山西运城盐池湖区浮游绿藻及其分布特点

Species and Distribution of Phytoplanktonic Chlorophyta in Salt Lakes Area in Yuncheng, Shanxi Province

在山西运城盐池湖区采到的浮游绿藻共 3 3属 80种 (含变种 ) ,其中团藻目 5属 7种 ,四孢藻目 3属 3种 ,绿球藻目 2 0属 51种 ,鼓藻目 5属 1 9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 .0 1 1 % -0 .0 5% )、混盐水体 (含盐量 0 .0 5% -3 % )、真盐水体 (含盐量 3 % -4 % )和高盐水体 (含盐量4 % -3 4 .7% ) .由于受含盐量的影响 ,浮游绿藻在 4种水体中的分布有明显差异 ,总的趋势是含盐量增加 ,种类数减少 .

A total of 80 species of phytoplanktonic Chlorophyta were collected from the salt lake area in Yuncheng, Shanxi Province, North China. Among them 5 genera 7taxa belong to Volvocales, 3 genera 3 taxa to Tetrasporales, 20 genera 51 taxa to Chlorococcales and 5 genera 19 taxa to Desmidiales. Concerning the salt concentration of the water, 4 types can be divided, i.e. fresh water (salt concentration 0.001%-0.05%), mesohalinous water (salt concentration 0.05%-3%), euhalinous water (salt concentration 3%-4%) and polyhalinous water (salt concentration 4%-34.7%). Because of the effect of different salt concentration the difference is evident in the distribution of phytoplanktonic Chlorophyta in 4 types of the water. It is shown that the higher salinity, the fewer number of species.