摘要
土地利用/覆被变化是人类活动对生态系统影响最直接的表现,土地利用方式的改变会引起生境斑块的破碎、退化甚至消失,从而直接影响一个区域生境质量的好坏。以石羊河上游祁连山区为研究对象,通过对1986-2016年土地利用变化的分析,对生境质量进行评估。结果表明:石羊河上游土地利用类型以草地、林地以及未利用地为主;生境退化类型以无明显退化和轻微退化为主;面积的大部分为中等以上生境类型,主要集中在西部和南部地区。1986-2000年石羊河上游生境退化面积与生境质量变差的面积都在增加,但其增加速度渐缓,2000年之后好的生境类型面积有所增加。由此可见,石羊河上游的生境质量有向好的方向发展的趋势。
Land use/cover change is the most direct expression of the influence of human activities on the ecosystem.The change of land use will cause the fragmentation,degradation and even disappearance of the habitat patches,which will directly affect the quality of the habitat in a region.Based on an analysis of the land use change from 1986 to 2016 in Qilian mountain areas in the upper reaches of Shiyang River,this paper evaluates its habitat quality.The results show that the main land use types in the upper reaches of the Shiyang River are grassland,woodland and unused land,the main habitat degradation types are non-obvious degradation and slight degradation,and most of the areas are medium or above habitat types,mainly in the west and south.From 1986 to 2000,the area of degraded habitat and the area of poor habitat quality in the upper reaches of Shiyang River increases,but the rate of increase gradually slows down,and the area of good habitat types increased after 2000.Therefore,the habitat quality in the upper reaches of the Shiyang River has a tendency to develop in a good direction.
作者
雷莉
LEI Li(Wuwei Vocational College,Wuwei 733000,Gansu Province,China)
出处
《中国农村水利水电》
北大核心
2022年第2期43-45,共3页
China Rural Water and Hydropower
