TY - JOUR
T1 - High diversity and host specificity observed among symbiotic dinoflagellates in reef coral communities from Hawaii
AU - LaJeunesse, Todd C.
AU - Thornhill, Daniel J.
AU - Cox, Evelyn F.
AU - Stanton, Frank G.
AU - Fitt, William K.
AU - Schmidt, Gregory W.
N1 - Funding Information:
Acknowledgments The authors thank the participants in the Hawaii Institute of Marine Biology’s ‘‘Molecular biology of corals’’, Edwin W. Pauley summer program of 2002. CBS Scientific generously loaned their DGGE electrophoresis system for this course. Cynthia L. Hunter for helpful discussions and field assistance. T.C.L thanks Michael P. Lesser and Jo-Ann Leong for facilitating his course participation and stay on Coconut Island. This work was supported by the Edwin W. Pauley foundation, National Science Foundation grant OCE-0137007 to WK Fitt and GW Schmidt, a grant from the Smithsonian Center for Caribbean Research, and a NSF graduate research fellowship to D. J. Thornhill.
PY - 2004/12
Y1 - 2004/12
N2 - The Hawaiian Islands represent one of the most geographically remote locations in the Indo-Pacific, and are a refuge for rare, endemic life. The diversity of symbiotic dinoflagellates (Symbiodinium sp.) inhabiting zooxanthellate corals and other symbiotic cnidarians from the High Islands region was surveyed. From the 18 host genera examined, there were 20 genetically distinct symbiont types (17 in clade C, 1 in clade A, 1 in clade B, and 1 in clade D) distinguished by internal transcribed spacer region 2 sequences. Most "types" were found to associate with a particular host genus or species and nearly half of them have not been identified in surveys of Western and Eastern Pacific hosts. A clear dominant generalist symbiont is lacking among Hawaiian cnidarians. This is in marked contrast with the symbiont community structures of the western Pacific and Caribbean, which are dominated by a few prevalent generalist symbionts inhabiting numerous host taxa. Geographic isolation, low host diversity, and a high proportion of coral species that directly transmit their symbionts from generation to generation are implicated in the formation of a coral reef community exhibiting high symbiont diversity and specificity.
AB - The Hawaiian Islands represent one of the most geographically remote locations in the Indo-Pacific, and are a refuge for rare, endemic life. The diversity of symbiotic dinoflagellates (Symbiodinium sp.) inhabiting zooxanthellate corals and other symbiotic cnidarians from the High Islands region was surveyed. From the 18 host genera examined, there were 20 genetically distinct symbiont types (17 in clade C, 1 in clade A, 1 in clade B, and 1 in clade D) distinguished by internal transcribed spacer region 2 sequences. Most "types" were found to associate with a particular host genus or species and nearly half of them have not been identified in surveys of Western and Eastern Pacific hosts. A clear dominant generalist symbiont is lacking among Hawaiian cnidarians. This is in marked contrast with the symbiont community structures of the western Pacific and Caribbean, which are dominated by a few prevalent generalist symbionts inhabiting numerous host taxa. Geographic isolation, low host diversity, and a high proportion of coral species that directly transmit their symbionts from generation to generation are implicated in the formation of a coral reef community exhibiting high symbiont diversity and specificity.
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U2 - 10.1007/s00338-004-0428-4
DO - 10.1007/s00338-004-0428-4
M3 - Article
AN - SCOPUS:11244352230
SN - 0722-4028
VL - 23
SP - 596
EP - 603
JO - Coral Reefs
JF - Coral Reefs
IS - 4
ER -