State Key Laboratory for Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Beijing, China; University of Chinese Academy of Sciences, China.
State Key Laboratory for Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Beijing, China.
Environ Pollut. 2018 Jul;238:222-229. doi: 10.1016/j.envpol.2018.03.013. Epub 2018 Mar 20.
Soils provide the service of attenuating and detoxifying pollutants. Such ability, natural attenuation capacity (NAC), is one of the most important ecosystem services for urban soils. We improved the ecosystem-service performance index (EPX) model by integrating with entropy weight determination method to evaluate the NAC of residential soils in Beijing. Eleven parameters related to the soil process of pollutants fate and transport were selected and 115 residential soil samples were collected. The results showed that bulk density, microbial functional diversity and soil organic matter had high weights in the NAC evaluation. Urban socio-economic indicators of residential communities such as construction age, population density and property & management fee could be employed in kinetic fittings of NAC. It could be concluded urbanization had significant impacts on NAC in residential soils. The improved method revealed reasonable and practical results, and it could be served as a potential measure for application to other quantitative assessment.
土壤具有减缓和解毒污染物的功能。这种能力，即自然衰减能力（NAC），是城市土壤最重要的生态系统服务之一。我们通过整合熵权确定方法改进了生态系统服务绩效指数（EPX）模型，以评估北京住宅土壤的 NAC。选择了与污染物命运和运输的土壤过程相关的 11 个参数，并采集了 115 个住宅土壤样本。结果表明，土壤容重、微生物功能多样性和土壤有机质在 NAC 评价中具有较高的权重。住宅社区的城市社会经济指标，如建筑年代、人口密度和物业及管理费，可以用于 NAC 的动力学拟合。可以得出结论，城市化对住宅土壤的 NAC 有显著影响。改进后的方法显示出合理实用的结果，可作为其他定量评估的潜在措施。
