北海道におけるススキ（Miscanthussinensis）草地の植生遷移と生産力の推移

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タイトル別名
  • Vegetation succession and production of Miscanthus-type grassland in the northern district of Japan
  • 北海道におけるススキ(Miscanthus sinensis)型草地の植生遷移と生産力の推移
  • ホッカイドウ ニ オケル ススキ(Miscanthus sinensis)カタ クサチ ノ ショクセイ センイ ト セイサンリョク ノ スイイ

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Although the importance of native grasslands is increasing the recognition of biodiversity conservation and local culture, the mechanism of vegetation succession is still unknown. The purpose of this study was to explore the vegetation succession process of the Miscanthus-type grassland, which is one of the typical semi-natural grassland vegetation of Japan. In Sapporo, Hokkaido, close to the northern distribution limit of Miscanthus sinensis, the effects of summer harvest on the vegetation and aboveground biomass of the native Miscanthus-type grassland was investigated for 10 years. Dominance of Miscanthus could be maintained by annual or biennial summer harvesting by suppressed Sasa sinensis. The number of species (26 species/30 m^2, 5.1-7.0 species/m^2） was lower than that in other areas of Japan, and the species number and diversity index did not increase despite enrichment of the light environment. Aboveground biomass of only Miscanthus (120-300 gDM/m^2) did not differ between the treatments. The biomass tended to decrease during biennial harvesting, thus suggesting that in order to retain the biomass for long-term, it should not be harvested often and should be conserved.

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