著者

Andrew H. Baird Alasdair J. Edwards James R. Guest Saki Harii Masayuki Hatta Liam Lachs Hanaka Mera Frederic Sinniger David Abrego Or Ben-Zvi Omri Bronstein Patrick C. Cabaitan Vivian R. Cumbo Gal Eyal Lee Eyal-Shaham Bar Feldman Joana Figueiredo Jean-François Flot Mila Grinblat Andrew Heyward Michio Hidaka Mamiko Hirose Akira Iguchi Naoko Isomura Robert A. Kinzie Seiya Kitanobo Alyson Kuba Oren Levy Yossi Loya Takuma Mezaki Amin R. Mohamed Masaya Morita Satoshi Nojima Yoko Nozawa Rian Prasetia Eneour Puill-Stephan Catalina Ramirez-Portilla Hanna Rapuano Yaeli Rosenberg Yusuke Sakai Kazuhiko Sakai Tom Shlesinger Tullia I. Terraneo Irina Yakovleva Hiromi H. Yamamoto Kiyoshi Yamazato

出版者

The Japanese Coral Reef Society

雑誌

Galaxea, Journal of Coral Reef Studies (ISSN:18830838)

巻号頁・発行日

pp.G2021_S10O, (Released:2021-11-19)

参考文献数

27

被引用文献数

9

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Sesoko Station, Okinawa, has been the site of many significant advances in coral reproductive research and it continues to be a preferred destination for both Japanese and international researchers. Consequently, there are decades of spawning observations, which we present and explore here with the aim of making it easier to predict when species spawn at Sesoko Station. The data include over 700 spawning observations from 87 species of reef-building hermatypic corals. Almost all spawning occurred between dusk and dawn, with most spawning activity concentrated in the 2 to 4 hours after sunset. Some phylogenetic patterns were evident: most Acropora species spawn on or around the 6th full moon after December 21st (the northern hemisphere winter solstice); spawning in common species of merulinids and Porites appears to be concentrated around the 7th full moon and spawning in the fungiids around the 8th and subsequent full moons. The night of peak spawning with respect to the night of the full moon varied considerably among years in common Acropora species, but was dependent on the calendar date of the full moon in May or June. Therefore, despite an extended spawning season of over three months and considerable variation in the calendar date of spawning in many species among years, the month and night of spawning are reasonably predictable for many species enhancing the value of Sesoko Station as a site for coral reproductive research.

著者

諏訪 僚太 中村 崇 井口 亮 中村 雅子 守田 昌哉 加藤 亜記 藤田 和彦 井上 麻夕里 酒井 一彦 鈴木 淳 小池 勲夫 白山 義久 野尻 幸宏 Ryota Suwa Takashi Nakamura Akira Iguchi Masako Nakamura Masaya Morita Aki Kato Kazuhiko Fujita Mayuri Inoue Kazuhiko Sakai Atsushi Suzuki Isao Koike Yoshihisa Sirayama Yukihiro Nojiri 京都大学フィールド科学教育研究センター瀬戸臨海実験所 九州大学付属天草臨海実験所 琉球大学熱帯生物圏研究センター瀬底研究施設 琉球大学熱帯生物圏研究センター瀬底研究施設 琉球大学熱帯生物圏研究センター瀬底研究施設 琉球大学大学院理工学研究科 琉球大学大学院理工学研究科 東京大学海洋研究所 琉球大学熱帯生物圏研究センター瀬底研究施設 産業技術総合研究所 琉球大学 京都大学フィールド科学教育研究センター瀬戸臨海実験所 国立環境研究所地球環境研究センター Seto Marine Biological Laboratory Field Science Education and Research Center Kyoto University Amakusa Marine Laboratory Kyusyu University Sesoko Station Tropical Biosphere Research Center University of the Ryukyus Sesoko Station Tropical Biosphere Research Center University of the Ryukyus Sesoko Station Tropical Biosphere Research Center University of the Ryukyus Graduate School of Engineering and Science University of the Ryukyus Graduate School of Engineering and Science University of the Ryukyus Ocean Research Institute The University of Tokyo Sesoko Station Tropical Biosphere Research Center University of the Ryukyus Geological Survey of Japan National Institute of Advanced Industrial Science and Technology(AIST) University of the Ryukyus Seto Marine Biological Laboratory Field Science Education and Research Center Kyoto University Center for Global Environmental Research National Institute for Environmental Studies

