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春、夏季秦皇岛海域超微型浮游植物
引用本文:赵相伟,魏玉秋,孙军,张桂成,赵亮,贾岱. 春、夏季秦皇岛海域超微型浮游植物[J]. 海洋学报, 2020, 42(2): 106-114. DOI: 10.3969/j.issn.0253-4193.2020.02.011
作者姓名:赵相伟  魏玉秋  孙军  张桂成  赵亮  贾岱
作者单位:1.山东大学 海洋研究院,山东 青岛 266237
基金项目:天津市教委科研计划项目(2017KJ012)。
摘    要:2017年6月和8月,通过对秦皇岛海域的超微型浮游植物进行现场调查和流式细胞仪分析,发现了聚球藻(Synechococcus)和超微型真核藻类(picoeukaryotes)两大类群,其中聚球藻又分为聚球藻Ⅰ和聚球藻Ⅱ两个亚群。调研期间,正处于秦皇岛海域褐潮高发期。通过分析超微型浮游植物细胞丰度、碳生物量及分布特点,研究了秦皇岛海域在褐潮高发期超微型浮游植物分布及相关环境因子影响。结果表明,6月份超微型真核藻、聚球藻Ⅰ和聚球藻Ⅱ平均丰度分别为1.14×104个/mL、4.02×104个/mL和1.04×104个/mL,碳生物量均值分别为27.22μg/L、8.49μg/L和2.27μg/L;在8月份超微型真核藻、聚球藻Ⅰ和聚球藻Ⅱ平均丰度分别为3.27×103个/mL、5.79×104个/mL和2.58×104个/mL,碳生物量均值分别为6.35μg/L、13.41μg/L和5.83μg/L。超微型真核藻、聚球藻Ⅰ和聚球藻Ⅱ在6月份和8月份表现出不同的分布...

关 键 词:超微型浮游植物  褐潮  环境因子  秦皇岛
收稿时间:2019-03-12
修稿时间:2019-06-13

Picophytoplankton from Qinhuangdao coastal waters in spring and summer
Zhao Xiangwei,Wei Yuqiu,Sun Jun,Zhang Guicheng,Zhao Liang and Jia Dai. Picophytoplankton from Qinhuangdao coastal waters in spring and summer[J]. Acta Oceanologica Sinica (in Chinese), 2020, 42(2): 106-114. DOI: 10.3969/j.issn.0253-4193.2020.02.011
Authors:Zhao Xiangwei  Wei Yuqiu  Sun Jun  Zhang Guicheng  Zhao Liang  Jia Dai
Affiliation:1.Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China2.Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, China3.Research Centre for Indian Ocean Ecosystem, Tianjin University of Science and Technology, Tianjin 300457, China
Abstract:During June and August 2017, two picophytoplankton groups including Synechococcus and picoeukaryotes were found in Qinhuangdao coastal waters, and Synechococcus could be divided into two sub-groups of Synechococcus Ⅰ and Synechococcus Ⅱ. During the sampling period, it was during high-incidence period of brown tide. To investigate the effects of the related environmental factors on the spatical distributions of picophytoplankton in Qinhuangdao coastal waters, we compared their cell abundances, carbon biomass and distributional characteristics during the brown tide. The results showed that the average abundances of picoeukaryotes, Synechococcus Ⅰ and Synechococcus Ⅱ in June were 1.14×104 cell/mL, 4.02×104 cell/mL and 1.04×104 cell/mL, respectively, and the average carbon biomass were 27.22 μg/L, 8.49 μg/L and 2.27 μg/L respectively. While in August, the average abundances of picoeukaryotes, Synechococcus Ⅰ and Synechococcus Ⅱ were 3.27×103 cell/mL, 5.79×104 cell/mL and 2.58×104 cell/mL, and the average carbon biomass were 6.35 μg/L, 13.41 μg/L and 5.83 μg/L respectively. The abundance of picoeukaryotes decreased by an order of magnitude from June to August, indicating that the growth of dominant species of brown tide was limited by high temperature and low nutrients in August. Picoeukaryotes, Synechococcus Ⅰ and Synechococcus Ⅱ showed different distributions in June and August. Synechococcus Ⅰ and Synechococcus Ⅱ increased gradually from estuary to nearshore in June, while picoeukaryotes showed a downward trend. Inversely, picoeukaryotes and Synechococcus Ⅰ showed a decreasing trend from estuary to nearshore in August, and the distribution character of Synechococcus Ⅱ abundance was not obvious in Qinhuangdao coastal waters, mainly existing in surface layer. The results of correlation analysis with related environmental factors indicated that nitrate and ammonium salt were the key factor in controlling the growth of Synechococcus Ⅰ in June while picoeukaryotes was limited by the silicate concentration. There was no significant correlation between Synechococcus Ⅱ and environment factors in June. In August, the growth of picoeukaryotes was affected by a variety of environmental factors, such as nitrate, nitrite, silicate, phosphate, temperature and light while Synechococcus Ⅰ was positively correlated with nitrate. The temperature and light were the key factors affecting the Synechococcus Ⅱ distribution in August.
Keywords:picophytoplankton  brown tide  environmental factors  Qinhuangdao
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