Phytoplankton diversity and pollution status in main channel of Luanhe River ZHOU Xu 2shen 1 , QI Xiang 2hua 2 , WU Xiao 3 , SUN Feng 1 , SUN Kai 2yan 1 , WANG Yi2zhen 1 , ZHANG Jun 1 , LU
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Abstract:
The phytoplankton diversity in the Luanhe River was sampled and analyzed in August and October 2011. The results showed that( 1) a total of 99 taxa with 79 genera and 8 phyla are identified, indicating a high diversity of species; (2) the domi 2 nant group is blue 2green algae in the phytoplankton community composition. T he highest proportion of cell density is blue 2green algae, followed by green algae and diatoms; ( 3) Cell density and biomass of phytoplankton have unevenly spatial distribution, and their changes show the same trend along the river. Both values are lower in the upstream but higher in the downstream, in2 dicating a lower level of eutrophication in the upstream while a higher level of eutrophication in the downstream; ( 4) Based on the water pollution analysis using the Pielou index and Simpsen index, the upstream has light level of pollution whereas the downstream has middle level of pollution; and(5) the pollution types of phytoplankton indicators suggest that the pollution indi 2 cator species are higher in October than those in August. T his study provides important reference for the pollution status and a 2 quatic ecosystem restoration in the Luanhe River.
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