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青藏高原草地生态系统对气候变化的响应

王常顺1,2,孟凡栋1,2,李新娥1,姜丽丽1,白玲3,汪诗平1**   

  1. (1中国科学院青藏高原研究所高寒生态学与生物多样性重点实验室, 北京 100101; 2中国科学院大学, 北京 100049; 3西藏大学, 拉萨 850000)
  • 出版日期:2013-06-10 发布日期:2013-06-10

Responses of alpine grassland ecosystem on Tibetan Plateau to climate change: A mini review. 

WANG Chang-shun1,2, MENG Fan-dong1,2, LI Xin-e1, JIANG Li-li1, BAI Ling3, WANG Shi-ping1**   

  1. (1Key Laboratory of Alpine Ecology and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China, 2 University of Chinese Academy of Sciences, Beijing 100049, China; 3Tibet University, Lhasa 850000, Tibet, China)
  • Online:2013-06-10 Published:2013-06-10

摘要: 青藏高原高寒草地生态系统对气候变化高度敏感,其如何响应和反馈气候变化一直以来受到极大关注。本文系统综述了近5年来有关青藏高原草地生态系统在物候、生产力、碳循环等方面对气候变化的响应过程以及应对气候变化的适应性管理的最新研究成果,发现气候变化对高寒草地生态系统的诸多影响还存在很大的不确定性。多数研究结果表明,增温使高寒草甸的植被物候提前和初级生产力水平提高,而高寒草原有相反的影响趋势,说明不同地域、不同群落类型对不同季节温度变化的响应模式不同。而气候变化对物种多样性和碳循环有关过程的影响结果尚没有一致的结论,时空尺度和方法上的差异可能是导致不同结果的主要原因。因此,建议在增强时空异质性的响应与反馈研究的同时,更需要加强生态过程和机理的研究。

关键词: 全磷储量, 土壤数据源, 全磷密度, 苏北地区, 制图比例尺

Abstract: Alpine grassland ecosystems on Tibetan Plateau are highly sensitive to climate change. How these ecosystems response to climate change is a great concern. Based on the past five years researches, this paper briefly reviewed the responses of these ecosystems to climate change from the aspects of phenology, plant productivity, and carbon cycle, and the adaptive management to climate change. There are inconsistent conclusions so far. Most of the researches indicated that warming advanced the plant phenology and increased the primary productivity of alpine meadow, while opposite trends were observed for alpine steppe, suggesting that different plant communities in different regions could have different modes in response to the temperature change in different seasons. Similarly, there are controversial conclusions about the responses of plant species diversity and carbon sink/source to climate change because of the differences in spatial and temporal scales and research methods. Therefore, further researches are needed to integrate the spatial and temporal researches and to strengthen the studies of ecological processes and mechanisms.

Key words: total phosphorus storage, mapping scale, North Jiangsu., total phosphorus density, source of soil data