Continuation of sediment-sampling surveys in the inner part of Ariake Sea for 25 years and development of citizen-participatory survey methods ―Research Group for Conservation Ecology on Ariake Sea―

DOI

Bibliographic Information

Other Title
  • 四半世紀にわたる有明海奥部海域の採泥調査の継続と市民参加型調査手法の開発 ―有明海保全生態学研究グループ―

Abstract

<p>Since April 1997, the inner part of Isahaya Bay has been isolated from Ariake Sea by a dike for reclamation. We periodically monitored water quality, grain-size of bottom sediments and benthic animals by the samples collected at (1) 50 fixed stations around inner part of Ariake Sea and (2) 16 fixed stations inside of the dike in June 2021 and June 2022. Both in the inner and outer parts of Isahaya Bay, the number of species and mean individual density of benthic animals have been still smaller than the past. After the shut-off, benthic animals rapidly decreased from 1998 to 2001, and then only few species increased from 2002 to 2003. However, from 2004 to 2022, most of them have disappeared or decreased rapidly around the central part of Ariake Sea. Based on the data obtained in these 25 years, the future trends in changes of benthic animals were predicted in both cases of opening and non-opening gates of the dike. The results of our research were published in scientific journals as well as explained to the public at local meetings. It is greatly expected that the results of our research will be helpful for future investigations on effects of the dike to the status of Isahaya Bay as basic scientific information.</p>

Journal

Keywords

Details 詳細情報について

  • CRID
    1390579444529032576
  • DOI
    10.32215/pronatura.32.0_86
  • ISSN
    21897727
    24320943
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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