Valuation of Street Tree Ecosystem Services Based on i-Tree Model
As the skeleton of street greening framework,street trees support the operation of urban ecosystem services.Taking the middle section of Linjiang Avenue in Wuhan as an example,the paper constructs a comprehensive evaluation model for street tree ecosystem services based on i-Tree,and analyzes the ecosystem service value of both 27 common street trees and streets in the study area using monetary value as a unified measurement standard,aiming to provide a reference for the selection and optimization of street tree species and for the improvement of street landscape and ecological environment.The results show that:1)In the plant-landscape configuration of streets,the ecosystem service values are ranked as aesthetic value＞energy saving value＞rainwater interception value＞air purification value＞ecological carbon sequestration value;2)The annual ecosystem services of street trees in the study area are valued at about 1.32 million RMB,the ecosystem services of street trees per kilometer annually create a value at 290 000 RMB,and the average annual ecosystem service value of one individual street tree is 305.4 RMB;and 3)Street trees have considerable ecosystem service value,but there are also obvious interspecific differences,among which energy saving value,aesthetic value and rainwater interception value are higher with the tree species for calculation,and the value of air purification and ecological carbon sequestration is lower.Therefore,it is suggested that energy saving,aesthetic value and rainwater interception value should be taken as the primary factors for reference in the process of street tree configuration,and the selection and application of tree species should be comprehensively considered in combination with street attributes,so as to construct a comprehensive ecosystem service structure of urban street tree and improve the comprehensive ecosystem service value of street trees.
street treei-Tree modelvaluation of ecosystem servicesinterspecific contrastWuhan City
NETL
NSTL
万方数据
