| Nutrient and chlorophyll a anomaly in red-tide periods of 2003-2008 in Sishili Bay, China |
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| 作者姓名： | 郝彦菊 唐丹玲 喻龙 邢前国 |
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| 作者单位： | Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences;Research Center of Remote Sensing and Marine Ecology/Environment (RSMEE), Key Laboratory of Tropical Marine Environmental Dynamics (LED), South China Sea Institute of Oceanology, Chinese Academy of Sciences;Graduate University of Chinese Academy of Sciences;Monitoring and Forecasting Center of the Oceanic Environment of Yantai |
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| 基金项目： | Supported by the CAS/SAFEA International Partnership Program for Creative Research Teams (Nos. KZCX2-YW-T001 and KZCX2-YW- 213);the Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX2-YW-226);the National Natural Science Foundation of China (Nos. 40976091 and 31061160190) |
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| 摘 要： | Sishili Bay is the most important aquiculture and tourism area for the city of Yantai, China; however, red tides occurred frequently and have caused huge economic losses in this bay in recent years. To gain a better understanding of the local ecological environments in the bay, we conducted this research between 2003 and 2008 to analyze variations in nutrients and chlorophyll (chl-a) during high frequency red tide period (May to September). The results show that the chl-a concentration increased from 2.70 in 2003 to 7.26 mg/m3 in 2008, while the concentration of total inorganic nitrogen (TIN) and silicate (SiO3-Si) increased lineally from 5.18 and 1.45 μmol/L in 2003 to 18.57 and 9.52 μmol/L in 2008, respectively, and the annual phosphate (PO4-P) varied between 0.15 and 0.46 μmol/L. Special attention was given to a red tide in August 2007 occurred when water temperature was high and nutrient concentrations increased sharply because of a heavy rainfall. Overall, the results show the P limitation in Sishili Bay, and reveal that red tides were caused by eutrophication from terrestrial inputs and local warm weather, particularly during rainy periods. Therefore, to control red tide, greater efforts should be made to reduce sewage discharges into Sishili Bay, particularly during rainfall seasons.
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| 关 键 词： | chl-a TIN PO4-P red tide frequency Sishili Bay |
| 收稿时间： | 27 August 2007 |
Nutrient and chlorophyll a anomaly in red-tide periods of 2003–2008 in Sishili Bay, China |
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| Yanju Hao,Danling Tang,Long Yu,Qianguo Xing.Nutrient and chlorophyll a anomaly in red-tide periods of 2003-2008 in Sishili Bay, China[J].Chinese Journal of Oceanology and Limnology,2011,29(3):664-673. |
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| Authors: | Yanju Hao Danling Tang Long Yu Qianguo Xing |
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| Institution: | (1) Faculty of Marine Technology, Chonnam National University, Yeosu, Jeollanam-do, 550-749, Republic of Korea;(2) Department of Ocean Engineering, Chonnam National University, Yeosu, Jeollanam-do, 550-749, Republic of Korea |
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| Abstract: | Sishili Bay is the most important aquiculture and tourism area for the city of Yantai, China; however, red tides occurred
frequently and have caused huge economic losses in this bay in recent years. To gain a better understanding of the local ecological
environments in the bay, we conducted this research between 2003 and 2008 to analyze variations in nutrients and chlorophyll
(chl-a) during high frequency red tide period (May to September). The results show that the chl-a concentration increased from 2.70 in 2003 to 7.26 mg/m3 in 2008, while the concentration of total inorganic nitrogen (TIN) and silicate (SiO3-Si) increased lineally from 5.18 and 1.45 μmol/L in 2003 to 18.57 and 9.52 μmol/L in 2008, respectively, and the annual phosphate
(PO4-P) varied between 0.15 and 0.46 μmol/L. Special attention was given to a red tide in August 2007 occurred when water temperature
was high and nutrient concentrations increased sharply because of a heavy rainfall. Overall, the results show the P limitation
in Sishili Bay, and reveal that red tides were caused by eutrophication from terrestrial inputs and local warm weather, particularly
during rainy periods. Therefore, to control red tide, greater efforts should be made to reduce sewage discharges into Sishili
Bay, particularly during rainfall seasons. |
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