干旱区生态环境知识资源中心(Arid): 气候变化对长江源地区高寒草甸生态系统的影响

Arid

	气候变化对长江源地区高寒草甸生态系统的影响
其他题名	IMPACTS OF GLOBAL CHANGE ON THE ALPINE MEADOW ECOSYSTEM IN THE SOURCE REGION OF THE YANGTZE RIVER
	吕新苗 1; 郑度 2
ISSN	1004-8227
出版年	2006
卷号	15 期号:5 页码:603-607
中文摘要	近十几年来,长江源区气候暖干化趋势明显,冰川退缩、湖泊萎缩、草场退化、土地沙漠化、水土流失等环境问题日益严重.高寒草甸是长江源地区主要的植被类型之一,在全球变化影响下,以耐低温寒冷的嵩草属(Kobresia)植物为建群种的高寒草甸将面临更严重的生态胁迫.以长江源地区高寒草甸生态系统为研究对象,采用国际通用的生物地球化学模型模拟高寒草甸生物量、生产力和土壤有机质等的动态变化,并综合考虑人类活动对生态系统生产力和营养元素生物地球化学循环的影响,探讨了全球气候变化对高寒草甸生态系统可能造成的影响.
英文摘要	The source region of the Yangtze River, located in the middle region of the Tibetan Plateau, is characteristic of high-altitude and cold environment, and is a sensitive area to global change. As a major part of the National Three River Sources Nature Reserve, it is one of the principle areas of alpine wetlands as well. While in recent decades, in the influence of improper human activities and global climate changes, climate in this region has become warmer and drier in an obvious way. Accordingly, the glaciers and lakes have been retreating. Grassland has been degrading because of over-grazing. As a result, land desertification and soil erosion are increasingly expanding. These will be a threat to the Yangtze River Valley, and to the ecological security of the whole Yangtze River Basin. The alpine meadow is one of major high-altitude cold ecosystems in this region. In the influence of global change, undoubtedly, the alpine meadow dominated by cold resistant Kobresia plant will have to face ecological menace. Therefore, to discuss the impact of global change on the alpine meadow is of high value for understanding global change and reducing its negative influence. The alpine meadow in the source region of the Yangtze River is taken as a study case in this paper. Firstly, the ecological and environmental characters in the source region were clarified. Then the authors employed CENTURY model, a popular biogeochemistry model to simulate alpine meadow ecosystem, in terms of its long-term dynamics in productivity and carbon balance. Grazing, a main human activity in the plateau, was taken into account to simulate probable impacts on the ecosystem as well. In accordance with climate change scenarios from RCMs, possible impacts of climate change on ecosystem were analyzed. Finally, proper adaptation countermeasures were proposed in order to reduce the negative impact of climate change.
中文关键词	高寒草甸 ; 气候变化 ; CENTURY模型 ; 长江源地区 ; 青藏高原
英文关键词	the alpine meadow global climate change CENTURY model the Source Region of the Yangtze River Tibetan Plateau
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MULTIDISCIPLINARY SCIENCES
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:2424326
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220362
作者单位	1.中国科学院青藏高原研究所, 北京 100085, 中国; 2.中国科学院地理科学与资源研究所, 北京 100101, 中国
推荐引用方式 GB/T 7714	吕新苗,郑度. 气候变化对长江源地区高寒草甸生态系统的影响[J]. 中国科学院地理科学与资源研究所,2006,15(5):603-607.
APA	吕新苗,&郑度.(2006).气候变化对长江源地区高寒草甸生态系统的影响.,15(5),603-607.
MLA	吕新苗,et al."气候变化对长江源地区高寒草甸生态系统的影响".15.5(2006):603-607.

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