藏东北高寒草甸系统发育及物种多样性特征

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关键词高寒草甸；系统发育多样性；物种多样性；丰富度；生物量

中图分类号X176文献标识码A

文章编号 0517-6611（2025）17-0055-03

doi：10.3969/j.issn. 0517-6611. 2025. 17. 014

开放科学（资源服务）标识码（OSID）：

PhylogeneticDevelopmentandSpecies DiversityCharacteristicsofAlpineMeadowsintheNortheastern Qinghai-XizangPlateau MAOFu-ren1，DUYan-gong（1.NanjingYuhouDisoftEnvironmentalTechnologyCo.，Ltd.QinghaiBranch，Xining，Qingha ;2. Northwest Institute of Plateau Biology，Chinese Academy of Sciences，Xining，Qinghai ）

AbstractObectie]TostudypogenetidevelopmentandspecisdiversityharacteriticsofalpinemadosinthenoteasteQigiXizangPlateau.MetodInthistudyeieigatedcangesiseciss，vesityndbovegoudioassofledow from2021to23usingaquadrat-basedapproach.Result]Theresultsshowedthatspeciesrichnessvuesin221022，23wre24， 26，and30，respectively，whiletheShanon-Wenerindiceswere2.63，2.4，and2.63，andphylogeneticdiversityvalueswere7.69， 8.69，and9.48.Despiteslightiteranualvarations，osignficantdifereneswerebservedTheaverageabovegroundbiossas 426.44g/m2 ，with the highest value recorded in 2021 （ 482.19g/m2 ， P>0.05 ）.Mixed-effect model analysis revealed that species richness hdasignifitositietonoveodomass，easylogeticdvesitedsigantgatieoelatioS non-Wienerindex showed no significantimpact.Strongspatialheterogeneitywas detectedamong plots，andthe modelexplained 53.8% of the total variation，with fixed effects accounting for 23.1% . [Conclusion] Increasing species richness can enhance aboveground biomass，while higher phylogenetic diversity may intensify interspecific competition，thereby constraining biomass accumulation.

KeyWordsAlpine meadow;Phylogenetic diversity;Species diversity;Richness;Biomass

生物多样性维持生态系统功能与服务，生物多样性较高的草地生态系统能够充分利用生态环境资源，提升生态系统的多功能性[1]。（剩余7963字）