夹金山脉大熊猫栖息地土地利用变化对生境质量的影响

Impacts of Land Use Change on Habitat Quality in Jiajin Mountains Giant Panda Sanctuary

为探明土地利用变化对生境质量的影响,以夹金山大熊猫栖息地为研究对象,选取2001、2009、2016、2021年四期卫星数据,以及土地利用变化轨迹、生态系统服务和权衡的综合评估模型(InVEST)等方法,分析夹金山脉大熊猫栖息地近20 a土地利用时空演变及对生境质量的影响。结果表明:(1)土地利用变化轨迹中稳定型占77.99%,整体波动较小,单一型占15.79%,主要为耕地向林地和草地的转移及建设用地对耕地和林地的侵占,波动型占4.81%,表现在耕地、林地、草地、建设用地间的交替变化;(2)生境质量整体波动较小,较高以上等级的生境质量占比超过62%,空间上呈现中间低,四周高,外围低的环状分布特征;(3)生境质量变动主要受耕地和林地减少、建设用地增多的影响。

To explore the response of habitat quality to land use change,taking Jiajin Mountains Giant Panda Sanctuary(JMGPS)as the research object,four satellite data from 2001,2009,2016,and 2021 were selected to analyze the temporal and spatial evolution of land use and its impact on habitat quality of Jiajin Mountains in recent 20 years by using methods such as land change trajectory,and invest model.Results show that:(1)In the track of land-use change,the stable type accounts for 77.99%,the overall fluctuation is slight.The single type accounts for 15.79%,mainly the transfer of cultivated land to forest land and grassland and the occupation of construction land on cultivated land and forest land.The fluctuating type accounts for 4.81%,which is manifested in the alternating change among cultivated land,forest land,grassland,and construction land.(2)The overall fluctuation of habitat quality was slight,the high-grade and more high-grade habitat quality accounted for more than 62%,Spatially it showed a circular distribution characteristic of low in the middle,high around,and low in the periphery.(3)The habitat quality is low in the middle,high around and low in the periphery.The overall habitat quality is high.The change is mainly affected by reducing cultivated land and forest land,and the increase of construction land.