Impacts of common carp (<i>Cyprinus carpio</i>) on aquatic plants at small agricultural ponds in Ichinoseki City, Iwate Prefecture

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  • Miyazaki Yusuke
    Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • Matsuzaki Shin-ichiro S.
    Environmental Biology Division, National Institute for Environmental Studies
  • Kadoya Taku
    Environmental Biology Division, National Institute for Environmental Studies
  • Sekizaki Yuichiro
    Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • Washitani Izumi
    Graduate School of Agricultural and Life Sciences, The University of Tokyo

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  • 岩手県一関市のため池群においてコイが水草に与えていた影響
  • イワテケン イチノセキシ ノ タメイケグン ニ オイテ コイ ガ ミズクサ ニ アタエテ イタ エイキョウ

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Abstract

We investigated the presence/absence of common carp (Cyprinus carpio) and coverage of aquatic plants including endangered species in 74 small agricultural ponds in hilly regions of Iwate Prefecture, Japan. Our results revealed that the presence of common carp has significant negative effects on the coverage of floating-leaved plants and submerged plants, but not on emergent plants. This indicates that the introduction of common carp to small agricultural ponds can modify habitat conditions for many aquatic organisms by reducing the coverage of aquatic plants.

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