Study on Characteristics and Changes of Landscape Pattern in Henan Section of Yiluo River Basin
[Purposes]This paper studies the temporal and spatial variation characteristics of landscape pattern in the Henan section of the Yiluo River Basin,which has important guiding significance for the stability of its ecosystem and the protection of the ecological security of the basin.[Methods]This paper is based on Globeland30 land cover data from 2000,2010 and 2020.SRTMDEM was used to extract the extent of the Henan section of the Yiluo River Basin.By Fragstats software,nine landscape pattern index were obtained at class-level and landscape-level in the Henan section of Yiluo River Basin.[Findings]The index shows that cultivated land and forest are substrates in the Yiluo River basin.According to the expo-nential changes at the class-level,landscape types can be divided into three categories.The first cat-egory is forest,grassland and water body,showing a gradual decline in fragmentation in the past 20 years;The second category is cultivated land and wetland with increasing fragmentation;The third type is artifi-cial surface,and the degree of fragmentation first increases and then decreases.[Conclusions]The expo-nential changes at the landscape level indicate that the landscape fragmentation of the Yiluo River Basin has decreased in the past 20 years.The heterogeneity decreases and the ecology tends to be good.There are dominant types in the Yiluo River Basin,and the landscape connectivity is good and remains stable.
万方数据
维普
