Factor analysis of ecosystem services value in Huangfuchuan basin

The ecosystem services value is currently a research hotspot in ecology, ecological economics etc. In this article, 16 ecosystem types are selected as factor variables, and ecosystem services value per unit area in Huangfuchuan basin are used to analyze the principal component and to study the key factors that affect ecosystem services value in Huangfuchuan basin. The research results showed that firstly, forest-grass factor, sandy-bare-constructive factor, waters factor and farming factor are the key factors that affect ecosystem services value in Huangfuchuan basin. Secondly, high coverage grassland, shrub, middle coverage grassland, forestland, woodland, low coverage grassland etc have larger contribution to forest-grass factor, forestland and grassland have the greatest contribution to ecosystem services value in Huangfuchuan basin; sandy land, gobi, bare land, urban and rural residential land and other construction land (transportation, mining) etc have larger contribution to sandy-bare-constructive factor, but play a negative function on ecosystem services value in Huangfuchuan basin; rivers and canals, reservoirs and beach have larger contribution to waters factor, which mainly represent the waters condition of basin; farming factor mainly reflects basic condition of cropland-dry land, other wooded lands (garden, etc) and cropland-paddy. Thirdly, soil erosion is extremely serious in Huangfuchuan basin, thus strengthening ecological construction (returning farmland to forest and grass, soil and water conservation engineering, ecological migration, etc) is important way to improve the basin ecosystem services value.