Nutrient and eutrophication characteristics of the Dongshan Bay, South China

Baohong Chen; Weidong Ji; Kaiwen Zhou; Qing He; Tingting Fu

doi:10.1007/s00343-014-3214-3

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Nutrient and eutrophication characteristics of the Dongshan Bay, South China

Updated：2023-05-16

- Nutrient and eutrophication characteristics of the Dongshan Bay, South China
- Journal of Oceanology and Limnology Vol. 32, Issue 4, Pages: 886-898(2014)
- Affiliations：
  
  Third Institute of Oceanography State Oceanic Administration
- Author bio：
- Funds：
- DOI：10.1007/s00343-014-3214-3
  CLC：
- Online First：11 July 2014，
  
  Published：2014
- Accepted：
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Chen, B., Ji, W., Zhou, K. et al. Nutrient and eutrophication characteristics of the Dongshan Bay, South China., Chin. J. Ocean. Limnol. 32, 886–898 (2014). https://doi.org/10.1007/s00343-014-3214-3
DOI：

Chen, B., Ji, W., Zhou, K. et al. Nutrient and eutrophication characteristics of the Dongshan Bay, South China., Chin. J. Ocean. Limnol. 32, 886–898 (2014). https://doi.org/10.1007/s00343-014-3214-3 DOI：

摘要

Abstract

We recorded NO3-N

NO2-N

NH4-N

PO4-P

SiO3-Si

salinity

and temperature data at 10 stations in the Dongshan Bay in May

June

July

August

October

and November 2008

analyzing nutrient and eutrophication characteristics. The mean concentration of dissolved inorganic nitrogen (DIN) was 0.30–0.40 mg/dm3; generally

NO3-N was the main form in most areas. The mean concentrations of PO4-P and SiO3-Si were 0.040–0.060 mg/dm3 and 1.00–1.50 mg/dm3

respectively. We proved that the majority of the SiO3-Si in the Dongshan Bay came from the Zhangjiang River

with some coming from the Bachimen Strait. DIN originated from both the Zhangjiang River and the Bachimen Strait. Most PO4-P originated from the Bachimen Strait

and some came from the Zhangjiang River. We found that P was an overall limiting factor to the phytoplankton community in most of the Dongshan Bay

and that Si and N were in surplus. However

near the Bachimen Strait Si became a limiting factor

especially for diatoms

while P and N were in comparative surplus. We used a potential eutrophication assessment method to analyze eutrophication

and showed that the most serious eutrophication occurred near the Zhangjiang River estuary and near the Bachimen Strait. In 2008

DIN levels were four times higher than that in 1988; PO4-P levels were threefold higher

while SiO3-Si was approximately double. Dissolved nutrients increased between 1988 and 2008. DIN increased at the greatest rate comparing to PO4-P and SiO3-Si

thus the N/P and N/Si mol ratios increased. Further studies on the effects of high DIN concentrations on the phytoplankton communities and marine ecosystems of the Dongshan Bay are needed.

关键词

Keywords

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