Distribution and diversity of net-collected phytoplankton in the waters nearby Zhoushan Islands

doi:10.3969/j.issn.1001-909X.2016.01.010

Abstract

Abstract: The net-collected phytoplankton community and physicochemical properties of the waters nearby Zhoushan Islands during summer and autumn of 2014 were investigated. A total of 6 phyla, including 92 genera and 184 species were indentified, of which 127 diatom and 30 dinoflagellat species were found in this survey area. The species Skeletonema spp. is dominant in summer, while the dominant species in autumn consists of nine diatom species (i.e., Coscinodiscus jonesianus, Coscinodiscus oculus-iridis, Coscinodiscus argus, Coscinodiscus asteromphalus, Skeletonema spp., Pseudo-nitzschia pungens, Chaetoceros decipiens, Thalassiothrix frauenfeldii and Frustulia interposita). The phytoplankton abundance in summer (1 713.58×10⁴ ind/m³) is higher than that in autumn (1 430.30×10⁴ ind/m³). According to the results of Redundancy Analysis, the temperature, salinity, suspended particulate matter, dissolved inorganic phosphorus and nitrogen are the main environmental factors affected on the phytoplankton community in summer and autumn. Based on the analysis of the integrated historical data, the eutrophication index at the research area has increased clearly since 1996, and the structure of phytoplankton community has also changed significantly. It reflects on the cells abundance increase and the dominant species substitution.

Key words: Zhoushan Islands, phytoplankton, community composition, environmental factor

CLC Number:

Q948.8

CHEN Yue, LIU Jing-jing, JIANG Zhi-bing, HUANG Wei, SHOU Lu, ZENG Jiang-ning. Distribution and diversity of net-collected phytoplankton in the waters nearby Zhoushan Islands[J]. Journal of Marine Sciences, 2016, 34(1): 76-83.

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