德清县自然生态系统质量量化评估方法探究

The study on quantitative evaluation method of ecological quality in Deqing county

针对县域自然生态系统质量量化评估方法的选择和优化问题,该文以德清县为例,选择物种多样性、生态承载力和生态系统服务价值量化评估模型和方法对其2010年和2018年的自然生态系统质量进行评估分析。结果显示,德清县林地物种多样性的Shannon-Wiener指数和Simpson指数均优于草地。2010—2018年的生态承载力和生态系统服务价值呈上升趋势,生态系统服务价值能够有效评估地区自然资源的资本价值。生态系统服务价值结合物种多样性具有较高的实践价值。进一步拓展了地理国情和国土数据的实践应用,研究结果可用于县域土地利用规划、自然资产统计和自然保护地监测和评估等。

Aiming at selection and optimizing the method on quantification of the natural ecosystem quality,the species diversity,biocapacity and ecosystem service value model was used to calculate the indexes of Deqing County,Zhejiang Province in 2010 and 2018.Results indicated that the Shannon--Wiener index and Simpson index of forest rendered better quality than those of grassland.Besides,invasive species were more frequently observed in grassland.The biocapacity of Deqing County and the value of ecosystem services had increased during the period from 2010 to 2018.Ecosystem services value was a valid index for evaluating capital value of regional natural resources.Combination of biodiversity survey and ecosystem services value evaluation served for a valid tool for monitoring and evaluating natural ecosystem quantitatively.The present study demonstrated that in the monitoring and quantitative assessment of natural ecosystems,the combination of species diversity and ecosystem service value was more comprehensive.In addition,the research results could serve for land use planning,natural assets survey,nature reserve monitoring and evaluation.