It was found that the dominant organisms in the surface water resources in Xi an were Tubifex, Cladocera and Chironom.

• 本课题对西安市地表水源中的生物孳生进行了近2年的研究,确定出颤蚓、摇蚊幼虫和枝角类水蚤为本地区最主要的水生污染种类。