三北地区内陆盐水的原生动物

1990-1991年在三北地区盐度0.57-214‰的28个内陆水体,采集了162号浮游动物水样.共见到原生动物58种,其中肉足虫13种,纤毛虫45种.结果表明,原生动物,特别是纤毛虫类是内陆盐水浮游动物群落结构的重要组成部分,在一些超盐水体往往密度较大,有时成为优势种.随着盐度升高,原生动物总种数和多样性指数均趋于减小,而其密度和生物量却显着增大.文中讨论了内陆盐水原生动物区系的种类组成和分布及其与环境因子的关系.  

PROTOZOA FROM INLAND SALINE WATERS IN NORTH CHINA

The protozoan fauna were investigated in 1990 and 1991 in 28 localities withsalinity ranging from 0.57 to 214‰,in Sanbei districts of northern China. Onehundred and sixty-two samples were collected from these localities,and 13 speciesof Sarcodina and 45 species of Ciliata were found.Protozoa,especially ciliates playan important role in structuring the community of zooplanktons in inland salinewaters. The density and biomass of ciliates is usually higher in hypersaline waters,and ciliates may dominate in the community in some localities.The total numberof species and divcrsity index of protozoan tend to dicline as the salinity increases,and the density and biomass of the organisms increased obviously with the rise ofsalinity. The species composition,distribution of protozoa in inland saline waterswere discussed, as well as the relationship between protozoan fauna and some environmental factors.