生态学报2026，Vol.46Issue(1)：541-554,14.DOI:10.20103/j.stxb.202502140302
三峡库区库岸坡面-消落带植物群落组成及分布特征
Plant community composition and distribution characteristics on the bank slope and drawdown zone of the Three Gorges Reservoir
摘要
Abstract
The bank slope and drawdown zone represent continuous geographical units in spatial terms.Analyzing the diversity and distribution characteristics of plant communities within the shoreline-drawdown zone can inform the optimization of vegetation restoration models in reservoir areas,thereby contributing to enhanced ecosystem stability.This study identified three sampling sites located in the upper,middle,and lower reaches of the Three Gorges Reservoir:Banan District in Chongqing,Zhongxian County in Chongqing,and Zigui County in Yichang.The research focused on examining and analyzing the composition and distribution of plant communities across various elevation levels:145-155 m(Zone E1),155-165 m(Zone E2),165-175 m(Zone E3),and above 175 m(Zone E4,shoreline).The study yielded the following findings:(1)A total of 178 plant species were identified,representing 55 families and 133 genera,with a predominance of annual and perennial plants.The families Asteraceae and Poaceae exhibited the highest species richness.(2)In the shoreline-drawdown zone,dominant plant species included Cynodon dactylon,Eleusine indica,Xanthium strumarium,and Cyperus rotundus,with variations in dominance observed across different elevation levels.(3)The α diversity indices of the plant communities exhibited an increasing trend with elevation,whereas the β diversity index revealed significant differences in plant communities between Zone E1 and Zone E4,yet no significant differences were observed between Zone E2 and Zone E3.(4)The predominant plant communities within the shoreline-drawdown zone were characterized by the following associations:Ass.Cynodon dactylon+Erigeron canadensis+Bidens frondosa+Cyperus rotundus,Ass.Xanthium strumarium+Alternanthera philoxeroides+Cynodon dactylon,Ass.Eleusine indica+Phragmites australis+Erigeron canadensis,Ass.Ipomoea batatas+Glycine max.These four communitiess were primarily distributed in the Zone E1,E2,E3 and E4,respectively.(5)Soil moisture content and flooding duration were identified as the primary factors influencing the distribution of plant communities,while total nitrogen and total phosphorus levels in the soil also exerted significant effects.The results of this study offer valuable scientific insights for the selection of plants suitable for ecological restoration and for promoting species diversity within the shoreline-drawdown zone of the Three Gorges Reservoir area.关键词
三峡水库/消落带/库岸坡面/优势植物/植物群落Key words
Three Gorges Reservoir/drawdown zone/bank slope/dominant plant/plant community引用本文复制引用
邹皙骋,魏振康,王天巍,何欢,黄桂云,吴笛,伍玉鹏,胡荣桂,姜炎彬..三峡库区库岸坡面-消落带植物群落组成及分布特征[J].生态学报,2026,46(1):541-554,14.基金项目
国家自然科学基金项目(U2240222) （U2240222）