出版者

日本海洋学会

雑誌

海の研究 (ISSN:09168362)

巻号頁・発行日

vol.19, no.1, pp.21-40, 2010-01-05

参考文献数

102

被引用文献数

3

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産業革命以降の二酸化炭素(CO_2)排出量の増加は,地球規模での様々な気候変動を引き起こし,夏季の異常高海水温は,サンゴ白化現象を引き起こすことでサンゴ礁生態系に悪影響を及ぼしたことが知られている。加えて,増加した大気中CO_2が海水に溶け込み,酸として働くことで生じる海洋酸性化もまた,サンゴ礁生態系にとって大きな脅威であることが認識されつつある。本総説では,海洋酸性化が起こる仕組みと共に,海洋酸性化がサンゴ礁域の石灰化生物に与える影響についてのこれまでの知見を概説する。特に,サンゴ礁の主要な石灰化生物である造礁サンゴや紅藻サンゴモ,有孔虫に関しては,その石灰化機構を解説すると共に,海洋酸性化が及ぼす影響について調べた様々な研究例を取り上げる。また,これまでの研究から見えてきた海洋酸性化の生物への影響評価実験を行う上で注意すべき事項,そして今後必要となる研究の方向性についても述べたい。The increase of the atmospheric carbon dioxide (CO_2) concentration after the industrial revolution caused global climate change. During the last several decades, coral reef ecosystems have been devastated by the mass-scale coral bleaching events caused by abnormally high seawater temperature in summer. In addition, increased atmospheric CO_2dissolves in the ocean, acts as an acid and finally decreases the pH level of seawater. This phenomenon, known as ocean acidification, is now being considered as a future threat to the calcifying organisms in coral reef ecosystems. In this review, we summarize basic backgrounds of ocean acidification as well as its potential impacts on coral reef calcifiers. Together with the distinctive mechanisms of calcification among specific groups, we review the impacts of ocean acidification on major reef-builders such as scleractinian corals, calcareous red algae and reef-dwelling foraminifera. Finally, we point out some recently-recognized problems in acidified seawater experiments as well as the future direction of this research field.

著者

Patrick C. CABAITAN Hiromi YAMAMOTO Kazuhiko SAKAI

出版者

日本サンゴ礁学会

雑誌

Galaxea, Journal of Coral Reef Studies (ISSN:18830838)

巻号頁・発行日

vol.14, no.1, pp.27-40, 2012 (Released:2013-03-22)

参考文献数

33

被引用文献数

1 7

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Coral communities at nine sites off the coast of Motobu, Okinawa, were examined 6 and 12 years after a 1998 mass coral bleaching event caused by anomalous seawater temperatures. Overall, mean coral coverage increased from 17% in 2006 to 28% in 2010 at these sites, although these percentages were lower than the coral coverage at a nearby reef at Sesoko Island. Some of the corals that had not recovered (the “losers”) at the Sesoko reef were found at some sites in the present study. Dominant coral taxa differed among sites, probably because of differences in the environmental conditions at the sites, e.g., the so-called massive-type coral Porites dominated at a protected site near a river, while branching-type Acropora was dominant at exposed sites. Acropora was one of the prominent short-term losers, but contributed significantly to coral coverage increases due to its fast growth at some exposed sites. Adjacent reefs, which may share similar environmental conditions, also showed some variability, possibly due to processes such as coral recruitment and post settlement survival, which acted on a smaller spatial scale. Multivariate analyses such as multidimensional scaling were more sensitive than univariate analyses. Overall, recruitment was low, especially at sites with high coral coverage, which implies that remnant corals may have contributed to the recovery of these reefs. Coral communities in this area are recovering and there has been no apparent shift to algae-dominated communities. The recovery of coral communities appears to be related to the life history traits of corals and environmental conditions.