Correlation between richness of land cover types and landscape function in Jinghe County

Abstract

Abstract In this study, jinghe County was selected as the study area, and the correlation between land cover richness and landscape function was analyzed based on landscape index from 2003 to 2017. According to the results, landscape diversity is an important driving factor of vegetation productivity and phenology, and its influence on the environmental conditions of maintaining relatively stable landscape pattern across the whole range. The landscape spatial structure in the low-value area (the AREA with DEM less than 800m) is more stable and the fragmentation degree is lower, while the landscape spatial structure in the high-value area (mainly distributed in the DEM2500 m area) is more complex and the fragmentation degree is higher, which is to some extent with the increase of the elevation. The overall heterogeneity and fragmentation of cultivated land were low, and the spatial pattern was stable. The mean value of EVI increased significantly with the increase of vegetation diversity, and the EVI_GS showed the same trend, while the length of growing season decreased significantly. The landscape richness in the study area was significantly positively correlated with Slope and Alt (r = 0.47, P < 0.01). EVI_AVG and EVI_GS were negatively correlated with slope direction and Alt (r = 0.58, P < 0.01, R = 0.54, P < 0.1; Was positively correlated with temperature and precipitation (r = 0.31, P < 0.1; R = 0.34, P < 0.1), indicating that the main vegetation distribution in the study area is obviously correlated with the terrain, and is greatly influenced by the terrain constraints.