RECOVERY OF <i>Acroporidae verrill</i> CORAL COMMUNITIES AFTER WIDESPREAD BLEACHING IN AMITORI BAY, IRIOMOTE ISLAND IN 2016
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- MURAKAMI Tomokazu
- 国立研究開発法人防災科学技術研究所 水・土砂防災研究部門
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- KOHNO Hiroyoshi
- 東海大学 沖縄地域研究センター
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- NAKAMURA Masako
- 東海大学 海洋学部水産学科
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- KUROSAWA Kaori
- 東海大学 海洋学部海洋生物学科
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- KUNISHIMA Ayano
- 東海大学 生物学部海洋生物科学科
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- TAKESHITA Yohei
- 東海大学 海洋学部海洋生物学科
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- MIZUTANI Akira
- 東海大学 沖縄地域研究センター
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- SHIMOKAWA Shinya
- 国立研究開発法人防災科学技術研究所 水・土砂防災研究部門
Bibliographic Information
- Other Title
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- 西表島網取湾における2016年大規模白化後のミドリイシ科サンゴ群集の回復状況
- イリオモテジマモウシュワン ニ オケル 2016ネン ダイキボ ハクカ ゴ ノ ミドリイシカ サンゴ グンシュウ ノ カイフク ジョウキョウ
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Abstract
<p> In 2016, widespread coral bleaching occurred in Amitori Bay, Iriomote Island, Okinawa, Japan. In this study, the coral coverage, spawning rate, number of juvenile coral colonies, water temperature, and other data were measured in 2017 and 2018 to determine the state of the coral communities after intense bleaching and predict their future recovery. The following principle results were obtained: (1) The coral coverage significantly reduced in 2017 than in 2016 and remained constantly low in 2017 and 2018. (2) No bleaching was observed in 2017 or 2018 owing to the decrease in the water temperature by the typhoons. (3) The spawning rates in 2017 and 2018 were 37.5% and 65.9%, respectively, exhibiting a certain degree of recovery from bleaching damage to a certain level in 2018. (4) Several juvenile coral colonies were observed, particularly at the mouth of the bay. (5) The coverage recovery was considered from the perspective of survey results of this study and the physical field. A nonuniform pointwise recovery was suggested, and recovery was initiated at the mouth and the Amitori side of the bay center.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 75 (2), I_498-I_503, 2019
Japan Society of Civil Engineers