Biodiv Sci ›› 1998, Vol. 06 ›› Issue (2): 81-86.DOI: 10.17520/biods.1998012

• 论文 •     Next Articles

The diversity status of freshwater protozoans and the pollution stress on protozoa in China

SHEN Yun-Fen   

  1. Institute of Hydrobiology , the Chinese Academy of Sciences , Wuhan  430072
  • Received:1997-09-04 Revised:1997-11-14 Online:1998-05-20 Published:1998-05-20

Abstract: The present paper introduced a broad outline of the diversity of protozoa on the globe , the position in the biology and the relation to the human being. Considering that the protozoa in freshwater as an aggregate group ecologically , its diversity and stress could be discussed. The stress resulting from anthropogenic sources in an eutrophication lake —Donghu Lake in a period of half a century resulted in a ten2fold increase of protozoan density and a succession of dominant species. The industrial pollution from the bank of the Three2Gorges Area of the Yangtze River damaged at least 70 % species of protozoans. In the largest tributary of the Yangtze River , the Hanjiang River , a resource of drinking water , the protozoan diversity index indicated that water quality was in a critical status. In the unexploited Wuling Mountains Area in southwestern China , the protozoan diversity demonstrated that the aquatic ecosystem in this area was healthy and stable.