Abstract
In Japan, zooxanthellate Palythoa tuberculosa Klunzinger and Palythoa mutuki Verrill (Anthozoa: Hexacorallia: Zoantharia) are found over a 1,000 + km latitudinal range, often in environments where most other zooxanthellate anthozoans are not found (i.e. tidal lagoon pools, around shallow water hydrothermal vents, subtropical rocky shorelines). Sequences of internal transcribed spacer of ribosomal DNA (ITS-rDNA) of the symbiotic dinoflagellate genus Symbiodinium (zooxanthellae) Freudenthal (Order Suessiales) from P. tuberculosa and P. mutuki from several locations in Japan (34°11′N–24°16′N) were analysed. Unexpectedly, despite the ability of the genus Palythoa to be flexible in association with different Symbiodinium subclades, most (35 of 36) Palythoa investigated here specifically associate with subclade C1 and closely related types. Symbiodinium subclade C1 has been characterized as a “generalist” in terms of the ability to associate with a range of hosts, but present results suggest that subclade C1 may also be a “generalist” in terms of being able to live in a variety of environments over a latitudinal range.
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Acknowledgments
The authors thank Masaru Kawato (JAMSTEC) for sequencing assistance, and Drs. Shusuke Ono and Junzo Tsukahara for their ideas on Palythoa. The following people helped with sampling: Dr. Yasuo Furushima (JAMSTEC), Tatsu Yarabu, Mamoru Uehara, Masanori Uehara, Osamu Tamashiro, Yuzo Tamashiro, (Ishigaki), Hideo Noda, Kei Sasahara (Miyakejima), Ryan Cox (Bonotsu), Mika Reimer, Denny Probizanski (Amami), Shin Hiasashi (Yoron and Erabu), and Dr. Hiroomi Uchida (Kushimoto). At JAMSTEC JDR was supported by a Japan Society for the Promotion of Science (JSPS) post-doctoral fellowship.
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Reimer, J.D., Takishita, K. & Maruyama, T. Molecular identification of symbiotic dinoflagellates (Symbiodinium spp.) from Palythoa spp. (Anthozoa: Hexacorallia) in Japan. Coral Reefs 25, 521–527 (2006). https://doi.org/10.1007/s00338-006-0151-4
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DOI: https://doi.org/10.1007/s00338-006-0151-4