| Ecosystem as humans in developing irreplaceable natural assets,its service value is the needs of human activities on the ecosystem provides’ satisfaction with the products and services,regional land use change and its study on the value of ecosystem services,to identify the influence of the regional ecological environment and optimize the national spatial pattern is of great significance.Based on the land use survey data,the ecosystem service value model of Yanshan County was established to analyze the spatio-temporal change of land use,the change intensity and its impact on ecosystem service value.the land use change and its impact on ecosystem service value.The temporal and spatial variation characteristics and internal correlation of ecosystem service value were described.Further,from the perspective of the future,the land use change and the corresponding ecosystem service value change in 2034 are simulated.The main conclusions are as follows:(1)The land use types and areas in Yanshan County changed to different degrees from2009 to 2019.The demand for economic construction led to a large amount of construction land occupying the area of cultivated land,forest land and grassland,and the grassland decreased most significantly.At the same time,land conversion in Yanshan county is mainly affected by economic development,land consolidation and "returning farmland to forest" policies.The landscape of Yanshan county is fragmented,complicated and irregular.The landscape type level index and landscape level index confirm some negative results of land use management in yanshan county in the past 10 years,and it is necessary to improve the land use structure of rural homestead,industrial and mining,and road network.(2)Through the statistics and visual expression of ecosystem service value in Yanshan County in 2009,2014 and 2019,the spatial autocorrelation of ecosystem service value was explored by analyzing the increase and decrease of different functional services and different levels of ecosystem service value at corresponding time points;The spatial distribution of ESV in Yanshan county is obviously different,showing a significant spatial pattern of high in the south and low in the north,high in the east and west,and low in the middle.On the whole,ESV in Yanshan County showed a trend of sharp increase first and then sharp decline during the study period.Forestland,because of its absolute advantage in area,provides 84% of the total ESV.ESV is generally above average.(3)The land use status and ecosystem service value of Yanshan County in 2034 were simulated under four scenarios: natural development scenario,cultivated land protection scenario,ecological protection scenario and economic development scenario.The value of ecosystem services decreased in all scenarios.In natural development and economic development scenarios,a large amount of cultivated land and forest land were sacrificed,resulting in high LOSSES of ESV.The simulation results are of great significance for identifying the impact of regional ecological environment and optimizing territorial spatial pattern in advance. |
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