香溪河库岸植物群落及分布特点调查

摘要

于2010年8月下旬，采用同样方法调查了香溪河长江入口处到峡口镇段海拔145～185m库岸带植物分布情况。结果表明：调查范围内植物有29科、59属、64种，其中禾本科（9属11种）和菊科（8属9种）20种，这两科物种数最多；主要优势物种为草、狗牙根、狗尾草（重要值分别为0．9237、0．5614、0．4283），这三种植物可作为库岸消落带生态恢复的物种；物种丰富度和多样性随海拔升高呈增加趋势，生态优势度呈减小趋势。较大可能的原因是受到淹水时间长短的影响。%This article investigates theplantdistributionalong the riversidefromthe entrance ofXiangxi River to the Yangtze RivertoXiakou Town atthe altitude of 145 -185m byusing sampling method in late August , 2010 .The results show thatthe plants belong to 29 families ,59 genera ,64 species .The maximum number of species areGramineae and Compositae ;the dominant species are Arthraxon hispidus ,Cynodon dactylon and Setaria viridis (the important values are 0 .9237 ,0 .5614 ,0 .4283) ,w hich can be used as the ecological restora-tion speciesatthebank of riparianzone .The species richness and diversity increase graduallywith the increase of altitudew hile the ecological dominance tends todecrease ,w hichis likelycaused by the duration of flooding .