Temporal and spatial evolution of ecosystem service value in Hehuang Valley
Land use type is a key factor affecting ecosystem service value(ESV).Analyzing the re-sponse degree of land use change to ESV can provide scientific basis for ecological environment pro-tection and sustainable development in the ecologically fragile areas.Based on the land use data from 2000 to 2015 in Hehuang Valley,the spatio-temporal changes of land use change and ESV are ana-lyzed from 2000 to 2035 using mixed-cell cellular automata(MCCA)model and improved equiva-lent factor method.The results are as follows:(1)From 2000 to 2035,the main types of land use are arable land,grassland and forest land,with an overall decreasing trend in arable land and grassland area,and an increasing trend in construction land area.(2)From 2000 to 2015,the ESV in Hehuang Valley shows an evolutionary trend of first increasing,then decreasing,and then increasing again in time,which exhibits a heterogeneous distribution pattern in space.The medium to high value areas are mainly concentrated in grassland and forest areas,while low value areas are mainly concentrated in the city center and its surrounding areas.(3)The ESV of natural trend and ecological protection scenarios in Hehuang Valley in 2035 shows an upward trend compared to 2015,while the economic development scenario slight decreases.The results can provide scientific reference for ecological en-vironment protection and sustainable development in Hehuang Valley and similar areas.
ecosystem service value(ESV)mixed-cell cellular automata(MCCA)modelscenario simulationHehuang Valley