城市公园绿地植物群落特征与碳汇效益OA

Taking the parks along the Liangjiang Greenway in Chongqing as research objects,their carbon sequestration benefits were systematically evaluated and the regulatory mechanisms of community structures were revealed,based on measured data from 36 typical plant community plots and 49 landscaping species.The results show that:at the species scale,17 high carbon sequestration plants were identified,with the carbon sequestration capacity showing a significant differentiation pattern of trees>shrubs>herbs;at the community scale,cluster analysis revealed that communities with thick trunks,tall stature,and high canopy closure(cluster Ⅰ,cluster Ⅱ)exhibit the optimal carbon sequestration benefits,standing out among 16 high-efficiency communities;regarding the structural regulation,vertical layering should increase the proportion of high carbon sequestration trees while synergistically incorporating high carbon sequestration shrubs and herbs,whereas horizontal pattern follows a gradient efficiency rule of dense forests>moderately dense forests>sparse forests.Accordingly,optimization strategies for high carbon sequestration plant configuration in urban green spaces were proposed from three dimensions:species selection,community construction,and spatial arrangement,providing a theoretical basis and practical pathway for enhancing the carbon sequestration resilience of urban ecosystems and supporting the goal of carbon neutrality.