中文摘要：

通过多年野外考查，在山西运城盐池湖区采集到蓝藻共17属35种（含变种），其中色球藻科9属19种，胶须藻科1属1种，颤藻科4属12种，念珠藻科3属3种。该区域的水体根据其含盐量的不同可分为4种类型：淡水水体（含盐量0．001％～0．05％）、混盐水体（含盐量0．05％～3％）、真盐水体（含盐量3％～4％）和高盐水体（含盐量4％～34．7％）。受含盐量的影响，蓝藻在各类水体中的分布有明显差异，随含盐量增加，种类数减少，在高盐水体未见分布。与国内其它3个盐湖藻类的分布相比较，蓝藻在混盐水体比淡水水体具有更高的相似性。

英文摘要：

Field investigation over many years has found 35 species （including varieties） and 17 genera of Cyanophyta in the salt lake region of Yuncheng County,Shanxi province ,and the species and genera consist of 19 species and 9 genera of Chroococcaceae, 1 genus and 1 species of Rivulariaceae, 12 species and 4 genera of Oscillatoriaceae,and three species and three genera of Nostocaceae. The waters of the region fall into four types according to their salt contents,fresh waters （with salt content at 0. 001 %-0.05 %）,mesohalinous waters （with salt content at 0.05%-3%）,euhalinous waters （with salt content at 3%-4%） and polyhalinous waters （with salt content at 4%- 34. 7%）. Because of salt influences on Cyanophyta, Cyanophyta distribution remarkably differ among different waters,increasing in Cyanophyta species and genus numbers with increased salt content and coming to null with polyhalinous water. Compared with the distributions of Cyanophyta in other three salt lakes of China ,Cyanophyta distributions in polyhalinous wa ters is more similar than those in freshwaters.