Aboveground biomass stocks of species-rich natural forests in southern China are influenced by stand structural attributes,species richness and precipitation  

作　　者：Wen-Hao Zeng Shi-Dan Zhu Ying-Hua Luo Wei Shi Yong-Qiang Wang Kun-Fang Cao 

机构地区：[1]State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources,College of Forestry,Guangxi University,Nanning 530004,China [2]Guangxi Key Laboratory of Forest Ecology and Conservation,College of Forestry,Guangxi University,Nanning 530004,China [3]Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China,School of Life Sciences,Guizhou Normal University,Huaxi College Town,Gui'an District,Guiyang 550025,China

出　　处：《Plant Diversity》2024年第4期530-536,共7页植物多样性（英文版）

基　　金：supported by the Guangxi Key R&D Program (project No. AB16380254);a research project of Guangxi Forestry Department (Guilinkezi [2015] No.5);supported a grant for Bagui Senior Fellow (C33600992001)。

摘　　要：Forests,the largest terrestrial carbon sinks,play an important role in carbon sequestration and climate change mitigation.Although forest attributes and environmental factors have been shown to impact aboveground biomass,their influence on biomass stocks in species-rich forests in southern China,a biodiversity hotspot,has rarely been investigated.In this study,we characterized the effects of environmental factors,forest structure,and species diversity on aboveground biomass stocks of 30 plots(1 ha each) in natural forests located within seven nature reserves distributed across subtropical and marginal tropical zones in Guangxi,China.Our results indicate that forest aboveground biomass stocks in this region are lower than those in mature tropical and subtropical forests in other regions.Furthermore,we found that aboveground biomass was positively correlated with stand age,mean annual precipitation,elevation,structural attributes and species richness,although not with species evenness.When we compared stands with the same basal area,we found that aboveground biomass stock was higher in communities with a higher coefficient of variation of diameter at breast height.These findings highlight the importance of maintaining forest structural diversity and species richness to promote aboveground biomass accumulation and reveal the potential impacts of precipitation changes resulting from climate warming on the ecosystem services of subtropical and northern tropical forests in China.Notably,many natural forests in southern China are not fully stocked.Therefore,their continued growth will increase their carbon storage over time.

关 键 词：Subtropical forest Marginal tropical forest Aboveground biomass Species diversity Forest structural attribute Environment factor 

分 类 号：S718.5[农业科学—林学]