摘要
三峡水库建成后,在三峡水库现行的水位调度模式下,位于库尾上游的长江江津段的水文特征在夏半年汛期有所变化,使得消落区受汛期水淹的时间和深度有所加大,从而引起自然消落区的植物空间分布和种类组成发生改变.2012年汛期5月及汛后11月采用样带样方法对长江江津段中游的石栏子（上游）、上渡口（中游）、芦蒿坝（下游）3个样地的194~197m,197~200m消落区及200m以上非消落区维管植物进行调查发现：消落区有维管植物61种,其中194~197m高程带37种,197~200m高程带57种,多为草本植物;200m以上非消落区高程乔木、灌木、草本植物56种;消落区的植物的稳定性受水淹、航运、淘沙金、挖河沙等因素共同影响.
With the current scheduling and management model of water level of the Three Gorges Reser‐voir ,the completion of the reservoir construction has resulted in considerable changes in the hydrological characteristics in the Jiangjin section of the Yangtze River ,which is located upstream of the reservoir ,dur‐ing the flooding season ,thus extending the flooded time and depth in the riparian zone （or water‐level fluc‐tuating zone） ,and the spatial distribution of plant species and their composition in the zone have underg‐one changes accordingly .The water level in the study section was 193 m in May ,2012 （before flood） and 192 m in November （after flood） ,and a survey was made of the vascular plants at Shilanzi （194-197 m , upstream ） and Shangdukou （197-200 m ,middle） in the riparian zones and at Luhaoba （〉200 m ,dow n‐stream ） in the non‐riparian zone of Jiangjin with the belt transect method and the quadrat method .A total of 61 vascular plant species （mostly herbs） were found in the riparian zones ,of which 37 were distributed in the 194-197 m zone and 57 in the 197 -200 m zone;and 56 species were recorded in the non‐riparian zone （above 200 m） ,including trees ,shrubs and herbs .Plant stability in the riparian zones was shown to be co‐influenced by flooding ,shipping ,golding ,sand dredging and other human activities .
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第11期99-105,共7页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金资助项目(31070474)
关键词
消落带
植物空间分布
影响因素
长江江津段
water-level fluctuating zone
plant spatial distribution
influencing factor
Jiangjin Section of the Yangtze River
