中南林业科技大学学报2026，Vol.46Issue(2)：23-30,8.DOI:10.14067/j.cnki.1673-923x.2026.02.003
鄂西南常绿落叶阔叶混交林超级优势种和大树对生物量和生产力的主导作用
Dominant role of hyperdominance and large-sized trees in standing biomass and productivity of evergreen and deciduous broadleaf mixed forests in southwestern Hubei
摘要
Abstract
[Objective]This study systematically investigated the compositional characteristics of hyperdominance and large-sized trees,as well as their key roles in maintaining forest biomass and productivity,within the natural forest ecosystems of southwestern Hubei.The aim is to provide a theoretical basis and practical guidance for the conservation and sustainable management of forest vegetation in subtropical mountainous and hilly regions.[Method]We used biophysical tree data from 6-hectare large plot in southwestern Hubei,China.We systematically analyzed the relative contributions of hyperdominance and large-sized trees to biomass and productivity,exploring the potential impact of these dominant tree species on regional forest carbon cycling and their key roles in maintaining forest ecosystem functions and stability.[Result]A small number of hyperdominance contributed approximately 50%of species abundance(8 species),biomass(2 species)and productivity(5 species).The ranking of species abundance does not align with their biomass and productivity rankings,with notable differences observed.Species abundance showed a significant positive correlation with both biomass and productivity(R2＞0.62,P＜0.001),with higher species abundance contributing more to biomass and productivity.Approximately 1.00%to 3.39%of the big-sized trees contributed 34.29%to 68.94%of the biomass and 19.99%to 50.05%of the productivity.Species abundances of large trees were excellent predictors of their biomass(R2＞0.98,P＜0.001)and productivity(R2＞0.86,P＜0.001).Phylogenetic trees showed that hyperdominance and large-sized trees exhibited evolutionary clustering,primarily concentrated within specific families.These species played a key role in maintaining ecosystem functions.[Conclusion]Hyperdominance and big-sized trees play a crucial role in sustaining forest biomass and productivity.These dominant trees not only potentially affect regional forest carbon cycling but also have far-reaching implications for the long-term health and stability of forest ecosystems.关键词
多度/生物量/森林监测样地/超级优势种/大树/生产力Key words
abundance/biomass/forest dynamic plot/hyperdominance/big-sized trees/productivity分类
农业科技引用本文复制引用
黄晶晶,吴安驰,艾训儒,姚兰,朱江,郭秋菊,张科燕,兰洁,朱强..鄂西南常绿落叶阔叶混交林超级优势种和大树对生物量和生产力的主导作用[J].中南林业科技大学学报,2026,46(2):23-30,8.基金项目
国家重点研发计划项目(2023YFE0112800) （2023YFE0112800）
湖北省生物资源保护与利用重点实验室开放基金项目(KYPT012312) （KYPT012312）
湖北省教育厅科学技术研究项目(Q20241905). （Q20241905）
