摘要
自2006年10月始,三峡水库已经完成了从156～175 m分期蓄水过程。为进一步了解水库分期蓄水对消落区植物群落结构和分布格局的影响,在2008年的工作基础上于2011年7～8月再次对白夹溪消落区内的植物群落进行调查,对比和分析了该区域内在156 m蓄水和175 m蓄水情况下消落区植物群落的结构变化。结果表明,研究区域内共发现维管束植物39科93属101种,其中消落区内有维管束植物30科74属84种;曾经是消落区优势种的苍耳(Xanthium sibiricum)、双穗雀稗(Paspalum paspaloides)等植物分布范围明显减少;香附子(Cyperus rotundus)、西来稗(Echinochloa crusgali var.zelayensis)和合萌(Aeschynomene indica)成为该区域新生的优势植物种群。该结果提示三峡水库175 m蓄水对白夹溪消落区植物多样性及植物群落分布有重要影响。
Sinee October of 2006, the Three Gorges Reservnir （TGR） has finished the impoundment from 156 m to 175 m. In order to find the influenee of the impoundment to the plant community and its＇ pattern in the drawdown zone further, an investigation on the plant conurmnitv of the Baijia Creek was eonhleted again from July to August 2011. The plant eonmmnity and its＇ pattern under the influenee of impoundment at 175 m was compared to the 156 m. The results show 101 species of vaseula, plant belong to 39 families, 93 generas have been investigated, among, which 84 species belong to 30 families, 74 generas distributed in the drawdown zone. The distribute area of Xanthium sibiricum and Pulnhtm paspuloides, which once were dominant species in tile dawdown zone, decreased olwinusly. Cyperus rotundus, Echinochloa erusgali var. zelayensis, and Aeschynomene indica ecnne to be new dominant species in the study area. The impoundment of the TGR to 175 m influenced the plant community and its＇ pattern in the drawdnwn zone significantly.
出处
《重庆师范大学学报（自然科学版）》
CAS
北大核心
2012年第3期70-74,168-170,共8页
Journal of Chongqing Normal University:Natural Science
基金
科技部农业科技成果转化资金项目(No.2011GB2F100010)
重庆市科技攻关项目(国际科技合作基地建设/重点)(No.CSTC201120002)
关键词
三峡水库
蓄水
消落区
植物群落
Three Gorges Reservoir
impoundment
drawdown area
plant community
