Show simple item record Edmunds, Peter J. en Gates, Ruth D. en 2018-04-13T21:37:17Z 2018-04-13T21:37:17Z 2008 en
dc.identifier.citation Marine Ecology Progress Series 506, 129-144. (2008) en
dc.identifier.issn 0171-8630 en
dc.identifier.uri en
dc.description.abstract Efforts to monitor coral reefs rarely combine ecological and genetic tools to provide insight into the processes driving patterns of change. We focused on a coral reef at 14 m depth in St. John, US Virgin Islands, and used both sets of tools to examine 12 colonies of Orbicella (formerly Montastraea) annularis in 2 photoquadrats that were monitored for 16 yr and sampled genetically at the start and end of the study. Coral cover and colony growth were assessed annually, microsatellites were used to genetically identify coral hosts in 2010, and their Symbiodinium were genotyped using chloroplastic 23S (cloning) and nuclear ITS2 (cloning and pyrosequencing) in 1994 and 2010. Coral cover declined from 40 to 28% between 1994 and 2010, and 3 of the 12 sampled colonies increased in size, while 9 decreased in size. The relative abundance of Symbiodinium clades varied among corals over time, and patterns of change differed between photoquadrats but not among host genotypes. Symbiodinium communities in 8 corals in 1 photoquadrat differed among colonies and changed over time, with a trend towards reduced abundance of clade C and increased abundance of clade B. Symbiodinium communities in 4 corals in the second photoquadrat were similar among colonies, dominated by clade C, and remained relatively constant in clade composition over time. Based on an analysis that sampled only a small number of corals, but is unique in the long temporal scale and the combination of techniques employed, this study demonstrates that the processes underlying shifts in coral cover are complex and difficult to predict. Meter-scale variation in reef microhabitats affected Symbiodinium communities in O. annularis, and host genotype coupled with variation in Symbiodinium communities appeared to mediate colony success. en
dc.format.extent 16 Pages en
dc.language.iso en en
dc.publisher Marine Ecology Progress Series en
dc.relation.uri en
dc.rights copyright Inter-Research 2014 en
dc.subject Orbicella en
dc.subject montastaea en
dc.subject symbiodinium en
dc.subject genetics en
dc.subject ecology en
dc.subject coral reefs en
dc.title Long-term changes in Symbiodinium communities in Orbicella annularis in St. John, US Virgin Islands en
dc.type Article en

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