Long-term nutrient variation trends and their potential impact on phytoplankton in the southern Yellow Sea, China

The concentration and composition of nutrients, such as N, P, and Si, respond to biogeochemical processes and in turn, impact the phytoplanktons’ community structure and primary production. In this study, historical data was systematically analyzed to identify long-term variations in nutrient trends...

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Bibliographic Details
Published in:Acta oceanologica Sinica 2022-06, Vol.41 (6), p.54-67
Main Authors: Wang, Yan, Liu, Yongjian, Guo, Hao, Zhang, Haibo, Li, Dongmei, Yao, Ziwei, Wang, Xiaocheng, Jia, Chuan
Format: Article
Language:English
Subjects:
Abundance
Climatology
Community structure
Diatoms
Dinoflagellata
Dinoflagellates
Dominant species
Earth and Environmental Science
Earth Sciences
Ecology
Engineering Fluid Dynamics
Environmental Chemistry
History
Long-term changes
Marine & Freshwater Sciences
Marine microorganisms
Microorganisms
Mineral nutrients
Nitrogen
Noxious animals
Nutrients
Oceanography
Phytoplankton
Plankton
Primary production
Ratios
Red tide
Red tides
Trends
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Summary:The concentration and composition of nutrients, such as N, P, and Si, respond to biogeochemical processes and in turn, impact the phytoplanktons’ community structure and primary production. In this study, historical data was systematically analyzed to identify long-term variations in nutrient trends, red tide frequency, phytoplankton community abundance, and dominant species succession in the southern Yellow Sea (SYS). Results showed that N/P concentration ratios dramatically increased as a function of increasing dissolved inorganic nitrogen concentrations, and Si/N concentration ratios were generally larger than 1, indicating that N limitation morphed to P limitation and potentially to Si limitation, which impacted the phytoplankton community. Furthermore, inter-annual trends over the past 50 years show that phytoplankton community abundance has been higher in spring and summer, relative to autumn and winter. Moreover, with respect to red tide frequency, diatom abundance gradually decreased, while that of dinoflagellates gradually increased. Dominant species succession showed that the phytoplankton community exhibited an evident tendency to transform from diatoms to dinoflagellates. These research results clearly depict the presence of an important correlation between the phytoplankton community and nutrient structure in the SYS.
ISSN:0253-505X
1869-1099
DOI:10.1007/s13131-022-2031-3