基于当量因子法的陕西省湿地生态系统服务价值时空演变及影响因素分析

Temporal and Spatial Evolution and Influencing Factors of Wetland Ecosystem Service Value in Shaanxi Province based on Equivalent Factor Method

陕西省湿地生态服务功能及价值的动态规律是生态脆弱区维持湿地生态系统良好状态的重要参照。基于当量因子估算法、回归分析法,分析2009—2019年陕西省10个市级行政单位的湿地生态系统服务价值(ESV)的时空演化规律、影响因素及机制。结论如下:陕西省湿地ESV先增后降且期末低于期初,调节服务对其贡献最大;陕西省湿地ESV始终保持关中>陕北>陕南,研究期内湿地ESV波动为陕南>陕北>关中;常住人口、耕地面积、粮食产量、三产业产值、年均相对湿度等是陕西省湿地ESV变化的显著影响因素,其在各区域的具体作用机理存在差异。

The dynamic law of wetland ecosystem service function and value in Shaanxi province is an important reference for maintaining wetland ecosystem in ecologically fragile areas.Regression analysis is applied while using the equivalent factor estimation method,the spatiotemporal evolution rule,influencing factors and mechanism of wetland ecosystem service value(ESV)of 10 municipal administrative units in Shaanxi Province from 2009 to 2019 were analyzed.The conclusions are as follows:(1)The wetland ESV of Shaanxi province first increased and then decreased,and the end of the period was lower than the beginning,the regulation services contribute the most to it.(2)The wetland ESV of Shaanxi province has always maintained Guanzhong>northern Shaanxi>southern Shaanxi,the fluctuation of wetland ESV was southern Shaanxi>northern Shaanxi>Guanzhong during the study period.(3)Resident population,cultivated land area,grain yield,output value of three industries,annual relative humidity and so on are the significant influencing factors of wetland ESV change in Shaanxi province,and there are differences in the specific mechanism of its action in different regions.