关键词: 生境质量; InVEST模型; 景观格局; 赤水河流域; 山地流域;

Abstract: Habitat quality is an important component in the study of ecosystem services.Analyzing spatial and temporal characteristic in habitat quality caused by landscape patterns change can provide a scientific basis for landscape optimization and ecological civilization construction.Taking the Chishui River Basin in Guizhou Province as an example, the spatio-temporal characteristics of habitat quality and the coupling relationship with the landscape pattern based from 1990 to 2015 were discussed based on the InVEST model.The results showed that:(1) From 1990 to 2015,the characteristics of land use change in the study area were mainly manifested in conversion among cultivated land, forest land and grassland, and the occupation of construction land.These changes led to an increase in the fragmentation of the watershed and a decrease in landscape connectivity.(2) Habitat quality and habitat degradation in the study area decreased from 0.697 96 and 0.133 96 in 1990 to 0.695 62 and 0.113 15 in 2015.Hot spot analysis showed that the cold spot areas of habitat quality were mainly distributed in the upper reaches of the study area and around towns, and the hot spots of habitat quality were mainly distributed in the lower reaches of the basin where vegetation was distributed.(3) The basin's habitat quality and habitat degradation showed obvious correlation with and landscape pattern index in different ways.

Key words: habitat quality; InVEST model; landscape pattern; Chishui River Basin; mountainous watershed;