Journal of Ecology and Environment

The Ecological Society of Korea (한국생태학회)
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Floristic Composition, Grazing Effects and Above-ground Plant Biomass in the Hulunbeier Grasslands of Inner Mongolia, China

  • Kawada, Kiyokazu (National Institute for Agro-Environmental Sciences) ;
  • Kurosu, Mayu (Graduate School of Life and Environmental Sciences, University of Tsukuba) ;
  • Cheng, Yunxiang (Graduate School of Life and Environmental Sciences, University of Tsukuba) ;
  • Tsendeekhuu, Tsagaanbandi (Department of Botany, Faculty of Biology, National University of Mongolia) ;
  • Wuyunna, Wuyunna (Department of Environmental Engineering, College of Life Science, Dalian Nationalities University) ;
  • Nakamura, Toru (Graduate School of Life and Environmental Sciences, University of Tsukuba) ;
  • Hayashi, Ichiroku
  • Published : 2008.11.30
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Abstract

In order to assess the effect of grazing on grasslands using floristic composition, we studied the floristic composition and plant biomass of steppe vegetation in Hulunbeier, Inner Mongolia. The dominant species of the grasslands were Stipa krylovii, Stipa grandis and Leymus chinensis. Floristic composition changed according to grazing pressure, being light, heavy and moderate. Under heavy grazing conditions, the importance value of P. acaulis, C. korshinskyi and Cleistogenes squarrosa increased in the plant community. These species were indicators of heavily grazed stand. Plant biomass of the stands ranged within 11.6g $m^{-2}$ and 63.5g $m^{-2}$ and 69.5g $m^{-2}$ and 166.2g $m^{-2}$ to the west and east of Lake Hulun, respectively. These values are equivalent to ca. $450{\sim}1,000kg$ of atmospheric carbon per hector, which is retained within the stand during the summer season.

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References

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