西南林业大学学报2025，Vol.45Issue(1)：106-116,11.DOI:10.11929/j.swfu.202310024
1995-2019年香格里拉市高寒草甸景观格局和潜在生产力变化特征研究
Changes in Landscape Patterns and Potential Productivity of Alpine Meadows in Shangri-La from 1995 to 2019
摘要
Abstract
In this study,the distribution of alpine meadows in Shangri-La from 1995 to 2019 was firstly ex-tracted based on Landsat winter remote sensing images,then the landscape pattern indices of alpine meadows were calculated,and the potential net primary productivity(NPP)of alpine meadows was estimated based on annu-al temperature and precipitation conditions.Finally,the changes in these above indices and their relationships with climatic and socioeconomic factors were analyzed.The results showed that from 1995 to 2019,there was a trend of climatic warming and drying in Shangri-La.And the indices of socio-economic in this region developed rap-idly.Overall,the area of alpine meadows in Shangri-La declined from 1058.73 km2 in 1995 to 755.35 km2 in 2019,and the potential NPP of alpine meadows declined from 96.1×104 t/a to 58.7×104 t/a.These 2 indicators were negatively correlated with annual temperature,population size,GDP of primary industry,GDP of secondary industry,GDP of tertiary industry,and the inventory of large livestock,while they were positively correlated with annual precipitation.Moreover,the changes in area and potential NPP of alpine meadows showed obvious spatial heterogeneity,and this heterogeneity was highly overlapped with the spatial heterogeneity of climatic warming and drying.And the landscapes of alpine meadows in Shangri-La showed a trend of fragmentation,and the de-gree of fragmentation was positively correlated with annual temperature and socio-economic indicators,but negat-ively correlated with annual precipitation.This study shows that the alpine meadows in Shangri-La are undergo-ing significant degradation under the background of climate warming and drying and the increased intensity of an-thropogenic disturbances.关键词
香格里拉/高寒草甸/景观格局/净初级生产力/气候暖干化Key words
Shangri-La/alpine meadow/landscape pattern/net primary productivity/climatic warming and drying分类
农业科技引用本文复制引用
王晓蓉,崔媛,张勇,许建伟,岳海涛,吴凯婷,曾昊,武慧敏..1995-2019年香格里拉市高寒草甸景观格局和潜在生产力变化特征研究[J].西南林业大学学报,2025,45(1):106-116,11.基金项目
第二次青藏高原综合科学考察研究项目(2019QZKK0307)资助 （2019QZKK0307）
国家自然科学基金项目(31901394,31560181)资助. （31901394,31560181）
