Scenarios of nutrient alterations and responses of phytoplankton in a changing Daya Bay, South China Sea

The coastal ecosystem in the Daya Bay is sensitive to the environmental changes induced by highly intensive human activities. We obtained and compiled the recent 30years' field observational data on nutrients and phytoplankton communities to explore the changing ecosystem. Dissolved inorganic n...

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Bibliographic Details
Published in:Journal of marine systems 2017-01, Vol.165, p.1-12
Main Authors: Wu, Mei-Lin, Wang, You-Shao, Wang, Yu-Tu, Yin, Jian-Ping, Dong, Jun-De, Jiang, Zhao-Yu, Sun, Fu-Lin
Format: Article
Language:English
Subjects:
Bacillariophyceae
Coastal environments
Communities
Daya Bay
Ecosystems
Human influences
Limitation factor
Marine
Nitrogen
Nutrient structure changes
Nutrients
Phosphates
Phytoplankton
Phytoplankton response
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Summary:The coastal ecosystem in the Daya Bay is sensitive to the environmental changes induced by highly intensive human activities. We obtained and compiled the recent 30years' field observational data on nutrients and phytoplankton communities to explore the changing ecosystem. Dissolved inorganic nitrogen concentration (DIN) has significantly increased, while phosphate concentration (DIP) dramatically decreased because of costal anthropogenic influence. The limited factors for phytoplankton have changed from nitrogen in the 1980s to phosphate in the mid-1990s. The net-collected phytoplankton communities has the miniaturized trend, while there is drastic increase of Chlorophyll a (Chl-a) concentration. Even though the diatoms still dominate in phytoplankton community, the dominant species have slightly changed. The alga bloom greatly changed from diatoms dominated to dinoflagellates due to changes of nutrient structure. All these changes on nutrients and phytoplankton communities appear to be closely associated with human activities along the coast of the Daya Bay. •We examined long-term changes in coastal nutrient and phytoplankton.•The nutrient contents and structure have substantially changed in the past 30years.•Phytoplankton communities have been miniaturized due to environmental changes.•The alga bloom species have greatly changed from diatoms to dinoflagellates.
ISSN:0924-7963
1879-1573
DOI:10.1016/j.jmarsys.2016.09.004