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Coral Distributions and Physical Environments in Sakiyama Bay

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Geophysical Approach to Marine Coastal Ecology

Part of the book series: Springer Oceanography ((SPRINGEROCEAN))

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Abstract

This study was conducted to clarify the relation between coral distributions and physical variables in Sakiyama Bay, Iriomote Island, Japan. First, the distributions of coral coverage by the colony shapes and coral areas by the community types were investigated at 72 points around the bay. Next, physical variables such as oceanic flow and soil particle numbers were analyzed by numerical simulation under average summer and winter conditions in the region. The results were compared with the obtained coral distribution. From those results, we inferred the following: (1) Coral coverage shows a direct relation with bottom flows in the region; the bottom flows differ among coral community types. (2) Coral coverage shows an inverse relation with soil particle numbers in the region. Enhalus acoroides mainly inhabits areas with greater numbers of soil particles.

This chapter is based on the work reported by Shimokawa et al. (2016).

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Acknowledgements

We thank Ms. Seina Miyauchi, Ms. Mayumi Suzuki, Mr. Yuichi Yoshioka, and Mr. Yuji Kitahara of Tokai University for their help, Mr. Kota Nakase of Penta-Ocean Construction Co., Ltd. for his helpful comments on Enhalus acoroides. This work is supported by the Japan Society for the Promotion of Science through Grant No. 16K13879 and 18K04377.

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Authors and Affiliations

  1. Storm, Flood and Landslide Research Division, National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan

    Shinya Shimokawa & Tomokazu Murakami

  2. Okinawa Regional Research Center, Tokai University, Yaeyama, Japan

    Hiroyoshi Kohno & Akira Mizutani

Authors
  1. Shinya Shimokawa
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  2. Hiroyoshi Kohno
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  3. Tomokazu Murakami
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  4. Akira Mizutani
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Corresponding author

Correspondence to Shinya Shimokawa .

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Editors and Affiliations

  1. Storm, Flood and Landslide Research Division, National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan

    Shinya Shimokawa

  2. Storm, Flood and Landslide Research Division, National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan

    Tomokazu Murakami

  3. Okinawa Regional Research Center, Tokai University, Yaeyama, Japan

    Hiroyoshi Kohno

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Shimokawa, S., Kohno, H., Murakami, T., Mizutani, A. (2020). Coral Distributions and Physical Environments in Sakiyama Bay. In: Shimokawa, S., Murakami, T., Kohno, H. (eds) Geophysical Approach to Marine Coastal Ecology. Springer Oceanography. Springer, Singapore. https://doi.org/10.1007/978-981-15-1129-5_10

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