Effects of bamboo invasion on forest structures and diameter–height allometries  

作　　者：Ming Ouyang Anwar Eziz Shuli Xiao Wenjing Fang Qiong Cai Suhui Ma Jiangling Zhu Qingpei Yang Jinming Hu Zhiyao Tang Jingyun Fang 

机构地区：[1]School of Ecology and Environmental Science,and Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest,Yunnan University,Kunming,China [2]Institute of Ecology,College of Urban and Environmental Sciences,and Key Laboratory for Earth Surface Processes of the Ministry of Education,Peking University,Beijing,China [3]State Key Laboratory of Desert and Oasis Ecology,Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi,China [4]Jiangxi Provincial Key Laboratory for Bamboo Germplasm Resources and Utilization,and College of Forestry,Jiangxi Agricultural University,Nanchang,China

出　　处：《Forest Ecosystems》2025年第1期38-45,共8页森林生态系统(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.31988102);Yunnan Province Major Program for Basic Research Project(No.202101BC070002);Yunnan Province Science and Technology Talents and Platform Program(No.202305AA160014);Yunnan Province Key Research and Development Program of China(No.202303AC100009)。

摘　　要：Forest structure is fundamental in determining ecosystem function,yet the impact of bamboo invasion on these structural characteristics remains unclear.We investigated 219 invasion transects at 41 sites across the distribution areas of Moso bamboo(Phyllostachys edulis)in China to explore the effects of bamboo invasion on forest structural attributes and diameter–height allometries by comparing paired plots of bamboo,mixed bamboo-tree,and non-bamboo forests along the transects.We found that bamboo invasion decreased the mean and maximum diameter at breast height,maximum height,and total basal area,but increased the mean height,stem density,and scaling exponent for stands.Bamboo also had a higher scaling exponent than tree,particularly in mixed forests,suggesting a greater allocation of biomass to height growth.As invasion intensity increased,bamboo allometry became more plastic and decreased significantly,whereas tree allometry was indirectly promoted by increasing stem density.Additionally,a humid climate may favour the scaling exponents for both bamboo and tree,with only minor contributions from topsoil moisture and nitrogen content.The inherent superiority of diameter–height allometry allows bamboo to outcompete tree and contributes to its invasive success.Our findings provide a theoretical basis for understanding the causes and consequences of bamboo invasion.

关 键 词：Moso bamboo Forest structure Stand density DBHHeight allometry Scaling exponent Wetness index 

分 类 号：S718.5[农业科学—林学]