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Song X.,Ningbo Institute of Environment Protection Research and Design | Zhang J.,Zhejiang Wanli University | Bai C.,Zhejiang Wanli University | Zhou R.,Ningbo Institute of Environment Protection Research and Design | And 4 more authors.
Chinese Journal of Applied and Environmental Biology | Year: 2013

In order to evaluate the water quality of the Yongjiang River, the structure characteristics and the seasonal changes of the phytoplankton community from 13 sections were studied by the Margalef's index (D), Pielou evenness index (J'), Shannon-Wiener diversity index (H') and total tolerance index. The Two-way ANOSIM similarity analysis on phytoplankton community data, Bray-Curtis similarities on hierarchical clustering analysis and MDS standard sequence were calculated by using PREIMER 6.0 software. The results showed that there were 114 phytoplankton species, belonging to 6 phyla, 41 families and 80 genera, dominated by green algae and diatoms. The dominant species were Oscillatoria sp. and Melosira sp. The abundances were from 5.2×10 3 to 2.8714×106 ind./L with an unimodal seansonal change pattern. In most cases the peak of the abundance was presented in spring. The similarity comparison of the phytoplankton communities showed significant difference among the sections (R = 0.379, P = 0.1%) and seasons (R = 0.462, P = 0.1%). The community diversity index and algae pollution index showed that the water is polluted in the river.

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