Estimation of Species Diversity of Carabid Beetles in the Japanese Tea Plantations

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  • Toyoshima Shingo
    National Institute of Vegetable and Tea Science, National Agriculture and Food Research Organization
  • Ishijima Chikara
    National Institute of Vegetable and Tea Science, National Agriculture and Food Research Organization
  • Sato Yasushi
    National Institute of Vegetable and Tea Science, National Agriculture and Food Research Organization

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Other Title
  • 茶園におけるゴミムシ群集の多様性評価
  • サエン ニ オケル ゴミムシ グンシュウ ノ タヨウセイ ヒョウカ

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Ground beetles sampled with pitfalls in the tea plantations were investigated to estimate the effect of farming systems on the species diversity of ground beetles. In addition, the effects of the number of traps and the period of investigation on the diversity indices were analyzed to determine the minimum procedure for the investigation. The result showed that farming systems did not affect the number of species or the diversity indices of ground beetles. The number of traps affected the number of species, but not the species diversity. Longer period of investigation seemed to be better for the estimation of the diversity. As a minimum procedure, 3 traps and 6 months were required to evaluate a reliable estimation of the diversity of ground beetles.

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