揭示太原市生态公益林碳储量的时空格局演变规律与动态变化趋势,评估其碳汇潜力,可为提升区域森林可持续经营及碳汇功能提供科学依据。基于2018年、2023年太原市2期森林资源清查数据,采用立木生物量模型估算2个时期的生态公益林林分碳储量,分析不同树种、林分起源及龄组的碳储量、碳密度及碳汇特征,并运用Logistic经验模型拟合碳储量动态变化过程,评估其碳汇潜力。结果表明:1)2018—2023年,生态公益林总碳储量从2.24 Tg增加至3.14 Tg,其中中龄林的碳储量最大;油松和栎类的碳储量最高。2)从林分起源来看,天然林的碳密度高于人工林;公益林中,云杉、华北落叶松和桦木的碳密度最大。3)预计到2060年,太原市生态公益林总碳储量可达到7.21 Tg,比2023年增加4.07 Tg,中幼龄林碳储量占比较高,具有较大的碳汇潜力。太原市生态公益林碳储量总体呈增长趋势,通过调整龄组结构,有助于改善森林质量,进一步提高碳储量与整体碳汇能力。保育现有森林资源、提升森林质量,是固碳增汇的重要途径。

This study aim to reveal the spatiotemporal dynamics and trends of carbon storage in in Taiyuan City’s ecological public forests and to assess their carbon sink potential.The findings provide scientific basis for the sustainable regional forests management and the enhancement of carbon sink functions.The ecological public forest inventory resource data of Taiyuan City in 2018 and 2023 were used to estimate carbon storage using a stand biomass model.The carbon storage,carbon density and carbon sink characteristics of different tree species,forest origins and age groups were analyzed.Furthermore,a Logistic empirical model was employed to simulate the dynamics of carbon storage and predict its future sink potential.The results showed:1) From 2018 to 2023,the total carbon storage of ecological public forest stands increased from 2.24 Tg to 3.14 Tg.Middle-aged forests contributed the most to carbon storage,with Pinus tabulaeformis and Quercus spp.having the highest values.2) The carbon density of natural forests is higher than that of planted forests.Among all species,Picea asperata,Larix principis-rupprechtii,and Betula L.exhibited the highest carbon densities.3) Projection indicate that the total carbon storage of ecological public forest stands in Taiyuan City will reach 7.21 Tg by 2060,4.07 Tg increase from 2023.The high proportion of young and middle-aged forestssuggests significant future carbon sink potential.Theoverallcarbon storage of ecological public forests in Taiyuan City shows an increasing trend.By adjusting and optimizing the age structure of forests,it is helpful to improve forest quality and further increase carbon storage and overall carbon sink capacity.Protecting and enhancing existing forest resources and improving forest quality are a key strategy for promoting carbon sequestration.