西南林业大学学报2026，Vol.46Issue(3)：91-99,9.DOI:10.11929/j.swfu.202502039
哀牢山中山湿性常绿阔叶林地上生物量与影响因素研究
Aboveground Biomassand Their Influencing Factors in the Mid-mountain Moist Evergreen Broad-leaved Forest of the Ailao Mountains
摘要
Abstract
A study site was selected within a mid-mountain moist evergreen broad-leaved forest plot located in the core area of the Ailao Mountains National Nature Reserve in Yunnan Province,30 permanent 20 m × 20 m forest plots were established.The study used allometric growth equations to estimate the aboveground biomass(AGB)of woody plants,and applied partial least squares(PLS)regression to assess the relative influence of envir-onmental factors,functional diversity,and phylogenetic diversity on the AGB of the overstorey and understory tree layers.The results showed that the AGB of the overstorey and understorey tree layers was 346.28±137.35 t/hm2 and 12.35±8.73 t/hm2,respectively,with the PLS models explaining 40.7％and 63.1％of their variation.Compared with functional traits and phylogenetic diversity,environmental factors played a more significant role in shaping overstorey AGB,and the strong correlation between overstorey AGB and community-weighted mean trait values supported the"Mass Ratio Hypothesis".Understorey AGB exhibited a stronger correlation with com-munity-weighted traits and Functional Richness(FRic)than with environmental factors,supporting both the"Mass Ratio Hypothesis"and the"Niche Complementarity Hypothesis".Overstorey AGB was positively correl-ated with the phylogenetic diversity indices Faith's PD and Mean Pairwise Distance(MPD),while understorey AGB was positively correlated with Faith's PD but negatively correlated with the Mean Nearest Taxon Distance(MNTD),indicating that phylogenetic diversity exerts distinct influences on AGB accumulation between the over-storey and understorey layers.The study elucidated the primary factors affecting the AGB of both the overstorey and understorey tree strata within the mid-mountain moist evergreen broad-leaved forests of the Ailao Mountains,thereby offering insights for research into the sustaining mechanisms of biomass carbon pools in subtropical forest ecosystems.关键词
常绿阔叶林/乔木层/下木层/地上生物量/多样性/质量比假说/生态位互补假说Key words
broad-leaved evergreen forest/overstorey layer/understorey layer/aboveground biomass/di-versity/mass ratio hypothesis/niche complementarity hypothesis分类
农业科技引用本文复制引用
李钟锦,鲁志云,程希平,王逸之,李晓娜,徐远杰..哀牢山中山湿性常绿阔叶林地上生物量与影响因素研究[J].西南林业大学学报,2026,46(3):91-99,9.基金项目
云南省兴滇人才项目(YNWR-QNBJ-2019-244)资助 （YNWR-QNBJ-2019-244）
国家自然科学基金项目(32460295)资助. （32460295）
