防波堤建設による環境変化と移植アマモ場の拡大 Changes in Environmental Factors and Expansion of Transplanted Eelgrass (Zostera marina L.) Bed by Construction of Breakwater

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The objective of this study is to clarify the effect of wave control by the construction of breakwater and eelgrass transplantation on eelgrass bed formation. We investigated the changes in environmental factors after the construction of the breakwater and transplanted eelgrass bed at the coast of Shimokamagari Island in the Seto Inland Sea, Japan. The rafting reproductive shoots with seeds in natural beds were predicted to be transported by the current to the transplantation area before the construction of the breakwater. However, the eelgrass bed was not formed. Wave height at the transplantation area was predicted to decrease to less than 1/5 due to the construction of the breakwater. This value was the same as those obtained for natural beds. Sediment inside the breakwater was muddier than outside and had an optimum grain size for eelgrass. Sea bottom level was stable inside the breakwater, whereas scouring that uprooted eelgrass occurred outside the breakwater in winter. The transplanted bed inside the breakwater expanded from 2,000m2 to 4,200m2 in two years. The moderate reduction in wave height and sediment stability caused by the construction of the breakwater played an important role in eelgrass bed formation and eelgrass transplantation.

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  • 水環境学会誌 = Journal of Japan Society on Water Environment

    水環境学会誌 = Journal of Japan Society on Water Environment 26(12), 849-854, 2003-12-10

    公益社団法人 日本水環境学会

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各種コード

  • NII論文ID(NAID)
    10012563393
  • NII書誌ID(NCID)
    AN10372439
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09168958
  • NDL 記事登録ID
    6796872
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL 請求記号
    Z16-1045
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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