Long-term changes of infra-littoral zone zooxanthellate cnidarians in the Taisho Lava Field, Sakurajima, Kagoshima, Japan
スポンサーリンク
概要
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In order to investigate long-term changes in a zooxanthellate cnidarian community in the temperate-subtropical area, we marked off a 41m2 area at Taisho Lava Field, Sakurajima, Kagoshima, Japan. Colonies of three zooxanthellate cnidarian species (encrusting anemone Zoanthus sansibaricus Carlgren, soft coral Stereonephthya japonica Utinomi, and bubble anemone Entacmaea quadricolor sensu Fautin and Allen) in the survey area were monitored yearly in August from 1995 to 2004. Seawater temperature data were also obtained to investigate possible environmental influences on observed cnidarian changes. Sequences of internal transcribed spacer region of ribosomomal DNA (ITS-rDNA) were also obtained to identify the dinoflagellate Symbiodinium spp. endosymbionts found within each cnidarian species (subclade C1/C3 in Z. sansibaricus and E. quadricolor, clade G in S. japonica). Our results show that abnormally high ocean temperatures in 1998 (›2.0°C than average summer sea water temperatures) were followed by significant decreases in both cover and colony number in S. japonica, which showed no sign of recovery to the previous level. The difference in changes between the three zooxanthellate cnidarian populations may be primarily due to physiological differences at high ocean temperatures in Symbiodinium spp. hosted by the three cnidarian spp..
著者
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ONO Shusuke
Miyakonojo Higashi High School
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Tsukahara Junzo
Department Of Chemistry And Bioscience Faculty Of Science Kagoshima University
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REIMER James
Rising Star Program, Transdisciplinary Research Organization for Subtropical Island Studies, University
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REIMER James
Rising Star Program, Transdisciplinary Research Organization for Subtropical Island Studies, University of the Ryukyus
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NOZAWA Yoko
Biodiversity Research Center Academia Sinica
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