脊线对武夷山针阔混交林群落特征的影响

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中图分类号：S718.54 文献标志码：A 文章编号：0253-2395（2025）04-0839-10

Abstract：To investigate thecommunitycharacteristicsof mid-mountain needle-leavedand broad-leaved forests developed along ridgelines，avegetatiosurveywasconuctedinWuyishanNationalParkusing thetypicalquadratmethod.Bystatisticallanalyzingthespecispsitodceissitydossdestogeatietiodsfs sityalongtheridge line withareaandthebiomasschanges onbothslope aspects wereexamined torevealpartialfeaturesofthe ridgeineforestcommunityTheresultsindicatedthatthridgelinequadratscontainedatotalof67vascularplantspeciesfrom43 generaand24families，including2gymnospermspecies from2generaand2families，and64angiospermspecies from40genera and21families，totaling2889 individuals.The minimum surveyarea for the quadratswas 1 500m2 .Thedominant speciesinthe treelaer，subendrblreeododendonlatocauaiiddcaauselltuspeielyii icantdifferenceswereobservedinspeciesichessindicesbetweenthetwoslopeaspectsofteridgeline.Abovegroundbiomassexceeded belowgroundbiomassandthe biomassonthe southeastern slope was greater than thatonthenorthwesternslope.Themorphological characteristics of ridge lineplants generally included smaller individualdiameters at breastheight （average 5.55cm ），lower heights （average 6.79m ），and higher stand density（1.45 individuals/m2）compared to non-ridge line forest communities，forming asinglecanopylayer.Thesefeatures exhibiteduniquenes inspeciescompositionandstructure，contrastingsharplywithmid-mountaindwarf twisted forestsof similarspeciescomposition.Thispapersystematicallyrevealsforthefirsttimetheuniquestructural characteristicsofforestcommunitiesalong the WuyiMountainridgeline，filingtheresearchgapontheinfluencemechanismsof ridgeline topographic factors on mountain forest ecosystems.

Keywords：forestcommunity; ridge line;Wuyishan national park; species diversity; biomass

0 引言

生态环境是维持人类社会稳定发展的重要物质基础1，而森林生态系统是陆地上生物量最多、面积最大和生产力最高的生态系统[2]其中生物量是生态系统生产力的基础和功能的主要表现形式，是研究生态系统碳循环与植物资源分配策略的核心内容[3-5]，其作为森林植物多样性的重要组成部分，在森林水土保持、养分循环、林地生产力维持等方面发挥关键作用[6-7]，是反映生态系统稳定性及群落演替规律的重要指标[8]。（剩余17671字）