干拓堤防締切り後の諫早湾および有明海中央部における二枚貝類の変化(<特集>干潟の自然,その過去と現在) Faunal change of bivalves in Ariake Sea after the construction of the dike for reclamation in Isahaya Bay, Western Kyushu, Japan(<Special Issue>Nature of tidal flats, its past and present)

この論文にアクセスする

この論文をさがす

著者

抄録

In April 1997, the inner part of Isahaya Bay was shut off from Atiake Sea, western Kyushu, Japan with a dike for reclamation. After this isolation, in the both inner and outer parts of Isahaya Bay, aspects of water quality suddenly changed, and fauna of bivalves was drastically replaced. In the outer part of Isahaya Bay, 25 species of bivalves were collected from the 20 fixed stations in June 1997. However, the number of species and the mean individual density suddenly decreased starting November 1998, and then increased after November 2000. These phenomena are synchronized with the temporal change of the dissolved oxygen in this area. In the inner part of Isahaya Bay, 11 species of marine bivalves were collected in large numbers before the dike was completed. These species were still alive in May 1997, but most of them had died by August 1997, when salinity decreased to <5psu. However, an introduced species, Potamocorbula sp. That was not found prior to the isolation of this bay, replaced the pre-isolation bivalve community since August 1997. This species also increased in number in Saemangeum, western Korea, after the dike construction, and in San Francisco Bay, USA as an exotic species. Therefore, it can survive and multiply alone through large environmental changes such as isolation and artificial introduced. Fossils of this species were also found from several horizons in Holocene deposits in southwestern Japan. These fossils occur only in a monospecific shell bed, and some marine bivalves occur below this shell bed. Therefore, the aggregation of Potamocorbula shells is essential to the reconstruction of environmental changes, such as isolation.

収録刊行物

  • 化石

    化石 76(0), 90-99, 2004

    日本古生物学会

参考文献:  55件中 1-55件 を表示

被引用文献:  4件中 1-4件 を表示

各種コード

  • NII論文ID(NAID)
    110002704327
  • NII書誌ID(NCID)
    AN00041606
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    00229202
  • NDL 記事登録ID
    7105917
  • NDL 雑誌分類
    ZR1(科学技術--生物学) // ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z18-838
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  J-STAGE 
ページトップへ