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Wang Dan,Huang Bangqin,Liu Xin,Liu Guimei,Wang Hui. 2014. Seasonal variations of phytoplankton phosphorus stress in the Yellow Sea Cold Water Mass. Acta Oceanologica Sinica, 33(10):124-135
Seasonal variations of phytoplankton phosphorus stress in the Yellow Sea Cold Water Mass
黄海冷水团海域浮游植物磷胁迫的季节变动
Received:August 19, 2013  Revised:May 16, 2014
DOI:10.1007/s13131-014-0547-x
Key words:alkaline phosphatase  phosphorus stress  phytoplankton  Yellow Sea Cold Water Mass, Yellow Sea
中文关键词:  碱性磷酸酶  磷胁迫, 浮游植物  黄海冷水团  黄海
基金项目:The National Natural Science Foundation of China under contract Nos 41206106 and 41222038; the National Basic Research Program of China under contract No. 2006CB400604; the National High Technology Research and Development Program under contract No. 2007AA092003-01; Cooperation on the Development of Basic Technologies for the Yellow Sea and East China Sea Operational Oceanographic System (YOOS).
Author NameAffiliationE-mail
Wang Dan Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China
Key Laboratory of Coastal and Wetland Ecosystems, Ministry of Education/Fujian Provincial Key Laboratory of Coastal Ecology and Environmental Studies, Xiamen University, Xiamen 361005, China 
 
Huang Bangqin Key Laboratory of Coastal and Wetland Ecosystems, Ministry of Education/Fujian Provincial Key Laboratory of Coastal Ecology and Environmental Studies, Xiamen University, Xiamen 361005, China bqhuang@xmu.edu.cn 
Liu Xin Key Laboratory of Coastal and Wetland Ecosystems, Ministry of Education/Fujian Provincial Key Laboratory of Coastal Ecology and Environmental Studies, Xiamen University, Xiamen 361005, China  
Liu Guimei Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China  
Wang Hui Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China  
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Abstract:
      The Yellow Sea is located between the China Mainland and the Korean Peninsula, representing a typical shallow epicontinental sea. The Yellow Sea Cold Water Mass (YSCWM) is one of the most important physical features in the Yellow Sea. The characteristics of vertical profiles and seasonal variations of biogenic elements in the YSCWM may lead the variations of nutrient availability (e.g., phosphorus) and phosphorus stress of phytoplankton. In this study, the authors surveyed the seasonal variations of phytoplankton phosphorus stress with emphasis on the effect of the YSCWM during the four cruises in April and October 2006, March and August 2007. Using both bulk and single-cell alkaline phosphatase activity (APA) assays, this study evaluated phosphorus status of phytoplankton community, succession of phytoplankton community and ecophysiological responses of phytoplankton to phosphorus in the typical region of the YSCWM. With the occurrence of the YSCWM, especially the variations of concentration of dissolved inorganic phosphorus (DIP), the results of bulk APA appeared corresponding seasonal variations. Along Transects A and B, the mean APA in August was the highest, and that in March was the lowest. According to the ELF-labeled assay’s results, seasonal variations of the ELF-labeled percentages within dominant species indicated that diatoms were dominant in March, April and October, while dinoflagellates were dominant in August. During the four cruises, the ELF-labeled percentages of diatoms except Paralia sulcata showed that diatoms were not phosphorus deficient in April 2006 at all, but suffered from severe phosphorus stress in August 2007. In comparison, the ELF-labeled percentages of dinoflagellates were all above 50% during the four time series, which meant dinoflagellates such as Alexandrium and Scrippsiella, sustained perennial phosphorus stress.
中文摘要:
      黄海是位于大陆架上的一个半封闭的浅海,黄海冷水团是黄海一个重要的海洋现象。黄海冷水团的季节性生消对生源要素(如磷元素)以及浮游植物营养盐胁迫等生物过程产生重要的影响。在本研究中,2006年4月10月以及2007年3月和8月的四个航次中,作者调查了黄海冷水团对于浮游植物磷胁迫的季节性变化。应用群落水平和单细胞水平碱性磷酸酶相结合的分析方法,研究了该海区浮游植物群落变动与磷胁迫的关系,探讨了黄海浮游植物对磷的生态生理响应。黄海冷水团的生消对于黄海的无机磷酸盐浓度和群落水平的浮游植物碱性磷酸酶浓度都呈现显著的季节性影响。在A和B断面上,浮游植物碱性磷酸酶浓度在2007年8月最高,而在2007年3月最低。通过单细胞水平碱性磷酸酶活力检测来看,浮游植物优势种在3、4、10月均是硅藻为优势类群,而在夏季8月是甲藻为优势类群,且浮游植物的磷胁迫也存在明显的季节变动。浮游植物群落水平的磷胁迫呈现夏季最强,春季最弱,甲藻比硅藻更容易诱导表达碱性磷酸酶,这表明甲藻更容易受到磷胁迫。综合浮游植物优势类群和代表种的标记情况,发现黄海表层浮游植物单细胞水平的磷胁迫在8月最强,而在4月最弱。不同浮游植物诱导表达碱性磷酸酶的特性有差异,其磷胁迫水平也存在种间差异,像黄海的亚历山大藻(Alexandrium)和斯克里普藻(Scrippsiella)等甲藻可能常年处于磷营养盐胁迫状态。
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