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Spatial-temporal changes and tradeoff/synergy relationship of ecosystem services in Xinjiang.

WANG Xiao-feng1,2*, CHENG Chang-wu1, YIN Li-chang3, FENG Xiao-ming4, WEI Xin-dong1   

  1. (1School of Earth Science and Resources, Chang’an University, Xi’an 710054, China; 2Shaanxi Key Laboratory of Land Consolidation, Xi’an 710054, China; 3Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 4Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China).
  • Online:2020-03-10 Published:2020-03-10

Abstract: We quantitatively estimated net primary productivity (NPP), soil conservation and water yield from 1982 to 2015 in Xinjiang based on CASA model, RUSLE model, and InVEST model. The spatial analysis and hot spot analysis were used to characterize the regional variation of ecosystem services. The Sen’s method was used to analyze the temporal and spatial variations of ecosystem services. The tradeoffs and synergies among three ecosystem services were explored based on partial correlation analysis. From 1982 to 2015, the variation of annual NPP in Xinjiang was relatively stable with an increasing trend, whereas the inter-annual variation of soil conservation and water yield fluctuated greatly. Both soil conservation and water yield were positively correlated with NPP. The changes of soil conservation and water yield were synergistic, and the strong synergies being dominant. Over the whole examined period, the synergistic interaction-between NPP and soil conservation tended to weaken in the whole province. The relationship between NPP and water yield transferred from tradeoffs to synergies. The synergies between soil conservation and water yield were strengthened first and then weakened.