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魏玉秋,孙军,丁昌玲.2014年夏季南海北部超微型浮游植物分布及环境因子影响[J].海洋学报,2015,37(12):56-65
2014年夏季南海北部超微型浮游植物分布及环境因子影响
Distribution and environmental impact factors of picoplankton in the northern South China Sea in summer 2014
投稿时间:2015-05-18  修订日期:2015-10-08
DOI:10.3969/j.issn.0253-4193.2015.12.006
中文关键词:  超微型浮游植物  聚球藻  原绿球藻  超微型真核藻类  南海
英文关键词:picoplankon  Synechococcus  Prochlorococcus  pico-eukaryotes  South China Sea
基金项目:国家海洋局公益性项目(201105021-03);国家重点基础研究发展计划(2015CB954002);教育部新世纪优秀人才计划(NCET-12-1065);国家自然科学基金(41176136,41276124)。
作者单位E-mail
魏玉秋 天津科技大学海洋与环境学院, 天津 300457
天津科技大学天津市海洋资源与化学重点实验室, 天津 300457 
 
孙军 天津科技大学海洋与环境学院, 天津 300457
天津科技大学天津市海洋资源与化学重点实验室, 天津 300457 
phytoplankton@163.com 
丁昌玲 天津科技大学海洋与环境学院, 天津 300457
天津科技大学天津市海洋资源与化学重点实验室, 天津 300457 
 
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中文摘要:
      利用流式细胞仪BD Accuri C6对2014年夏季南海北部超微型浮游植物进行了现场的观测研究,发现了3类超微型光合自养浮游植物,聚球藻(Synechococcus,Syn)、原绿球藻(Prochlorococcus,Pro)和超微型真核藻类(pico-eukaryotes,Euk),并对其丰度与分布以及环境因子影响进行了研究。结果表明,Syn、Pro和Euk丰度总平均值分别为5.13×103个/mL,3.27×104个/mL和1.85×103个/mL,碳生物量均值分别为1.19μg/L,1.86μg/L和4.51μg/L。Syn、Pro和Euk的丰度表现出不同的分布特征。Syn、Pro和Euk丰度分布趋势呈现近海低而外海高,Syn和Euk丰度高值区分别出现在沿岸带与陆架和上升流影响海域,Pro丰度高值区出现在沿岸带与陆架,低值区出现在上升流影响海域。Syn、Euk丰度高值区主要分布在次表层,Pro丰度高值区主要分布在真光层底部,Euk丰度垂直变化差异相对Syn和Pro较小。超微型浮游植物与环境因子的相关性分析结果表明,Syn、Pro和Euk的碳生物量均与硝酸盐、硅酸盐浓度和深度呈现负相关关系,Pro的碳生物量与磷酸盐浓度呈现正相关关系。
英文摘要:
      During summer of 2014,an investigation on the abundance and distribution of the three photosynthetic picoplankton groups of Synechococcus(Syn),Prochlorococcus(Pro) and pico-eukaryotes(Euk) in the northern South China Sea and their environmentally regulating mechanisms was carried out using flow cytometry BD Accuri C6. The results show that the average abundances of Syn,Pro and Euk were 5.13×103 cells/mL,3.27×104 cells/mL and 1.85×103 cells/mL,and the average abundances of carbon biomass were 1.19μg/L,1.86μg/L and 4.51μg/L,respectively. The cell abundance of each picoplankton group showed different distribution characteristics. The abundance of Syn,Pro and Euk was high nearshore and low off-shore. The highest abundances of Syn and Euk population both appeared in coast and continental shelf and upwelling waters. The highest abundance of Pro was observed along coast and continental shelf,while the lowest Pro population abundance was observed in upwelling waters. High values of Syn and Euk were mainly found at the surface,while high values of Pro mainly occurred at the bottom of euphotic layer. The variation in Euk distribution was less than those of Syn and Pro. The results of environmental factor correlation analysis indicated close negative correlations between picoplankton carbon biomass and nitrate concentration,silicate concentration and depth,and a significant positive correlation between picoplankton carbon biomass and phosphate concentration.
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