The driving factors of ecosystem services and their tradeoffs in the Manas River basin of Xinjiang,China
In order to alleviate the contradiction between agricultural economic development and ecological protection in the oasis of Manas River basin,the thesis quantified the spatial and temporal distribution characteristics of carbon stock(CS),water yield(WY),and soil retention(SR)services by using the InVEST model,based on which we analyzed the tradeoffs between the changes of ecosystem services(ESs).Multi-scale geographically weighted regression(MGWR)model was used to analyze the spatial relationships between ecosystem changes and their trade-offs and drivers were revealed.The results were as follows:from 2000 to 2015,cropland and built-up land area increased by 50.81%and 91.95%,and unused land and grassland decreased by 16.88%and 6.71%.CS and WY increased by 4.76%and 37.12%,while SR decreased by 9.94%.The trade-off relationship between CS,SR,and WY was heterogeneous in spatial distribution,and ESs tradeoffs high-value regions were mountainous area in the south.The intensity and properties of the correlation between the changes and tradeoffs of ESs and influencing factors were heterogeneous in spatial distribution,and dynamic degree of comprehensive land use changes,vegetation coverage changes,and soil organic carbon are the main driving factors of the changes and tradeoffs of ecosystem services.The study suggests that planting grassland in the mountainous areas of the Manas River basin and establishing water resource protection zones in the oasis areas while increasing the investment in oasis agricultural science and technology are effective ways to promote the sustainable supply of ecosystem services and alleviate the contradiction between oasis agricultural development and ecological protection.
ecosystem servicestrade-offsmulti-scale geographically weighted regressionInVEST modelManas River basin
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