転石地潮間帯におけるフジツボパッチ内外の貝類群集組成の比較 Comparison of Molluscan Community Composition Inside and Outside of Barnacle Patches on an Intertidal Boulder Shore

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Microhabitat structure, represented by the presence or absence of sessile organisms, may affect the composition of mobile communities. A barnacle, <I>Chthamalus challengeri</I>, forms dense patches of different sizes on an intertidal boulder shore in Amakusa, Japan, where mobile, herbivorous gastropods and chitons are the most dominant. To study the effects of the barnacle patches on the density and size structure of several herbivorous molluscs, we carried out quantitative quadrat sampling both inside and outside barnacle patches in July, 1994. Molluscan community composition and the size structure of dominant species inside barnacle patches were apparently different from those outside. The small gastropods <I>Littorina brevicula</I> and <I>Peasiella inffracostata</I> occurred only in the barnacle patches. The mean sizes of <I>Nipponacmea teramachii, Monodonta labio, Patelloida pygmaea, Nipponacmea nigrans</I>, and <I>Lunella coronata</I> were smaller inside than outside the patches, but <I>Acanthochiton defilippi</I> showed the reverse trend. Densities of <I>A. defilippi, L. coronata, </I> and the predatory gastropod <I>Thais clavigera</I> were higher inside the patches than outside, while the densities of <I>M. labio, P. pygmaea</I>, and <I>N. nigrans</I> were lower inside than outside. The influences of barnacles on herbivorous gastropods on the boulder shore are discussed in the context of some hypotheses proposed in recent studies of rocky shore community ecology.

収録刊行物

  • Benthos research  

    Benthos research 51(2), 1-11, 1996-11-01 

    JAPANESE ASSOCIATION OF BENTHOLOGY

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各種コード

  • NII論文ID(NAID)
    10002094862
  • NII書誌ID(NCID)
    AN10565057
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    02894548
  • NDL 記事登録ID
    4140744
  • NDL 雑誌分類
    ZR1(科学技術--生物学)
  • NDL 請求記号
    Z18-1643
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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