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Physicochemical conditions in affecting the distribution of spring phytoplankton community

Chinese Journal of Oceanology and Limnology 2017年第6期35卷 1342-1361页

作者：魏玉秋刘海娇张晓东薛冰 MUNIR Sonia 孙军 College of Marine and Environmental Sciences Tianjin University of Science and Technology Tianjin 300457 China Tianjin Key Laboratory of Marine Resources and Chemistry Tianjin University of Science and Technology Tianjin 300457 China Institute of Marine Science and Technology Shandong University Jinan 250110 China

To better understand the physicochemical conditions in af fecting regional distribution of phytoplankton community, one research cruise was carried out in the Bohai Sea and Yellow Sea during 3 rd and 23 th May, 2010. The phytoplankton community, including Bacillariophyta(105 taxa), Pyrrophyta(54 taxa), Chrysophyta(1 taxon) and Chlorophyta(2 taxa), had been identified and clearly described from six ecological provinces. And, the six ecological provinces were partitioned based on the top twenty dominant species related with notable physicochemical parameters. In general, the regional distributions of phytoplankton ecological provinces were predominantly influenced by the physicochemical properties induced by the variable water masses and circulations. The predominant diatoms in most of water samples showed well adaptability in turbulent and eutrophic conditions. However, several species of dinoflagellates e.g., Protoperidinium conicum, Protoperidinium triestinum, Protoperidinium sp. and Gymnodinium lohmanni preferred warmer, saltier and nutrient-poor environment. Moreover, the dinoflagellates with high frequency in the Yellow Sea might be transported from the Yellow Sea Warm Current. The horizontal distribution of phytoplankton was depicted by diatoms and controlled by phosphate concentration, while the vertical distribution was mainly supported by light and nutrients availability in the subsurface and bottom layers, respectively.

关键词： phytoplankton physicochemical conditions ecological provinces Bohai Sea Yellow Sea

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