.uri http://www.nature.com/articles/srep18084 en_US
dc.language English
dc.language.iso en en_US
dc.publisher Nature OPEN en_US
dc.relation.ispartof Null
dc.rights Attribution 3.0 Australia *
dc.rights.uri http://creativecommons.org/licenses/by/3.0/au/ *
dc.subject Terrestrial
dc.subject Dynamics
dc.subject Environmental Impacts
dc.subject Ecology
dc.subject Science & Technology - Other Topics
dc.subject Multidisciplinary Sciences
dc.subject Australia
dc.subject Responses
dc.subject Fertilization Success
dc.subject Reef Corals
dc.subject Scleractinian Coral
dc.subject Acropora-millepora Ehrenberg
dc.title Suspended sediments limit coral sperm availability
dc.type journal article en_US
dc.identifier.doi 10.1038/srep18084
dc.identifier.wos WOS:000366287700001


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