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

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中图分类号： S718.55+6Φ 文献标志码：A 文章编号：1673-923X（2026）02-0023-08

Abstract：【Obectie】Tisstdysystematicallivestigatedteompositionalhracteristsofhperdominanceadgdt aswellatheiryolesimaitiinforestbomasndproductivityitintaturalfortostesofouthesteHube Theaiistoprovideateoreticalbasisandpracticalguidanceforteconservatioandsustainablemanagementofforestvegetatioin subtropicalmountainousandhillregions.【Method】Weusedbiophysicaltreedatafrom6-hectarelargeplotinsouthwesternHubei China.Wesystematicallyanalyzedtherelativecontributionsofhyperdominanceandlarge-sizedtrestobiomassandproductivity exploringthepotentialimpactofthesedominantreespeciesonregionalforestcarboncyclingandtheirkeyolesinmaintainingforest ecosystem functionsand stability.【Result】Asmall numberof hyperdominance contributed approximately 50% ofspecies abundance （8species）omass 2spcies）andproductivity（5speies）.eakingofeciesabndanedsnotaligwitheirosd productivityanings，withotablediferencesobseedSpecesabundancesowedasignificantpositivecoelationwithbothoass and productivity （ R2>0.62 P<0.001 ）， with higher species abundance contributing more to biomassand 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 treeswere excellent predictors of their biomass R2>0.98 P<0.001 ）andproductivity （R2>0.86 P<0.001 ） Phylogenetictresshowedthathyperdominanceandlarge-sizedtres exhibitedevolutioaryclustering，primarilyoncentratedwithin specificfamilies.Thesespeciesplayedakeyroleinmaintainingecosystemfunctions.【Conclusion】Hyperdominanceandbig-sized treesplayacucialoleinsustaingforestbiomassdproductivityesedomantresnotonlypotentiallffctegioalfoest carboncycling butalsohavefar-reaching implications forthe long-term healthand stabilityofforest ecosystems.

Keywords：abundance;biomass;forestdynamic plot;hyperdominance;big-sized trees;productivity

森林生态系统是陆地生态系统的主体，具有调节气候、涵养水源、碳固存、生物多样性保育等多种不可替代的服务功能[1-2]。（剩余13016字）