水电开发对金沙江中下游水生植物分布格局的影响

Impact of Hydropower Project on Distribution Patterns of Aquatic Plants in Middle and Lower Reaches of Jinsha River

摘要:

采用随机多次小样本法,对金沙江中下游河漫滩水生植物进行了2次调查.共采集到水生植物27科54属75种.物种数最多的科为蓼科(13种),占全部种数的17.3%,禾本科(11种)和菊科(9种)次之,分别占种类全部的14.7%和12.0%.分布范围较广的科主要有蓼科、禾本科和藜科.预计白鹤滩水电站建设后,局部河漫滩的水生植物分布及生物量将有所增加.

Abstract:

Based on data from random sampling method repeatedly,aquatic plants have been surveyed twice in the middle and lower reaches of Jinsha River floodplain.There are about 75 species of aquatic plants belonging to 54 genera and 27 families.The decrease order of the families is Polygonaceae(13 species),Gramineae(11 species) and Compositae(9 species)accounting for 17.3%,14.7%and 12.0%individually.The distribution ranges of Polygonaceae,Gramineae and Chenopodiaceae are wider than the others.Biomass and distribution range of aquatic plant will be increased in partial floodplain after Baihetan hydropower station is constructed.