長野県上伊那地方水田地域におけるトンボ群集構造及び環境選択と立地環境との関係

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タイトル別名
  • Relationship between the Dragonfly Communities and the Environmental Conditions at Paddy Field Areas in the Kamiina district, Nagano Prefecture, Central Japan
  • ナガノケン カミイナ チホウ スイデン チイキ ニ オケル トンボ グンシュウ コウゾウ オヨビ カンキョウ センタク ト リッチ カンキョウ ト ノ カンケイ

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The purpose of this study was to know relationship between dragonflies in paddy area and environmental condition. We selected five various condition study areas (two non-consolidated paddy areas in hilly and mountainous areas, one consolidated paddy area in hilly and mountainous area, one non-consolidated paddy area in urbanized area, one consolidated paddy area in urbanized area.) in the Kamiina district, Nagano Prefecture. The number and behavior of dragonflies were recorded by route census method. The survey of land utilization was carried out on these areas. The number of all of the species was twenty-three. The number of species and individuals were higher in 3 hilly and mountainous areas than in 2 urban areas. Five study areas were classified into 3 hilly and mountainous area region and 2 urban areas by TWINSPAN. Dragonfly communities were classified to seven types. Each type corresponded different environment conditions of waterside, forest and others. It was confirmed that the environmental selection and behavior of mature dragonflies corresponded to the each species character. The environmental selection of mature dragonflies were different between hilly and mountainous area and urban area. It was clear that dragonfly communities were affected by consolidation and urbanization.

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