Determining temporal and spatial distribution of autotrophic picoplankton community composition through HPLC-pigment method and flow cytometry in the central Bohai Sea (China)

文献类型： 外文期刊

第一作者： Yan, Guowang

作者： Yan, Guowang;Zhang, Yaya;Li, Yu;Yan, Guowang;Jiang, Tao;Zhang, Yaya;Cui, Zhengguo;Qu, Keming;Zheng, Yaoyang;Lu, Lin;Jiang, Tao;Cui, Zhengguo;Qu, Keming

作者机构：

关键词： Synechococcus; Pico-eukaryotes; Pigments; Flow cytometry; CHEMTAX; Bohai Sea

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：5.553； 五年影响因子：5.907 ）

ISSN： 0025-326X

年卷期： 2020 年 157 卷

页码：

收录情况： SCI

摘要： The temporal-spatial distribution of marine autotrophic picoplankton (APP) in the central Bohai Sea was investigated in April (spring), June (early summer), August (summer), and October (autumn) in 2015 through a combination of HPLC-pigment method and flow cytometry. Flow cytometry results showed that APP was composed of Synechococcus (Syn) and pico-eukaryotes (PEUKs). The lowest average abundances of Syn and PEUKs was obtained in April. Afterward, the average APP density substantially increased, and Syn dominated the total cell abundances. Although generally outnumbered by Syn, PEUKs were the larger contributor to total APP carbon biomass ( > 52%) in all the cruises, except in August, when Syn bloomed. Compared with the cytometric method, HPLC-pigment CHEMTAX revealed a more sophisticated diversity of APP community. In April, diatoms were the main contributor to pico-Chl a, whereas prasinophytes became the main contributor in June and October. Syn bloom was evidenced by CHEMTAX, which revealed that it contributed 69.3% of Chl a in August. Redundancy analysis suggested that temperature was the main factor influencing the distribution of APP. Moreover, nutrients and their structures had some effects, which depended on different APP groups in the area. The accordance between CHEMTAX and cytometric method was evaluated through correlation analysis. A significantly positive correlation between cell abundance and CHEMTAX-derived Chl a was observed for Syn in August and PEUKs in June. Nevertheless, further study is needed owing to the observed discrepancies between the methods.

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