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Coral Distributions and Physical Environments in Sakiyama Bay

  • Shinya ShimokawaEmail author
  • Hiroyoshi Kohno
  • Tomokazu Murakami
  • Akira Mizutani
Chapter
Part of the Springer Oceanography book series (SPRINGEROCEAN)

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.

Keywords

Reef building coral Sakiyama Bay Physical environment Soil particle Bottom flow Numerical simulation 

Notes

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.

References

  1. Booji N, Ris RC, Holthuijsen LH (1999) A third-generation wave model for coastal regions, 1. Moel description and validation. J Geophys Res 104:7649–7666CrossRefGoogle Scholar
  2. Connell JH (1978) Diversity in tropical rain forests and coral reefs. Science 199:1302–1310CrossRefGoogle Scholar
  3. Cushman-Roisin B, Beckers JM (2011) Introduction to geophysical dynamics, 2nd edn. Elsevier, Amsterdam, 828 ppGoogle Scholar
  4. Goreau TF (1959) The ecology of Jamaican coral reefs, 1. Species composition and zonation. J Ecol 40:67–90CrossRefGoogle Scholar
  5. Kawana T (1990) Geomorphology, geology, climate and marine conditions in and around the Sakiyama Bay. Iriomote Island, The south Ryukyus, Japan. Report of investigation for Sakiyamawan nature conservation area (Ministry of the Environment, Government of Japan), pp 9–26 (in Japanese with English abstract)Google Scholar
  6. Komatsu T, Umezawa Y, Nakakoka M, Supanwanid C, Kanamoto Z (2004) Water flow and sediment in Enhalus acoroides and other seagrass beds in the Andaman Sea, off Khao Bae Na, Thailand. Coast Mar Sci 29:63–68Google Scholar
  7. Motokawa T (2008) Story of coral reefs and coral—a strange ecosystem of the Southern Ocean, Chuokoron-shinsha, Tokyo, 273 pp (in Japanese)Google Scholar
  8. Murakami T, Ukai A, Kohno H, Mizutani A, Shimokawa S, Nakase K, Noguchi K, Yasuda T (2012) Relationships between distributions of coral and physical environments in Amitori Bay, Iriomote island, Japan. J Japan Soc Civil Eng B3(68):1133–1138 (in Japanese with English abstract)Google Scholar
  9. Murakami T, Kohno H, Iwasaki A, Kuramochi T, Shimokawa S, Kimura K (2014) Particle tracking analysis based on ecological investigation of seeds of Enhalus acoroides in Amitori Bay. J Japan Soc Civil Eng B3(70):1074–1079 (in Japanese with English abstract)Google Scholar
  10. Murakami T, Kohno H, Tamamoto M, Mizutani A, Shimokawa S (2015a) Numerical analysis of seed dispersal of Enhalus acoroides in the northwest sea area of Iriomote Island, Japan. J Japan Soc Civil Eng B3(71):951–956 (in Japanese with English abstract)Google Scholar
  11. Murakami T, Shimokawa S, Yoshino J, Yasuda T (2015b) A new index for evaluation of risk of complex disaster due to typhoons. Nat Hazards 75:29–44.  https://doi.org/10.1007/s11069-015-1824-5CrossRefGoogle Scholar
  12. Murakmai T, Ukai A, Noguchi K, Kohno H, Mizutani A, Shimokawa S, Nakase K, Yoshino J (2013) Numerical analysis of sediment transport in Amitori Bay, Irio-mote Island, Japan. J Japan Soc Civil Eng B3(69):928–933 (in Japanese with English abstract)Google Scholar
  13. Murakmai T, Kohno H, Tamamoto M, Mizutani A, Shimokawa S (2015) Numerical analysis of fructification dispersal of Enhalus acoroides in the northwest sea area of Iriomote Island, Japan. J Japan Soc Civil Eng B2(71):1351–1356 (in Japanese with English abstract)Google Scholar
  14. Nakase K, Murakami T, Ukai A, Mizutani A, Shimokawa S, Kohno H (2015) Distri-bution analysis of Enhalus acoroides vegetation, using hydraulic model, in the northwest sea area of Iriomote Island, Okinawa, Japan. J Japan Soc Civil Eng B3(71):957–962 (in Japanese with English abstract)Google Scholar
  15. Ohgaki S (2008) Diversity and similarity—new taxonomic index. Argonauta 15:10–22 (in Japanese)Google Scholar
  16. Rogers CS (1990) Responses of coral reefs and reef organisms to sedimentation. Mar Ecol Prog Ser 62:185–202CrossRefGoogle Scholar
  17. Sheppard CRC, Davy SK, Pilling GM (2009) The biology of coral reefs. Oxford University Press, Oxford, 339 ppCrossRefGoogle Scholar
  18. Shimoji N, Nakasone T, Nishidaira M, Yokote H (1990) Quality of water and sediments of Sakiyama bay nature conservation area, Iriomote Island. Report of investigation for Sakiyamawan nature conservation area (Ministry of the Environment, Government of Japan), pp 27–42 (in Japanese with English abstract)Google Scholar
  19. Shimokawa S, Murakami T, Ukai A, Kohno H, Mizutani A, Nakase K (2014) Relationship between coral distributions and physical variables in Amitori Bay, Iriomote Island, Japan. J Geophys Res Oceans 119:8336–8356.  https://doi.org/10.1002/2014JC010307CrossRefGoogle Scholar
  20. Shimokawa S, Kohno H, Murakami T, Mizutani A, Shibayama T, Yamamoto Y, Ukai A, Nakase K (2015) Relationship between massive coral distribution and physical variables in Amitori Bay, Iriomote Island, Japan. J Japan Soc Civil Eng B3(71):969–974 (in Japanese with English abstract)Google Scholar
  21. Shimokawa S, Kohno H, Murakami T, Miyauchi S, Suzuki M, Mizutani A (2016) Relation between coral distributions and physical variables in Sakiyama Bay, Iriomote Island, Japan. J Japan Soc Civil Eng B2(72):1435–1440 (in Japanese with English abstract)Google Scholar
  22. Stoddart DR (1969) Ecology and morphology of recent coral reefs. Biol Rev Cambridge Phil Soc 44:433–498CrossRefGoogle Scholar
  23. Ukai A, Murakami T, Mizutani A, Nakase K, Shimokawa S, Kohno H (2015) Estimation technique of spatial coral distribution in Amitori Bay, Iriomote Island, Japan. J Japan Soc Civil Eng B3(71):963–968 (in Japanese with English abstract)Google Scholar
  24. Woodley JD, Chornesky EA, Clifford PA, Jackson JBC, Kaufman LS, Knowlton N, Lang JC, Pearson MP, Porter JW, Rooney MC, Rylaarsdam KW, Tunnicliffe VJ, Wahle CM, Wulff JL, Curtis ASG, Dallmeyer MDB, Jupp P, Koehl MAR, Neigel J, Sides EM (1981) Hurricane Allen’s impact on Jamaican coral reefs. Science 214:749–755CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Shinya Shimokawa
    • 1
    Email author
  • Hiroyoshi Kohno
    • 2
  • Tomokazu Murakami
    • 1
  • Akira Mizutani
    • 2
  1. 1.Storm, Flood and Landslide Research DivisionNational Research Institute for Earth Science and Disaster ResilienceTsukubaJapan
  2. 2.Okinawa Regional Research CenterTokai UniversityYaeyamaJapan

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