基于单木的城市绿地乔木碳汇计量及其空间分布特征——以平湖市为例  

Measurement and spatial distribution characteristics of the carbon sink of urban garden trees based on single trees:a case study of Pinghu City

作　　者：曾鹿敏 赵毅辉 李同欣 高逸平 党秋伟 王懿祥[1,2,3] ZENG Lumin;ZHAO Yihui;LI Tongxin;GAO Yiping;DANG Qiuwei;WANG Yixiang(College of Carbon Neutrality,College of Environment and Resources,Zhejiang Agriculture and Forestry University,Hangzhou 311300,China;State Key Laboratory of Subtropical Silviculture,Zhejiang Agriculture and Forestry University,Hangzhou 311300,China;Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration of Zhejiang Province,Zhejiang Agriculture and Forestry University,Hangzhou 311300,China;College of Forestry and Biotechnology,Zhejiang Agriculture and Forestry University,Hangzhou 311300,China;Pinghu Housing and Urban Rural Development Bureau,Jiaxing 314050,China;Zhejiang Geographic Information Technology Software Technology Limited Company,Hangzhou 311300,China)

机构地区：[1]浙江农林大学环境与资源学院､碳中和学院,杭州311300 [2]浙江农林大学省部共建亚热带森林培育国家重点实验室,杭州311300 [3]浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室,杭州311300 [4]浙江农林大学林业与生物技术学院,杭州311300 [5]平湖市住房和城乡建设局,嘉兴314050 [6]浙江地信软件科技有限公司,杭州311300

出　　处：《生态学报》2024年第20期9209-9220,共12页Acta Ecologica Sinica

基　　金：金平湖数字创新应用实验室课题(H20230111);国家自然科学基金(31400607);浙江省自然科学基金(LY19C160007)。

摘　　要：精准计量城市绿地乔木碳汇量是提高绿地碳汇能力的前提。以平湖为例,采用单木调查结合绿地类型方法计量城区乔木碳汇,聚类分析树种碳汇能力,空间自相关与热力图分析碳密度、碳汇速率空间分布特征,以辅助城市绿地合理布局。结果表明:(1)平湖的附属绿地碳密度与碳汇速率最大,城市乔木绿地平均乔木碳密度(22.72 t C/hm^(2))为中上水平,平均乔木碳汇速率(8.99 t CO_(2)e a^(-1)hm^(-2))高于非城市森林;(2)硬阔Ⅱ((31.13±15.11)kg CO_(2)e/a)与硬阔Ⅰ((30.43±17.56)kg CO_(2)e/a)树种碳汇能力强于松类、软阔、杉类、柏类;(3)城市乔木绿地乔木碳密度和碳汇密度具有空间聚集性,高值常沿道路呈条带状或沿水域呈团块状分布。研究方法和结论对于厘清城市绿地乔木的碳家底,管理和提升城市自然碳汇功能,促进城市碳中和具有重要的理论和实践意义。Accurately measuring the carbon sink of urban green trees is a prerequisite for improving the carbon sink capacity of green spaces.This article takes Pinghu City as an example,using a single tree survey combined with the green space type method to measure the carbon sink of urban trees,clustering analysis of the carbon sink capacity of tree species,and spatial autocorrelation and heat map analysis of carbon density and carbon sink rate spatial distribution characteristics to assist in the rational layout of urban green spaces.The results showed that:(1)The carbon density and carbon sink rate of subsidiary green spaces were the highest in Pinghu,and the average tree carbon density of urban tree green spaces(22.72 t C/hm^(2))was at the upper middle level.The average tree carbon sink rate(8.99 t CO_(2)e a^(-1)hm^(-2))was higher than that of non-urban forests.(2)The carbon sequestration capacity of HardwoodⅡ((31.13±15.11)kg CO_(2)e/a)and HardwoodⅠ((30.43±17.56)kg CO_(2)e/a)was stronger than that of Pinus,Softwood,Cunninghamia,and Cupressus.(3)The carbon density and carbon sink density of trees in urban green spaces exhibited spatial clustering,with high values often distributed in strips along roads or in clusters along water bodies.The methods and conclusions of this study have important theoretical and practical significance for clarifying the carbon background of urban green space trees,managing and enhancing the natural carbon sink function of cities,and promoting urban carbon neutrality.

关 键 词：城市绿地乔木 单木尺度 碳储量 碳汇 绿地类型 空间分布 

分 类 号：X173[环境科学与工程—环境科学]