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Seasonal variations of phytoplankton phosphorus stress in the Yellow Sea Cold Water Mass

机译:黄海冷水区浮游植物磷胁迫的季节变化。

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摘要

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 ele-ments 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 phos-phorus 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 phospho-rus (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.
机译:黄海位于中国大陆和朝鲜半岛之间,是典型的浅陆上大陆海。黄海冷水团(YSCWM)是黄海最重要的物理特征之一。 YSCWM中垂直剖面的特征和生物元素的季节性变化可能导致浮游植物养分利用率(例如磷)和磷胁迫的变化。在这项研究中,作者调查了浮游植物磷胁迫的季节性变化,重点是在2006年4月和2006年10月,2007年3月和2007年8月的四次航行中,YSCWM的影响。同时使用了大量和单细胞碱性磷酸酶活性( APA)分析,这项研究评估了YSCWM典型区域中浮游植物群落的磷状况,浮游植物群落的演替以及浮游植物对磷的生态生理响应。随着YSCWM的出现,特别是溶解无机磷(DIP)浓度的变化,大量APA的结果出现了相应的季节变化。沿着样带A和样带B,8月的平均APA最高,而3月的平均APA最低。根据ELF标记的检测结果,优势种内ELF标记百分比的季节性变化表明,硅藻在3月,4月和10月占优势,而鞭毛藻在8月占优势。在四次航行中,除了Paralia sulcata以外,硅藻的ELF标记百分比表明,硅藻在2006年4月根本没有缺磷,但在2007年8月遭受了严重的磷胁迫。相比之下,ELF标记的鞭毛藻百分比都是在四个时间序列中,其含磷量超过50%,这意味着像鞭毛藻这样的单鞭毛虫会持续多年生磷胁迫。

著录项

  • 来源
    《海洋学报(英文版)》 |2014年第10期|124-135|共12页
  • 作者单位

    Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, State 0ceanic 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;

    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;

    Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, State 0ceanic Administration, Beijing 100081, China;

    Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, State 0ceanic Administration, Beijing 100081, China;

  • 收录信息 中国科学引文数据库(CSCD);
  • 原文格式 PDF
  • 正文语种 eng
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