The Relationship between the Skeletonema costatum Red Tide and Enviromnental Factors in Hongsha Bay of Sanya, South China Sea

文献类型： 外文期刊

第一作者： Li, Chunqiang

作者： Li, Chunqiang;Zhu, Baibi;Liu, Zhixin;Cui, Baiming;Wu, Jingrui;Li, Bin;Yu, Haichuan;Peng, Ming;Chen, Hong

作者机构：

关键词： Algal blooms;monitoring;diatoms;environmental factors;Skeletonema costatum;Hongsha Bay;South China Sea

期刊名称：JOURNAL OF COASTAL RESEARCH （ 影响因子：0.854； 五年影响因子：1.072 ）

ISSN： 0749-0208

年卷期： 2009 年 25 卷 3 期

页码：

收录情况： SCI

摘要： The red tide in Hongsha Bay caused by Skeletonema costatum (S. costatum) from April 27 to May 4, 2006, was monitored in this study. The dynamic variety of environmental factors, including chlorophyll a (chl a), temperature, salinity, pH, dissolved oxygen, chemical oxygen demand, nitrate, ammonium, nitrite, phosphate (PO43-), silicate, and iron (Fe), was observed and analyzed during the red tide in Hongsha Bay for the first time. The results indicated that the concentration of dissolved inorganic nitrogen was high (26.34 mu mol/L) in Hongsha Bay. Because of the heavy rainfall from April 13 to 15, a large input of nutrients surged into the bay, causing an increase in the concentration of various nutrients, especially PO43-,, which showed an obvious increase (from 0.72 to 1.45 mu mol/L). The abundant nutrients provided fundamental nutrient supply for the rapid proliferation of S. costatum. Three critical environmental factors, including water temperature, and PO43- and Fe concentration, played an important role in this red tide. Water temperature had a significant positive correlation with chl a. The water temperature shift was one of the critical environmental factors affecting the S. costatum red tide in Hongsha Bay. With the occurrence of the red tide, the concentration of PO43- rapidly decreased. Inorganic PO43- was rapidly depleted at the blooming stage, causing the red tide to gradually dissipate. Phosphate was the limiting factor of S. costatum proliferation in this red tide. Iron was also a factor. Salinity shift had little effect on the growth of S. costatum.

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