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放牧条件下高原鼠兔扰动对高寒草甸植物群落特征的影响

许华磊1,2 王溪1 刘伟1   

  1. (1中国科学院西北高原生物研究所,青海省青藏高原特色生物资源研究重点实验室,西宁810001)     
    (2中国科学院大学,北京 100049)
  • 出版日期:2019-09-30 发布日期:2019-11-27
  • 基金资助:
    国家自然科学基金(30970498);国家科技支撑计划项目(2012BAC08B03);青海省重点实验室发展建设专项(2017-ZJ-Y10)

Effects of disturbance of plateau pika(Ochotona curzoniae) on plant community in alpine meadow under grazing condition

XU Hualei 1,2, WANG Xi 1, LIU Wei 1   

  1. (1 Northwest Institute of Plateau Biology,Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources,Chinese Academy of Science, Xining 810001, China)
    (2 University of Chinese Academy of Science, Beijing 100049, China)
  • Online:2019-09-30 Published:2019-11-27

摘要:

在高寒草甸生态系统中,大型草食动物放牧是重要的管理方式之一,对草地生物多样性起着关键的驱动作用。高原鼠兔是高寒草甸生态系统中生物多样性的重要组成成分,对生态系统的食物网结构以及其功能与稳定性起着关键作用。探明放牧条件下高原鼠兔扰动对高寒草甸的影响,对于高寒草甸建立合理的放牧提供理论依据,为鼠害的防治提供科学依据有一定的现实意义。2017年5—9月在青海省海北州祁连县矮嵩草草甸,以高原鼠兔为研究对象,通过小区控制研究放牧条件下高原鼠兔扰动对高寒草甸植物功能群植物特征的影响。结果显示高原鼠兔扰动降低了除杂类草以外的各植物功能群的高度;同时显著降低了禾本科、豆科功能群盖度及总盖度,而杂类草功能群的盖度有增加的趋势。另外,我们的结果也发现高原鼠兔扰动对各植物功能群生物量和重要值的影响不显著。该研究表明放牧条件下高原鼠兔扰动在一定程度上对杂草群落特征具有积极的作用,对其它功能群的群落特征具有抑制作用

关键词: 干扰, 高原鼠兔, 植物功能群, 植物高度, 植物盖度, 植物重要值

Abstract:

In the alpine meadow ecosystem, Grazing is one of the important management methods, which plays a key role in the biodiversity. Plateau pika is an important component of the biodiversity in the alpine meadow ecosystem and plays a key role in the structure of the food network and its function and stability. The influence of plateau pika on the alpine meadow under the influence of grazing disturbance can be proved which provides a theoretical basis for the establishment of reasonable grazing in alpine meadows, and a scientific basis for the prevention and control of rodent pests with certain practical significance. From May to September 2017 in the meadow in Qilian County, Haibei Prefecture, Qinghai Province, we studied the effects of plateau pikas disturbance on the plant functional groups of alpine meadow functional groups under the control of grazing conditions. We found that the disturbance of plateau pika decreased the height of the most plant functional groups except forbs, and lightly increased the coverage of the forbs, but significantly decreased the coverage of functional groups of grasses, legume and total plants . However, we also found the disturbance of plateau pikas had no significant effect on the biomass and important value of plant functional group. Our results suggest that disturbance of the plateau pika has partly positive effect on the community characteristics of forbs, and inhibits the community characteristics of other functional groups under grazing conditions.

Key words: Disturbance, Plateau pikas, Plants functional group, Plants height, Plants coverage, Plants important value