上海城市森林群落结构对固碳能力的影响  

Effects of community structure on carbon fixation of urban forests in Shanghai,China

作　　者：徐飞[1] 刘为华 任文玲[1] 仲启铖[1] 张桂莲[3] 王开运[1] 

机构地区：[1]华东师范大学资源与环境科学学院上海市城市化生态过程与生态恢复重点实验室,上海200062 [2]深圳市滨河中学,广东深圳518010 [3]中国科学院上海生命科学研究院计算生物学研究所,上海200031

出　　处：《生态学杂志》2010年第3期439-447,共9页Chinese Journal of Ecology

基　　金：国家自然科学基金重点项目(90511008);国家"十一五"科技支撑计划重大项目(2006BAC01A14);国家自然科学基金项目(36070315);上海市优秀学科带头人计划(A类)资助项目(06XD14008)

摘　　要：基于上海市区航片数字化、代表性样地群落调查、优势树种生理参数测定和CITYgreen模型软件,对上海城市森林固碳能力进行评估,并探讨群落结构对固碳能力的影响。结果表明:上海城市森林总碳贮量为478472t,年碳固定量为6256t.a-1,平均碳密度为47.80t.hm-2,平均固碳率为0.625t.hm-2.a-1;城市森林的固碳率与郁闭度及群落密度均呈极显著正相关,而与平均胸径负相关;碳密度与郁闭度及平均胸径均呈极显著正相关,而与群落密度无显著相关;低密度高胸径群落比中、高密度群落具有更高的碳密度;混交林碳密度高于纯林,复层林碳密度和固碳率都高于单层林,且固碳能力的差异在一定程度上受平均胸径、群落密度等因子影响。Based on the RS image digitization,investigations on representative communities,measurement of dominant species physiological variables,and CITYgreen model,this paper evaluated the carbon fixation of urban forests in Shanghai,and studied the effects of community structure on the carbon fixation of the forests.The total carbon storage and the annual carbon sequestration of urban forests in Shanghai were 478472 t and 6256 t,and the average carbon density and average carbon sequestration rate were 47.80 t·hm^-2 and 0.625 t·hm^-2·a^-1,respectively.The carbon sequestration rate was significantly positively correlated with canopy closure and community density but negatively correlated with average DBH,and the carbon density was significantly positively correlated with canopy closure and average DBH but had no significant correlation with community density.The forests with low density and high DBH had higher carbon density than those with medium or high density.Mixed forests had higher carbon density than pure forests,multilayer forests had higher carbon density and carbon sequestration rate than monolayer forest,and the differences were to some extent affected by average DBH and community density.

关 键 词：城市森林 群落结构 碳密度 固碳率 CITYgreen模型 

分 类 号：S718.5[农业科学—林学]