围栏对新疆山区草地植物群落多样性的影响

Impacts of Fencing on the Plant Community Biodiversity of the Typical Mountainous Lawn in Xinjiang

通过对新疆典型山区草地——高寒草甸、亚高山草甸和山地草原的野外实地监测,在草原围栏内外植物群落生物量、高度、盖度、频度以及生物多样性指数的研究结果比较基础上,讨论了围栏这一人为手段对草原生态系统植物群落的影响:有利于牲畜轮牧食物资源量的增加,但是导致植物群落生物多样性减少。

The field monitoring of the typical mountainous lawn in Xinjiang such as down-land, subalpine meadow and alpine meadow was conducted to comparatively analyze plant communities＇, aboveground biomass, plant height, plant coverage, plant frequency and plant biodiversity outside and inside fences, then discuss the impact of fencing, the artificial means, on the plant community in grassland ecosystem. The field investigation was made to prove that the fencing in grassland could restore further development of local livestock husbandry,but lead to decreasing biodiversty.