北京林业大学学报2025，Vol.47Issue(9)：14-23,10.DOI:10.12171/j.1000-1522.20250096
小陇山林区不同类型锐齿槲栎次生林乔木层多样性与碳储量研究
Arboreal layer diversity and carbon storage in secondary forests of Quercus aliena var.acuteserrata across different types in Xiaolongshan Mountain forest area,Gansu Province of northwestern China
摘要
Abstract
[Objective]To investigate the species diversity,structural diversity,carbon stocks,and allocation patterns in the arboreal layer of Quercus aliena var.acuteserrata-dominated secondary forests across different types in Xiaolongshan Mountain forest region,Gansu Province of northwestern China,and to provide a scientific foundation for forest management practices and precision-based enhancement of carbon sequestration capacity in this region.[Method]Based on stand basal area composition,the typical Quercus aliena var.acuteserrata secondary forests in the study area were classified into three types(oak-broadleaved mixed forest,oak forest,pine-oak mixed forest).The species diversity,structural diversity,carbon storage,and carbon allocation among different organs in the arborous layer of these secondary forest types were systematically calculated,with comparative analysis conducted using Kruskal-Wallis tests.Structural equation modeling(SEM)was subsequently employed to elucidate the relationship between species diversity,structural diversity,and carbon stocks.[Result](1)There were significant differences in the tree layer diversity of different types of Quercus aliena var.acuteserrata secondary forests.The tree species diversity of oak-broadleaved mixed forest was significantly higher than oak forest and the pine-oak mixed forest,and its average structural diversity was 4.133±0.595,which was also significantly higher than oak forest(3.469±0.537)and pine-oak mixed forest(3.201±0.199).(2)There were significant differences in carbon storage accumulation and allocation among tree layers of three types of secondary forests of Q.aliena var.acuteserrata.The overall average carbon storage of oak forest was the highest((94.528±2.523)t/ha),followed by oak broadleaved mixed forest((88.855±16.297)t/ha),and the lowest((82.094±7.527)t/ha)in pine oak mixed forest.The allocation of carbon storage organs in the three types of secondary forests also showed a significant dominance of stem branch-root carbon storage,with a total proportion of stem and branch carbon storage ranging from 67.9%to 79.1%,and root storage ranging from 12.6%to 19.4%,totaling over 90%.(3)The structural equation modeling results showed that structural diversity had a significant positive impact on carbon storage(0.484,P<0.001),and tree species diversity also had a positive impact on carbon storage,but it was not significant.[Conclusion]Significant differences in species diversity,structural diversity,and carbon stocks are identified among the three Quercus aliena var.acuteserrata secondary forest types.The oak-broadleaved mixed forest consistently exhibites higher species diversity,structural diversity,and carbon stocks compared with the oak forest and pine-oak mixed forest.Structural diversity contributes more substantially to carbon stocks than species diversity,highlighting that enhancing forest ecosystem structural complexity may represent a more effective strategy for augmenting carbon sequestration potential.关键词
锐齿槲栎/次生林/乔木层/树种多样性/结构多样性/碳储量/结构方程模型Key words
Quercus aliena var.acuteserrata/secondary forests/arborous layer/tree species diversity/structural diversity/carbon stocks/structural equation model(SEM)分类
农业科技引用本文复制引用
萨日娜,杜月伟,金海炎,胡艳波,张弓乔,刘文桢,赵中华..小陇山林区不同类型锐齿槲栎次生林乔木层多样性与碳储量研究[J].北京林业大学学报,2025,47(9):14-23,10.基金项目
国家重点研发计划(2022YFD2200503),国家自然科学基金面上项目(32171780). （2022YFD2200503）
