The grassland ecosystem is one of the main ecosystems on the land. The degradation of grassland ecosystem has been getting serious in recent decades of years. The studies of succession,degradation, diagnosis and biodiversity protection of grassland ecosystem have become the important fields.%草原生态系统是主要的陆地生态系统之一.近几十年来,草原地区生态系统退化现象越来越严重,草原生态系统的演替、退化、诊断、多样性保护等已成为热点研究领域.
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