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生态学杂志 ›› 2010, Vol. 29 ›› Issue (04): 617-623.

• 研究报告 • 上一篇    下一篇

青藏高原多年冻土区高寒植被物种多样性和地上生物量

杨兆平1,2,欧阳华1|3,宋明华1,周才平1,杨文斌1,2,刘小平4   

  1. 1中国科学院地理科学与资源研究所,北京 100101|2中国科学院研究生院,北京 100039|3国际山地综合发展中心|加德满都,G.P.O. Box 3226,尼泊尔|4鄂尔多斯市环境保护中心检测站,内蒙古鄂尔多斯 017000
  • 出版日期:2010-04-09 发布日期:2010-04-09

Species diversity and above-ground biomass of alpine vegetation in permafrost region of Qinghai-Tibetan Plateau.

YANG Zhao-ping1,2,OUYANG Hua1,3,SONG Ming-hua1,ZHOU Cai-ping1,YANG Wen-bin1,2,LIU Xiao-ping4   

  1. 1Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;2Graduate University of Chinese Academy of Sciences,Beijing 100039,China|3International Centre for Integrated Mountain Development,G.P.O. Box 3226, Khumaltar, Kathmandu,Nepal;4Monitoring Station of Environmental Protection Center of Ordos,Ordos 017000,Inner Mongolia,China
  • Online:2010-04-09 Published:2010-04-09

摘要: 基于样方调查统计了青藏高原多年冻土区高寒草地生态系统植物的科属组成,计算了多样性指数和均匀度指数,探讨了多年冻土退化对高寒草地物种多样性的影响。结果表明:多年冻土退化过程中物种组成在属和物种丰富度上呈现降低趋势,湿、中生植物逐渐被旱中生和旱生植物替代;青藏高原多年冻土退化会导致高寒草地生态系统的物种多样性和初级生产力的降低,影响高寒草地生态系统的稳定性;物种多样性与初级生产力具有密切的抛物线型关系。

关键词: 互花米草, 能值分析, 加环, 生态工程

Abstract: Based on quadrat investigation,this paper studied the species composition of alpine vegetation in permafrost region of Qinghai-Tibetan Plateau, calculated the diversity index and evenness index,and approached the effects of permafrost degradation on the species diversity. During the permafrost degradation,the family number and species richness decreased,and the hygrophytes and mesophytes were gradually replaced by meso-xerophytes and xerophytes. Permafrost degradation lowered the species diversity and primary productivity,giving negative effects on the stability of alpine grassland ecosystem. There was a close parabolic relationship between species diversity and primary productivity.

Key words: Spartina alterniflora, Emergy analysis, Added loop, Ecological engineering