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Distribution of Enhalus acoroides According to Waves and Currents

  • Kota NakaseEmail author
  • Tomokazu Murakami
  • Hiroyoshi Kohno
  • Akiyuki Ukai
  • Akira Mizutani
  • Shinya Shimokawa
Chapter
Part of the Springer Oceanography book series (SPRINGEROCEAN)

Abstract

Enhalus acoroides, tropical sea grass also known as tape grass, is distributed throughout the Yaeyama Islands. It is listed as a vulnerable species (VU) on the Red List of the Ministry of Environment of Japan. Because this species is known to have poor seed dispersal characteristics, necessary conditions of its distribution must be elucidated to support its preservation. We have compared the present community distribution of E. acoroides with the horizontal distribution of numerically reproduced wave height and bottom velocity. Moreover, we have derived the conditions of water depth, waves, and bottom velocity required for the formation of E. acoroides distribution. The periphery of distribution of communities was determined using external forces during a high-wave period such as a typhoon period or a winter monsoon period.

Keywords

Enhalus acoroides Wave height Bottom velocity Physics simulation 

Notes

Acknowledgements

The authors extend their deepest gratitude to undergraduate and graduate students of the School of Marine Science and Technology, Tokai University, for their great endeavors on the surveillance study of E. acoroides.

This study has been conducted under joint research by Okinawa Regional Research Center of Tokai University, National Research Institute for Earth Science and Disaster Resilience, and Penta-Ocean Construction Co. Ltd.

References

  1. Booij N, Holthuijsen LH, Ris RC (1996) The SWAN wave model for shallow water. In: Proceedings of 25th international conference on coastal engineering, vol 1, pp 668–676Google Scholar
  2. Environment Agency Japan (1997) In: Environment Agency Japan (ed) Tidal flats, algal and sea-grass beds and coral reefs in Japan, vol 2. http://www.biodic.go.jp/reports/4-12/r00a.html. 15 July 2019 (in Japanese with English abstract)
  3. Kanazawa T, Mori S (2003) Application of the Zostera bed creation method by sowing sheet. Ann J Coast Eng 50:1266–1270 (in Japanese)Google Scholar
  4. Koch EW, Ackerman JD, Verduin J, van Keulen M (2006) Fluid dynamics in Seagrass ecology—from molecules to ecosystems. In: Larkum AWD et al (eds) Seagrasses: biology, ecology and conservation, Chapter 8, pp 193–225Google Scholar
  5. Komasu T, Umezawa Y, Nakaoka M, Kanamoto C (2004) Water flow and sediment in Enhalus acoroides and other seagrass beds in the Andaman Sea, off Khao Bae Na, Thailand. Coral Mar Sci 29:63–68Google Scholar
  6. Kuo J, Kanamoto Z, Iizumi H, Aioi K, Mukai H (2006) Seagrasses from the Nansei Islands, Southern Japanese archipelago: species composition, distribution and bio-geography. Mar Ecol 27:290–298CrossRefGoogle Scholar
  7. Lacap C, Vermaat J, Rollon R, Nacorda H (2002) Propagule dispersal of theSE Asian seagrasses Enhalus acoroides and Thalassia hemprichii. Mar Ecol Progr Ser 235:75–80CrossRefGoogle Scholar
  8. Maruyama K, Igarashi Y, Ishikawa Y (1987) Techniques for selecting appropriate site to create eelgrass meadows. Ann J Coast Eng 34:227–231 (in Japanese with English abstract)Google Scholar
  9. Ministry of the Environment, Government of Japan (2018) https://www.env.go.jp/nature/kisho/hozen/redlist/RL2018_5_180604.pdf. July 15 2019
  10. Murakami T, Yasuda T, Ohsawa T (2004) Development of a multi-sigma coordinate model coupled with an atmospheric model for the calculation of coastal currents. Ann J Coast Eng 51:366–370 (in Japanese)Google Scholar
  11. 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, Iriomote Island, Japan. J Japan Soc Civil Eng B3(70):1074–1079 (in Japanese with English abstract)Google Scholar
  12. Nakajima Y, Matsuki Y, Arriesgado D, Chun Lán L, Fortes M, Uy W, Campos W, Nakaoka M, Nadaoka K (2013) Elucidation of regional population maintenance mechanism of tropical sea grass Enhalus acoroides using genetic markers. In: Summary of the 60th national convention of the Japanese Ecological Society. https://updoc.site/download/pdf–5b41c5cd71648_pdf. July 15 2019 (in Japanese)
  13. Nakase K (2000) Quantitative estimation of eelgrass distribution from the viewpoint of external forces, at Takeoka Beach, Tokyo Bay, Japan. In: Proceedings of fourth international seagrass biology workshop, pp 397–400Google Scholar
  14. Nakase K, Murakami T, Ukai A, Mizutani A, Shimokawa S, Kohno H (2015) Distribution analysis of Enhalus acoroides 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. Nakase K, Murakami T, Mizutani A, Kohno H, Ukai A, Shimokawa S (2016) Estimation of the Enhalus acoroides distribution using monthly condition n of external forces by wave model in northwest coast of the Iriomote Island. J Japan Soc Civil Eng B2(72):1429–1434 (in Japanese with English abstract)Google Scholar
  16. Rollon RN (1998) Spatial variation and seasonality in growth and reproduction of Enhalus acoroides (L.f.) royle populations in the coastal waters off cape Bolinao, NW Philippines First Edition. A.A. Balkema, Rotterdam, pp 9–35Google Scholar
  17. Takeyama K, Kohno H, Kuramochi T, Iwasaki A, Murakami T, Kimura K, Ukai A, Nakase K (2014) Distribution and growth conditions of Enhalus acoroides on iriomote island. J Japan Soc Civil Eng B3(70):1068–1073 (in Japanese with English abstract)Google Scholar

Data Source

  1. AMeDAS: Japan Meteorological Agency (2008–2009, 2012–2013, 2015). https://www.jma.go.jp/jma/en/Activities/amedas/amedas.html. 15 July 2019
  2. GPV: Japan Meteorological Business Support Center (2008–2009, 2012–202013, 2015). http://www.jmbsc.or.jp/en/index-e.html. 15 July 2019

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Kota Nakase
    • 1
    Email author
  • Tomokazu Murakami
    • 2
  • Hiroyoshi Kohno
    • 3
  • Akiyuki Ukai
    • 1
  • Akira Mizutani
    • 3
  • Shinya Shimokawa
    • 2
  1. 1.Environment Business DivisionPenta-Ocean Construction. Co., Ltd.TokyoJapan
  2. 2.Storm, Flood and Landslide Research DivisionNational Research Institute for Earth Science and Disaster ResilienceTsukubaJapan
  3. 3.Okinawa Regional Research CenterTokai UniversityYaeyamaJapan

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