Response of phytoplankton assemblages to the water-sediment regulation in the adjacent sea of the Yellow River mouth

Su Zhijuan; Wang Yujue; Dong Zhijun; Zhang Yiwen; Liu Dongyan; Wang Yanxia

doi:10.3969/j.issn.0253-4193.2015.04.006

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Su Zhijuan, Wang Yujue, Dong Zhijun, Zhang Yiwen, Liu Dongyan, Wang Yanxia. Response of phytoplankton assemblages to the water-sediment regulation in the adjacent sea of the Yellow River mouth[J]. Haiyang Xuebao, 2015, 37(4): 62-75. doi: 10.3969/j.issn.0253-4193.2015.04.006

Citation:

Su Zhijuan, Wang Yujue, Dong Zhijun, Zhang Yiwen, Liu Dongyan, Wang Yanxia. Response of phytoplankton assemblages to the water-sediment regulation in the adjacent sea of the Yellow River mouth[J]. Haiyang Xuebao, 2015, 37(4): 62-75. doi: 10.3969/j.issn.0253-4193.2015.04.006

Citation:

Su Zhijuan, Wang Yujue, Dong Zhijun, Zhang Yiwen, Liu Dongyan, Wang Yanxia. Response of phytoplankton assemblages to the water-sediment regulation in the adjacent sea of the Yellow River mouth[J]. Haiyang Xuebao, 2015, 37(4): 62-75. doi: 10.3969/j.issn.0253-4193.2015.04.006

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Response of phytoplankton assemblages to the water-sediment regulation in the adjacent sea of the Yellow River mouth

doi: 10.3969/j.issn.0253-4193.2015.04.006

1.
Hebei Key Laboratory of Environmental Evolution and Ecological Construction, College of Resources and Environment Science, Hebei Normal University, Shijiazhuang 050024, China;Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
2.
Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
3.
Hebei Key Laboratory of Environmental Evolution and Ecological Construction, College of Resources and Environment Science, Hebei Normal University, Shijiazhuang 050024, China
4.
Institute of Geographical Science, Hebei Academy of Science, Shijiazhuang 050021, China

Received Date: 2014-09-18
Rev Recd Date: 2014-12-26

Abstract

Abstract

An ecological survey was carried out in July 2013 in the Yellow River adjacent sea after the 16th water-sediment regulation,with an aim of understanding the response of phytoplankton assemblages to changed environment. The result showed that temperature and nutrient concentrations decreased gradually from the mouth of river to offshore waters,corresponding to the increased freshwater loading,and salinity increased gradually from the mouth of river to offshore waters. Nutrient concentrations at the sites near to the side of Bohai Bay displayed higher values than the Laizhou Bay. The analysis on nutrient structure indicated that DIP was absolute and relative limitation,while DSi limitation only appeared in a few sites. 100 species of phytoplankton in 60 genera of the five classes were identified from the samples,and major phytoplankton components were diatoms and dinoflagellates. In addition,a few brackish species in Cyanophyceae,Chrysophyceae,and Chlorophyceae were also identified from the river mouth,indicating the impact of salinity. Chlorophyll a concentrations and nutrient concentrations presented a significantly spatial distribution from the river mouth to offshore waters,with higher values at the sites near to the side of the Bohai Bay than the Laizhou Bay. Phytoplankton assemblages were in response to the variations of spatial environmental factors. The biomass proportions of Cyanophyceae and Chlorophyceae increased distinctly in the transections of C,D and E,indicating a strong influence of the diluted water,while diatoms and dinoflagellates in other transections with less impact from the diluted water. The results of Principal Components Analysis between phytoplankton assemblages and environmental factors indicated that DSi,DIP and salinity were key factors related to the spatial variation of phytoplankton assemblages.
- Yellow River mouth,
- phytoplankton,
- water-sediment regulation,
- salinity,
- nutrients

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References(49)

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