| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Declines in plants and herbivorous insects due to land-use abandonment and intensification, have been studied in agricultural areas worldwide. We compared plant richness and butterfly and orthopteran richness and diversity among three land-use types in semi-natural grasslands: abandoned, traditional and intensified terraces. Plant and herbivore richness and diversity were significantly lower in abandoned and intensified grasslands than in traditional grasslands. Changes in the mowing frequency explained plant richness decline as a consequence of land abandonment and intensification. The results suggest that a mowing frequency of 2-3 times per year enhance herbivore richness directly, as well as indirectly by enhancing plant diversity.
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