Estimation and Distribution Characteristics of Carbon Density in the Arbor Layer of Urban Green Spaces in Shenzhen's Built Area
In order to reveal the spatial distribution characteristics of and influencing factors to carbon density in the arbor layer of urban green spaces in Shenzhen's built areas,this study estimates and analyzes the carbon density of the urban green spaces of different types and the forests of different age in different administrative districts of Shenzhen based on the tree anisotropic growth model.The results show that:1)The average carbon density of the arbor layer in Shenzhen's urban green spaces is 4.494±0.345 kg·m-2,and there are large differences in the carbon density of different age groups of arbor forest,with mature forests having the highest carbon density,followed by near-mature forests and middle-aged forests,and young forests having the lowest;2)The carbon density of the arbor layer varies greatly among different types of green spaces,with the highest average carbon density in parks(5.436±0.498 kg·m-2),followed by ancillary green spaces(2.866±0.323 kg·m-2),and the lowest in plaza green spaces(2.230±0.405 kg·m-2);3)There are also large differences in the carbon density of the green space's arbor layer in different administrative districts,and the average carbon density of the arbor layer in the urban green spaces in Futian,Bao'an,and Luohu districts are higher,while that in Guangming,Longgang,and Longhua districts is relatively lower;and 4)The average diameter at breast height(DBH),average tree height(ATH),stand density(SD),degree of depression(DD)and average crown width(ACS)have a significant effect on the carbon density of the arbor layer in the urban green space(P<0.01)whereas timber volume density(TPD)has the lower effect on the carbon density of the arbor layer.Therefore,moderately increasing the planting density of trees and the number of large-canopy trees in green spaces with low carbon density will effectively enhance the carbon sequestration capacity of urban green spaces in Shenzhen.
urban green spacecarbon density in arbor layerbiomass modelingShenzhen
万方数据
维普
