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Symbiodinium Community Composition in Scleractinian Corals Is Not Affected by Life-Long Exposure to Elevated Carbon Dioxide

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dc.contributor Australian Inst Marine Sci
dc.contributor Australian Institute Of Marine Science HUMPHREY, CRAIG NOONAN, SAM H. C. FABRICIUS, KATHARINA E. 2017-03-21T00:55:02Z 2017-03-21T00:55:02Z 2013-06-27T23:09:38Z 2019-10-21T21:36:50Z 2017-03-21T00:55:02Z 2017-03-21T00:55:02Z 2013-06-27T23:09:38Z 2019-10-21T21:36:50Z 2013-05-22
dc.identifier.citation Noonan SHC, Fabricius KE, Humphrey C (2013) Symbiodinium community composition in Scleractinian corals is not affected by life-long exposure to elevated carbon dioxide. PLoS ONE 8(5): e63985 en_US
dc.identifier.issn 1932-6203
dc.description.abstract Ocean acidification (OA) is expected to negatively affect coral reefs, however little is known about how OA will change the coral-algal symbiosis on which reefs ultimately depend. This study investigated whether there would be differences in coral Symbiodinium types in response to OA, potentially improving coral performance. We used denaturing gradient gel electrophoresis (DGGE) of the internal transcribed spacer 2 (ITS2) region of ribosomal DNA to investigate the dominant types of Symbiodinium associating with six species of scleractinian coral that were exposed to elevated partial pressures of carbon dioxide (pCO(2)) in situ from settlement and throughout their lives. The study was conducted at three naturally occurring volcanic CO2 seeps (pCO(2)similar to 500 to 900 ppm, pH(Total) 7.8-7.9) and adjacent control areas (pCO(2) similar to 390 ppm, pH(Total) similar to 8.0-8.05) in Papua New Guinea. The Symbiodinium associated with corals living in an extreme seep site (pCO(2)>1000 ppm) were also examined. Ten clade C types and three clade D types dominated the 443 coral samples. Symbiodinium types strongly contrasted between coral species, however, no differences were observed due to CO2 exposure. Within five species, 85-95% of samples exhibited the same Symbiodinium type across all sites, with remaining rare types having no patterns attributable to CO2 exposure. The sixth species of coral displayed site specific differences in Symbiodinium types, unrelated to CO2 exposure. Symbiodinium types from the coral inhabiting the extreme CO2 seep site were found commonly throughout the moderate seeps and control areas. Our finding that symbiotic associations did not change in response to CO2 exposure suggest that, within the six coral hosts, none of the investigated 13 clade C and D Symbiodinium types had a selective advantage at high pCO(2). Acclimatisation through changing symbiotic association therefore does not seem to be an option for Indo-Pacific corals to deal with future OA.
dc.description.sponsorship The Australian Institute of Marine Science not only funded the project but is the employer of all three authors (as reflected in the authors affiliations). Therefore the Australian Institute of Marine Science was involved in all stages of the project.
dc.description.uri en_US
dc.language English
dc.language.iso en en_US
dc.publisher PLOS en_US
dc.relation.ispartof Null
dc.rights Attribution-NonCommercial-NoDerivs 3.0 Australia en_AU
dc.rights.uri en_AU
dc.subject Science & Technology - Other Topics
dc.subject Great-barrier-reef
dc.subject Genus Symbiodinium
dc.subject Host-symbiont Specificity
dc.subject Ocean Acidification
dc.subject Algal Symbiosis
dc.subject Acropora Corals
dc.subject Endosymbionts
dc.subject Clade-d
dc.subject Climate-change
dc.subject Multidisciplinary Sciences
dc.subject Calcification
dc.subject Diversity
dc.subject Photosynthesis
dc.title Symbiodinium Community Composition in Scleractinian Corals Is Not Affected by Life-Long Exposure to Elevated Carbon Dioxide
dc.type journal article en_US
dc.identifier.doi 10.1371/journal.pone.0063985
dc.identifier.wos WOS:000320362700089

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