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Effects of transparent exopolymer particles and muddy terrigenous sediments on the survival of hard coral recruits

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dc.contributor Max Planck Inst Marine Microbiol
dc.contributor Helmholtz Association
dc.contributor Australian Institute Of Marine Science
dc.contributor Max Planck Society
dc.contributor Australian Inst Marine Sci
dc.contributor Alfred Wegener Institute, Helmholtz Centre For Polar & Marine Research
dc.contributor Alfred Wegener Inst Polar & Marine Res
dc.contributor Alfred Wegener Institute
dc.contributor Australian Institute Of Marine Science (aims) en ABELE, D FABRICIUS, KE WILD, C WOLANSKI, E 2017-03-21T01:28:14Z 2017-03-21T01:28:14Z 2013-02-28T06:54:16Z 2020-09-02T03:57:22Z 2017-03-21T01:28:14Z 2017-03-21T01:28:14Z 2013-02-28T06:54:16Z 2020-09-02T03:57:22Z 2003-07-01
dc.identifier 6532 en
dc.identifier.citation Fabricius KE, Wild C, Wolanski EJ and Abele D (2003) Effects of transparent exopolymer particles and muddy terrigenous sediments on the survival of hard coral recruits. Estuarine Coastal and Shelf Science. 57: 613-621. en
dc.identifier.issn 0272-7714
dc.description Link to abstract/full text - en
dc.description.abstract Sedimentation is a major cause of mortality in scleractinian coral recruits. In this study, we compared the effects of muddy coastal sediments, with and without enrichment by 'marine snow', on the survivorship of recruits of the hard coral Acropora willisae. Transparent exopolymer particles (TEP) were measured as characteristic components of marine snow using a staining method (Passow & Alldredge, Limnol. Oceangr. 40 (1995) 1326). Four-week-old recruits were exposed to: (1) muddy coastal sediments; (2) TER (3) TEP-enriched muddy coastal sediments; and (4) unfiltered sea water, for 43 h in aerated flow chambers. Thirty-three (-2) percent ( 5 SE) of coral recruits died after 43-h exposure to TEP-enriched muddy coastal sediments (similar to14mg cm(-2) sediments -2 enriched with 3.8 +/- 0.2 mug cm(-2) gum xanthan equivalents (GX) TEP). In contrast, no or minimal mortality was observed in the other three treatments. Mortality increased to >80% when the amount of deposited TEP was almost tripled (10.9 +/- 1.3 mug cm(-2) GX) and sediment increased by 50%. Thus, coral recruits survived short-term exposure to low levels of TEP and low levels of muddy sediments, but sediments enriched with TEP at concentrations recorded at some of the inshore stations proved to be detrimental. Concentrations of TEP were measured in the central Great Barrier Reef (latitude 16-18(degrees)S) in summer, the season of coral spawning and recruitment. Within < 10 km off the coast, TEP concentrations were high (mean=291 +/- 49 SE mug GX1(-1), range=152-791 mugGX 1(-1)). Concentrations declined with increasing distance from the coast, and averaged 83 ( 26 SE) mugGX1(-1) around oceanic reefs >40km off the coast. Our study suggests that both sediment composition and short-term (43h) sediment deposition affect survival of coral juveniles, which has implications for the capacity of inshore reefs to be recolonised by corals to recover from acute disturbance events. (C) 2003 Elsevier Science B.V. All rights reserved.
dc.description.uri en
dc.language en en
dc.language English
dc.relation.ispartof Null
dc.relation.ispartof Estuarine Coastal and Shelf Science - pages: 57: 613-621 en
dc.relation.uri en
dc.subject Sedimentation
dc.subject Mechanisms
dc.subject Great Barrier Reef
dc.subject Recolonisation
dc.subject Scleractinia
dc.subject Tep
dc.subject Marine Snow
dc.subject Zooxanthellae
dc.subject Oceanography
dc.subject Suspended Sediment
dc.subject Inshore Coral Reefs
dc.subject Recruitment
dc.subject Australian Scleractinian Corals
dc.subject Marine & Freshwater Biology
dc.subject Efficiency
dc.subject Flocculation
dc.subject Juvenile
dc.subject Papua-new-guinea
dc.subject Australia
dc.subject Aggregates Marine Snow
dc.subject Reef Organisms
dc.subject Transparent Exopolymer Particles
dc.title Effects of transparent exopolymer particles and muddy terrigenous sediments on the survival of hard coral recruits
dc.type journal article en
dc.identifier.doi 10.1016/S0272-7714(02)00400-6
dc.identifier.wos WOS:000184979400007

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