Evaluation And Analysis Of Influencing Factors Of Ecosystem Service Value Change In Xinjiang Under Different Land Use Types

Xinjiang is located in the northwest frontier.The temporal and spatial pattern characteristics of regional land use,the profit and loss characteristics of land use change on Ecosystem Services Values(ESV)and the driving mechanism of ecosystem services value are analyzed to provide a theoretical basis for further optimizing the regional ecological environment.and practical support.This paper takes Xinjiang mountain-oasis-desert interlaced transition zone as the research target area,uses 3S technology to extract land use data and calculates the dynamic degree of land use.From 1990 to 2020,the temporal and spatial distribution pattern characteristics of land use change and ecosystem service value in the study area,deeply explore the driving mechanism of ecosystem service value,clarify the relationship between land use change and ESV,and explore the factors that affect the change in the spatial differentiation pattern of ESV in the study area.important influence factors.Concluded as follow:(1)From 1990 to 2020,the land use in Xinjiang showed a relatively drastic change,the area of cultivated land and construction land increased,and the area of forest grassland,water area and unused land decreased;the dynamic change of land use was:construction land>cultivated land>forest land>water area>Grass>Unused Land Features.From 1990 to 2020,the land use conversion in Xinjiang was frequent,mainly manifested in the transfer of cultivated land and construction land,supplemented by the transfer of forest grassland,water area and unused land.From the perspective of different zoning units,the land use change in the area north of the Tianshan Mountains is characterized by an increase in the area of grassland,cultivated land and construction land,and a decrease in the area of forest land,water area and unused land.The area of forest,grassland and water area decreased mainly.(2)From 1990 to 2020,the total value of ESV in Xinjiang showed a trend of first increase and then decrease,with an average annual contribution value of about 13730.33×10~8yuan,and a 30-year cumulative loss of about 1741.00×10~8yuan,of which the water area value loss was the largest,and the increase in construction land was the largest.Significantly.The first-level classification of ESV in Xinjiang and each ecological unit is as follows:regulation service>support service>supply service>cultural service;the value of each single ecosystem service is mainly based on functions such as waste treatment and water conservation.The general spatial distribution pattern of ESV is obvious,showing a distribution trend of"high in the north and southwest,and low in the middle and southeast";the ecosystem service value shows obvious spatial correlation and aggregation.(3)The geographic detector model can better detect the spatial differentiation of different sub-regions and reveal its driving mechanism.The single-factor influence degree of ESV in Xinjiang can be ranked as follows:HAI>NDVI>precipitation>land average GDP>air temperature>elevation>population density>slope.The interaction and synergy of natural factors and social and economic factors is better than the spatial differentiation effect of single factor affecting regional ecological service value.