RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2008, Vol. 17 >> Issue (4): 612-612.

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CHARACTERISTICS OF PHYTOPLANKTON AND WATER POLLUTION IN LOWER REACHES OF JIALING RIVER IN SPRING

ZOU Xiaobing1, ZENG Ting1, TRINA MACKIE2, XIAO Shangyou1, XIA Zhining1     

  • Received:1900-01-01 Revised:1900-01-01 Online:2008-07-20

Abstract:

Water quality and the distribution of phytoplankton were investigated in lower reach of Jialing River in the spring of 2006,to analyze the characteristics of phytoplankton and water pollution.The results showed that there were 42 genera and 98 species (including varieties) of phytoplankton belonging to 7 phyla.Xanthophyta and Chlorophyta had high abundance,and became dominant groups together with Bacillariophyta.The dominant species are 〖WTBX〗Tribonema vulgare〖WTBZ〗 of Xanthophyta,〖WTBX〗Chlorella〖WTBZ〗 of Chlorophyta and 〖WTBX〗Cyclotella〖WTBZ〗 of Bacillariophyta.In May the algae species and abundance were both lower than that of in April because of more rain in May.At Shimen Bridge the water flow was fast,the algal density was the lowest;at Hualongqiao the water flow was slow,the algal density was the highest, indicating that water velocity contributed some effects of phytoplankton species and abundance.At each sampling site ammonia contents were very high,so ammonia pollution was the main pollution of the Jialing River.And the phosphate contents were also high,nutrient contents all transcended the lowest limited standard of water eutrophication,the water pollution was serious in the Jialing River.Water pollution was evaluated by saprobiologic analysis and algae diversity index.The pollution belonged to medium type and the agriculture and industrial pollution could not be neglected.〖

 

Key words: Jialing River, phytoplankton, nutrient, water pollution〖  

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