沿岸浅海底に生息する懸濁物食性二枚貝類の食物資源の利用性 Utilization of Food Sources by Benthic Suspension Feeding Bivalves in Shallow Coastal Areas

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The dominant food sources of benthic suspension feeding bivalves living in shallow coastal areas have been known to be phytoplankton and microphytobenthos. However, there has been considerable debate over which is the primary food source. In this paper, we reviewed previous studies that deal with microalgae (i.e. phytoplankton and microphytobenthos) as a food source for benthic suspension feeding bivalves living in shallow coastal areas. Results of previous studies examining the stable carbon isotope composition of the cockle, Cerastoderme edule, in various coastal areas showed that the main food source for C. edule varied spatially. We estimated the main food source for the clam, Ruditapes philippinarum, on a tidal flat at the mouth of the Midori River. We concluded that R. philippinarum was predominantly feeding on the microphytobenthos. In our sampling station, the annual mean micropytobenthos biomass of the sediment was 30.2±10.2 mgChl-a m<SUP>-2</SUP>; this was approximately three times higher than that of phytoplankton in the overlying water column. The high biomass of the microphytobenthos coupled with high tidal and turbulent flow at the mouth of the Midori River results in resuspension and high relative abundance of the microphytobenthos to the overlying phytoplankton. This resuspension provides access to the microphytobenthos as the dominant food for R. philippinarum. To clarify whether the relative importance of phytoplankton and microphytobenthos as food for benthic suspension feeding bivalves living in shallow coastal areas, we need to understand the environmental factors influencing their main food source; additional case studies in this regard is necessary.

収録刊行物

  • 日本ベントス学会誌 = Japanese journal of benthology  

    日本ベントス学会誌 = Japanese journal of benthology 61, 59-65, 2006-07-28 

    JAPANESE ASSOCIATION OF BENTHOLOGY

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各種コード

  • NII論文ID(NAID)
    10018213024
  • NII書誌ID(NCID)
    AA11376003
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    1345112X
  • NDL 記事登録ID
    8068544
  • NDL 雑誌分類
    ZR1(科学技術--生物学)
  • NDL 請求記号
    Z74-B668
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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