The influences of various anthropogenic sources of deterioration on meiobenthos (Ostracoda) over the last 100 years in Suo-Nada in the Seto Inland Sea, southwest Japan

作者：Irizuki Toshiaki^*; Takimoto Ayako; Sako Megumi; Nomura Ritsuo; Kakuno Kouji; Wanishi Akihito; Kawano Shigenori

来源：Marine Pollution Bulletin, 2011, 62(10): 2030-2041.

DOI：10.1016/j.marpolbul.2011.08.005

• Ostracoda
• COD
• The Seto Inland Sea
• Suo-Nada
• Meiobenthos
• Organic pollution

This study focuses on the relationships of water and sediment quality with meiobenthos (Ostracoda) over the past 100 years, using a sediment core obtained from Suo-Nada in the Seto Inland Sea, Japan. We compared high-resolution ostracode results with geochemical and sedimentological data obtained from the study core as well as with rich environmental monitoring data that are available. R-mode cluster analysis revealed two bioassociations (BC, KA). Until the 1960s, assemblages continued to show high diversity. They changed in approximately 1970, when excessive nutrients and organic matter began to be supplied, and most species decreased in number. All species of bioassociation BC were dominant again by the mid-1990s; however, those of bioassociation KA containing infaunal species did not increase and have been absent or rare since the 1970s because organic pollution of sediments has continued to date. This study provided robust baseline for ostracode-based long-term environmental monitoring in East Asia.

• 出版日期2011-10