基于多源遥感的大熊猫国家公园光污染时空动态与生态边缘效应

[Objective]Protected and wild areas are increasingly encroached upon by light pollution.Giant Panda National Park,the largest national park spanning from north to south in China,assesses its light pollution and explores characteristics that are of positive value for biodiversity conservation,national park management,and sustainable development.Therefore,this study analyzed the spatial and temporal trends of light pollution changes in Giant Panda National Park over the past 30 years;assessed whether human activities and land development intensity affect light pollution levels in Giant Panda National Park.[Method]In this study,light pollution levels were assessed using the average nighttime radiation intensity from nighttime satellite remote sensing images.A landscape index was measured based on landscape ecology methods to assess light pollution characteristics.Floor area and population density within the park and within a 10 km buffer zone outside the park were calculated to assess the intensity of land development and human activities inside and outside the park.[Result]Light pollution in the Giant Panda National Park has increased significantly over the past 30 years,with a 17-fold increase in the average NTL and the area of light-polluted patches,and a more than 3-fold rise in average light intensity.Areas with complex park boundaries are more significantly affected by light pollution.Mean nighttime radiation is more significantly influenced by buildings and human activities outside the park.Exterior artificial light is the main source of light pollution in Giant Panda National Park.Light pollution can be considered as an ecological edge effect in areas where land development is severely restricted.[Conclusion]National park planning should keep the shape of park boundaries as simple as possible and reduce the number of park-shaped patches.Central planning and management of human activities and construction in national parks are carried out in various ways.Artificial light control is needed both inside and outside the park to protect biodiversity from light pollution.The results of this study will provide a reference for implementing national park planning and management,light pollution prevention,and guidance measures.