葉上浮泥による光量低下と砂面変動がアマモ場の分布に及ぼす影響―広島湾でのケーススタディ―

• 平岡 喜代典

  財団法人広島県環境保健協会

• 杉本 憲司

  財団法人広島県環境保健協会

• 太田 誠二

  広島防衛施設局

• 寺脇 利信

  独立行政法人水産総合研究センター瀬戸内海区水産研究所

• 岡田 光正

  広島大学大学院工学研究科

書誌事項

タイトル別名

• Effects of Light Reduction by Sediment Deposition on Leaves and Sand Movement on Eelgrass Distribution (Zostera marina L.) at Hiroshima Bay in the Seto Inland Sea, Japan
• ヨウ ジョウフデイ ニ ヨル コウリョウ テイカ ト スナメン ヘンドウ ガ アマモバ ノ ブンプ ニ オヨボス エイキョウ ヒロシマワン デ ノ ケーススタディ
• Effect of light reduction by sediment deposition on leaves and sand movement on eelgrass distribution (<italic>Zostera marina</italic> L.) at Hiroshima bay in the Seto Inland Sea, Japan
• 広島湾でのケーススタディ

抄録

The objective of this study is to clarify the effect of light reduction by sediment deposition on leaves and sand movement on eelgrass distribution for obtaining fundamental knowledge on the formation of the eelgrass (Zostera marina L.) habitat. We investigated light regime and sediment deposition on leaves near the lower edge of an eelgrass bed, and monitored sand movement and transplanted eelgrass in an unvegetated site near the higher edge. The average light intensity through sediment deposition on eelgrass leaves was estimated to be approximately 3 E·m^-2·d^-1 at a low depth limit. As sediment deposition on leaves was 0.7 mg·cm^-2 <, the light intensity required by eelgrass might be 4 E·m^-2·d^-1 <. Sand movement at the unvegetated site ranged from -10 cm to 12 cm and was more unstable than that at a natural site. Scouring for two months reached up to 10 cm, and seedlings disappeared at the unvegetated site near the higher edge. However, the number of vegetative shoots in the unvegetated site steadily increased. These results suggest that vegetative shoots can survive within 10 cm washouts and the growth of eelgrass near the higher edge of an eelgrass bed is restricted to vegetative reproduction.

収録刊行物

• 水環境学会誌

  水環境学会誌 28 (4), 257-261, 2005

  公益社団法人 日本水環境学会

キーワード

• <i>Zostera marina</i>
• irradiance
• sediment deposition on leaves
• low depth limit
• sand movement

詳細情報

• CRID: 1390282680057416960
• NII論文ID: 10015476936
• NII書誌ID: AN10372439
• DOI: 10.2965/jswe.28.257
• COI: 1:CAS:528:DC%2BD2MXktlCkur0%3D
• ISSN: 18813690
• ISSN: 09168958
• NDL書誌ID: 7320445
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7320445
• Web Site: https://www.jstage.jst.go.jp/article/jswe/28/4/28_4_257/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可