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鼠类活动对高寒草甸植物群落及土壤环境的影响

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三江源区是青藏高原的重要组成部分,素有"中华水塔"之称,同时也是世界高海拔区生物多样性最丰富、最集中的地区,有"高原生物基因库"之称.但由于近年来气候变暖、冰川退缩、过度放牧等因素致使三江源区草地退化严重,其中频繁的鼠类活动无疑进一步加剧了草地退化的速度和进程.鼠类活动对三江源区整个草甸生态系统既有消极的作用,又有积极作用,但是目前尚缺乏系统科学的量化研究.本文在对三江源区典型区域青海省果洛州主要鼠类种群调查和查阅大量文献资料的基础上,探讨了鼠类活动对三江源区高寒草甸植物群落及土壤环境的影响,结果表明,维持适宜的鼠类种群密度对于三江源区高寒草甸的可持续发展和草地资源保护具有重要的作用.
Effects of rodents activities on plant community and soil environment in alpine meadow
The Three-River Headwaters Region is main part of Qinghai-Tibetan plateau, known as China’ “watertower”, and is the assembling region with rich biodiversities and a gene pool of plateau biology. However, the climate warming, glacier decreasing, over grazing cause the grassland to degenerate in the recent years, and high-intensity rodents activities undoubtedly exacerbated the pace and process of grassland degradation. Rodent activities not only play positive role in the alpine meadow ecosystem but also play negative role in the alpine meadow ecosystem, and scientifically qualifying threshold of rodent activities is urgent. Based on field survey data in Guoluo autonomous prefecture, Qinghai province, and many documents, this study summarized the effectiveness of rodent activities on plant community and soil environment in alpine meadow, and suggested that the rational rodent population density benefited sustainable utilization of grassland resources and grassland conservation.

Qinghai-Tibetan Plateauplateau pikasalpine meadow ecosystemrational rodent density

孙飞达、龙瑞军、郭正刚、刘伟、干友民、陈文业

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四川农业大学草业科学系,四川,雅安,625014

兰州大学青藏高原生态系统管理国际中心,甘肃,兰州,730020

甘肃省林业科学研究院,甘肃,兰州,730020

青藏高原 高原鼠兔 高寒草甸生态系统 鼠群密度

国家自然科学基金重点项目

30730069

2011

草业科学
中国草原学会 兰州大学草地农业科技学院

草业科学

CSTPCDCSCD北大核心
影响因子:0.854
ISSN:1001-0629
年,卷(期):2011.28(1)
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