Biodiversity Science ›› 1995, Vol. 03 ›› Issue (3): 125-130.doi: 10.17520/biods.1995022

• 论文 •     Next Article

Restoration dynamics of degraded grasslands in the typical steppe zone of Inner Mongolia

Li Yonghong   

  1. The Inner mongolia Grassland Ecosystem Research Station,Institute of Botany,Chinese Academy of Sciences,Beijing 100044
  • Received:1994-08-20 Revised:1994-12-04 Online:1995-08-20

Monitoring restoration of the degraded grasslands can provide knowledges on the restoration processesand mechnisms,reveal the factors limiting restoration,and is therefore a base for making ecological measures for fast restoration with the lowest input. The natural restoration of a degraded grassland dominated by Potentila acaulis,Artemisia frigida and Carex duriuscula were monitored biennually since 1985in the Xilingol Steppe Biosphere Reserve, Inner Mongolia. The results showed that, through 8-years'restoration,the height of grassland community greatly increased;while its cover and phytomass had anincrease at first,and then a decrease. The species richness of the community had only a slight increase ,the reason of which was that the grassland was co-evoluted with wildlife,especially the ungulates,andalso had a long grazing history of domestic animals,so plants had high tolerence to grazing pressure,andexclosure of grazing could not make a great increase in species richness. The community succession weremainly due to the changes in dominance of different species. The dynamic analysis of the community equitability during the restoration indicated that the community had not restored to the stable state of theoriginal steppe grasslands corresponding to the regional climate.

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