增殖放流水域鱼类群落及β多样性时空变化

——以雅鲁藏布江藏木段为例

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关键词：增殖放流；β多样性；鱼类群落结构；雅鲁藏布江中图分类号：Q958 文献标识码：A文章编号：0439-8114（2025）07-0128-05DOI：10.14088/j.cnki.issn0439-8114.2025.07.022

The temporal and spatial variations of fish communities and β -diversity instock enhancement waters ：A case study of the Zangmu reaches of the Yarlung Zangbo River

QUE Pei-zhong1，DU Chun-zhong²，DINGYao³，LU Qing-xian²，GU Zheng-xuan³，WANG Shi- ⋅jun2 LUXing-yu³，ZHANGHuan³，WULei4

（1.ZangmuHydropoerantofHuangetYarungZngbiverHdropoervelopentCo，d.aa56et，;Ju HydropowerBrachofHanngibetungZngbiverHydrooevelopntCodaan6ibetinaicabe BiotechnologyCo.td.hengduoo，China;4CollgeofFsheries，HuazhonAgriculturalUniversity，Wuhan430ina）

Abstract：Tounderstandthechangesinfishcommunitystructureinstockenhancementwaters，continuoussurveydataofishesources from the Zangmu reaches of the Yarlung Zangbo River from 2017 to 2022 were used.By decomposing β -diversity，this study analyzedthechanges infshcomunitystructureandthe mehanismsofsuccessionandstability.Theresultsshowedthat3Ofishspecies weresurveyedintheZangmureachesoftheYarlung ZangboRiver.From2017to22，thedominantfishspecies wereallnativespecies，whereas from 2O21 to 2022，the dominant species included non-native species.Both βsor （total β -diversity）and βsne （nestedness component） showed significant differences between different years （ P<0.05 ），indicating that changes in fish species composition across years were mainly due to changes in the nestedness component. βsim （turnover component）showed significant spatial differences （ P <0.05），specificallinspecies turnoverofnon-nativefish.Testock enhancementhadpositiveimplicationsfortheconservationof native fish. Overall， βsim was significantly greater than βsne（P<0.05） ，indicating that species composition changes in the Zangmu reachesoftheYarlung ZangboRiverweremainlydrivenbyturnover，highlighting theconservationofeachriverreach.Thisstudyprovided a scientific reference for stock enhancement efforts in water conservancy projects by analyzing β -diversity and its components from the perspective of changes in fish composition.

Keywords：stock enhancement; β -diversity；fish community structure;Yarlung Zangbo River

水利水电工程的开发为人类提供发电、防洪、供水等综合效益，同时也对本地鱼类造成巨大的生存威胁。（剩余8719字）