地理科学进展 ›› 2012, Vol. ›› Issue (1): 123-128.doi: 10.11820/dlkxjz.2012.01.016

• 陆地生态系统碳收支专栏 • 上一篇    

青藏高原草地生态系统碳收支研究进展

王军邦1, 黄玫1, 林小惠2   

  1. 1. 中国科学院地理科学与资源研究所,北京 100101;
    2. 江西师范大学地理与环境学院,南昌 330022
  • 收稿日期:2011-10-01 修回日期:2012-02-01 出版日期:2012-01-25 发布日期:2012-01-25
  • 基金资助:
    中国科学院西部行动计划(三期)项目(KZCX2-XB3-08-01);国家自然科学基金项目(40975045);国家重点基础研究发展计划课题(2009CB421105)。

Review on Carbon Budget of the Grassland Ecosystems on the Qinghai-Tibet Plateau

WANG Junbang1, HUANG Mei1, LIN Xiaohui2   

  1. 1. Institute of Geographic Sciences and Nature Resources Research, CAS, Beijing 100101, China;
    2. School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China
  • Received:2011-10-01 Revised:2012-02-01 Online:2012-01-25 Published:2012-01-25

摘要: 陆地生态系统碳收支仍然是当前全球气候变化研究的重要内容,青藏高原作为全球气候变化的敏感区,使青藏高原草地生态系统在区域碳收支平衡中占有主导地位,但研究方法等不同使得碳收支估算结果存在很大的不确定性。气候变暖在一定程度上提高了高寒草地生态系统的植被初级生产力和生物量,由此补偿了气候变暖导致的土壤有机碳分解释量,使青藏高原草地植被仍然发挥着碳汇的功能。而人类放牧活动对草地生态系统的影响较为复杂。因此,如何区分气候变化和人类活动对生态系统的影响机制,定量评价未来气候变化和人类活动影响下,青藏高原生态系统碳源/汇格局的可能变化,是一个非常重要的研究方向,也是一个极大的挑战。

关键词: 草地生态系统, 草地退化, 气候变暖, 青藏高原, 碳收支

Abstract: Terrestrial ecosystem carbon budget is a hot topic in the research on global climate change. The grassland of Qinghai-Tibet Plateau, which is sensitive to climate change, plays an important role in the regional carbon balance. However, there is great uncertainty in the estimation on the spatial-temporal pattern of carbon budget due to different methods and some other reasons. To some extent, climate warming results in the increase of vegetation primary productivity and biomass in the alpine meadow ecosystem, which may compensate the decomposition release of soil organic carbon. Hence, the Qinghai-Tibet Plateau grassland still functions as a carbon sink. The effects of human activities, such as overgrazing, on grassland ecosystems are very complex. Therefore, under the impacts of future climate change and human activities, how to distinguish the influence of climate change from that of human activities on ecosystems, and how to quantitatively assess carbon source / sink pattern, are a very interesting research field, but also a great challenge, especially on the plateau.

Key words: carbon budget, climate warming, grassland degradation, grassland ecosystem, Qinghai-Tibet Plateau