湖南小溪保护区珙桐群落优势种生态位·种间关系及群落稳定性

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关键词珙桐；生态位；种间联结性；种间相关性；群落稳定性

中图分类号Q948.15文献标识码A

文章编号 0517-6611（2026）03-0121-09

doi：10.3969/j. issn.0517-6611. 2026. 03. 022

开放科学（资源服务）标识码（OSID）：

Niche，InterspecificRelationships，andCommunity Stabilityof Dominant Species intheDavidiainvolucrata Communityof Xiaoxi National Nature Reserve， Hunan Province

SULin-qi，ZHOUQing，TIANYong-xiang（1.Colegeof Resources，Hunan AgriculturalUniversty，Changsha，Hunan410128; 2.Administration Bureau of Xiaoxi National Nature Reserve，Xiangxi，Hunan 416000）

AbstractTlorescesctespifelatioisdmmityabilitaracteritisoftdiucat nityiXiaoxiatioalatueReserve，HunanProvince.asedadatsureydtaethodsicludingncealysis，veratio analysis（vrace）pen’eaotst，eaoeatdonitailse employedtostudythedominantspeciesoftheDidiaimolucratacommunityResultsshowthat：Davidiaimolucratahasthelargestniche breadthadagporatveinllfstlayesofredomuityutgeeratioofingissuntDdi volucrataverlapswithdmnantspeciesinachforestlayerwithamoderatelyighdgree（O.fortrs，.forshrubs）Tetrlar showsaonsitgaieiespeiicoitloeos，ileshbleotosiie with close connections.In Spearman and Pearson correlation tests，the significance rates of the tree layer are both 8.8% ，and those of the shrub layer are 9.04% and 7.62% ，respectively. Results are linearly correlated with niche overlap values. In the tree layer， Davidia involucrataissignifntlsiieloeadiosorodCmei；ib，idsit showssignificagtieoeliitEuclidistacsoftetre（ub）lae19eoido be in the mid-succession stage with an unstable structure.

Key wordsDavidia involucrata ;Niche;Interspecific association; Interspecific correlation;Community stability

生态位宽度和生态位重叠是反映物种资源利用状况，在群落或生态系统中的功能位置以及群落稳定性的重要指标[1]，是群落生态学领域的研究热点问题。（剩余12618字）