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Effects of combined dredging-related stressors on sponges: a laboratory approach using realistic scenarios

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dc.contributor Aims
dc.contributor James Cook University
dc.contributor Univ Western Australia
dc.contributor James Cook Univ
dc.contributor Oceans Inst
dc.contributor University Of Western Australia
dc.contributor Sch Biol Sci
dc.contributor Ctr Microscopy Characterisat & Anal
dc.contributor Western Australian Marine Sci Inst WEBSTER, NICOLE S. PINEDA, MARI-CARMEN STREHLOW, BRIAN KAMP, JASMINE DUCKWORTH, ALAN JONES, ROSS 2017-08-06T18:56:09Z 2017-08-06T18:56:09Z 2019-10-21T21:53:30Z 2017-08-06T18:56:09Z 2017-08-06T18:56:09Z 2019-10-21T21:53:30Z 2017-07-12
dc.identifier.citation Pineda MC, Strehlow B, Kamp J, Duckworth A, Jones R, Webster NS (2017) Effects of combined dredging-related stressors on sponges: a laboratory approach using realistic scenarios. Scientific Reports 7: 5155
dc.identifier.issn 2045-2322
dc.description.abstract Dredging can cause increased suspended sediment concentrations (SSCs), light attenuation and sedimentation in marine communities. In order to determine the combined effects of dredging-related pressures on adult sponges, three species spanning different nutritional modes and morphologies were exposed to 5 treatment levels representing realistic dredging scenarios. Most sponges survived under low to moderate turbidity scenarios (SSCs of <= 33 mg L-1, and a daily light integral of >= 0.5 mol photons m(-2) d(-1)) for up to 28 d. However, under the highest turbidity scenario (76 mg L-1, 0.1 mol photons m(-2) d(-1)) there was 20% and 90% mortality of the phototrophic sponges Cliona orientalis and Carteriospongia foliascens respectively, and tissue regression in the heterotrophic Ianthella basta. All three sponge species exhibited mechanisms to effectively tolerate dredgingrelated pressures in the short term (e.g. oscula closure, mucus production and tissue regression), although reduced lipids and deterioration of sponge health suggest that longer term exposure to similar conditions is likely to result in higher mortality. These results suggest that the combination of high SSCs and low light availability can accelerate mortality, increasing the probability of biological effects, although there is considerable interspecies variability in how adult sponges respond to dredging pressures.
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 as environmental offsets and by co-investment from the WAMSI Joint Venture partners. 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. All collections were performed under Great Barrier Reef Marine Park Regulations 1983 (Commonwealth) and Marine Parks regulations 2006 (Queensland) Permit G12/35236.1 and Permit G13/35758.1. We are thankful to the crew of the San Miguel for helping with the sponge collection for this study. We also thank the staff at AIMS Marine Operations and AIMS National Sea Simulator for their technical assistance and expertise, to P Bessell-Browne and N Giofre for their time and efforts on the WAMSI tank prototyping and to M Sternel and E Arias for their valuable help in the field and while running the experiment. N.S.W was funded by an Australian Research Council Future Fellowship FT120100480.
dc.language English
dc.subject Environmental Impacts
dc.subject Great-barrier-reef
dc.subject Reef
dc.subject Cliona-orientalis Thiele
dc.subject Physiology
dc.subject Marine Sponges
dc.subject Multidisciplinary Sciences
dc.subject Ianthella-basta
dc.subject Diversity
dc.subject Mucus
dc.subject Sediment
dc.subject Geodia-barretti
dc.subject Corals
dc.subject Science & Technology - Other Topics
dc.title Effects of combined dredging-related stressors on sponges: a laboratory approach using realistic scenarios
dc.type journal article
dc.identifier.doi 10.1038/s41598-017-05251-x
dc.identifier.wos WOS:000405420600001

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