Land use structure change and response from ecosystem service value in the northwest arid regions: taking Minle County as a case study

Based on land use change data and the second land use survey data, the grey prediction method and average growth rate method were applied to all types of land use in Minle County's planning area, in order to carry a forecast. Replying farmland ecosystem biomass factors and revising formula correction factor coefcient of ecological service value equivalency factors, we analyzed the response relationship of land use structure and ecosystem services value change. The results showed that land use structure diversity index and evenness index were increasing while the dominance index became lower; land use itself was more diversified and homogenized.The forest constitued the greatest contribution value of ecosystem services, while land use value of ecosystem services was in a overall increasing trend. Land use structure and land use ecosystem service value were linearly correlated. By increasing the area of forest, garden and other ecological land and by improving land use intensity,the land use structure adjustment was conducive to promoting the diversification of land use and homogenization.This can increase the stability of ecosystems and improve the economic value of ecosystem services and, at the same time, djust the land use structure and guide more rational land use.