| GAO Yuan,HE Jianfeng,CHEN Min,LIN Ling,ZHANG Fang. 2017. Factors dominating bacterioplankton abundance and production in the Nordic seas and the Chukchi Sea in summer 2012. Acta Oceanologica Sinica, 36(8):153－162 |
| Factors dominating bacterioplankton abundance and production in the Nordic seas and the Chukchi Sea in summer 2012 |
| 影响北欧海和楚科奇海夏季细菌丰度和生产力的因素 |
| Received:October 19, 2016 |
| DOI：10.1007/s13131-017-1031-1 |
| Key words:bacterioplankton abundance production Arctic Ocean environmental factors |
| 中文关键词: 浮游细菌 丰度 生产力 北冰洋 环境因子 |
| 基金项目:The National Natural Science Foundation of China under contract Nos 41476168 and 41206189; the Chinese Polar Environment Comprehensive Investigation and Assessment Programs under contract No. CHINARE-2011-2015; the Public Science and Technology Research Funds Projects of Ocean under contract No. 20110522. |
| Author Name | Affiliation | E-mail | | GAO Yuan | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
State Oceanic Administration Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China | | | HE Jianfeng | State Oceanic Administration Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China | hejianfeng@pric.org.cn | | CHEN Min | College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China | | | LIN Ling | State Oceanic Administration Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China | | | ZHANG Fang | State Oceanic Administration Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China | |
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| Abstract: |
| Abundance and production of bacterioplankton were measured in the Nordic seas and Chukchi Sea during the 5th Chinese Arctic Research Expedition in summer 2012. The results showed that average bacterial abundances ranged from 3.31×1011 cells/m3 to 2.25×1011 cells/m3, and average bacterial productions (calculated by carbon) were 0.46 mg/(m3·d) and 0.54 mg/(m3·d) in the Nordic seas and Chukchi Sea, respectively. T-test result showed that bacterial abundances were significantly different between the Nordic seas and Chukchi Sea, however, no significant difference was observed regarding bacterial productions. Based on the slope of lg bacterial biomass versus lg bacterial production, bacterial communities in the Nordic seas and Chukchi Sea were moderately dominated by bottom-up control. Both Pearson correlation analysis and multivariable linear regression indicated that temperature had significant positive correlation with bacterial abundance in the Chukchi Sea, while no correlations with productions in both areas. Meanwhile, Chl a had positive correlations with both bacterial abundance and production in these two regions. As the temperature and Chl a keep changing in the future, we suggest that both bacterial abundance and production been hanced in the Chukchi Sea but weaken in the Nordic seas, though the enhancement will not be dramatic as a result of higher pressure of predation and viral lysis. |
| 中文摘要: |
| 2012年夏季中国第五次北极科学考察期间，对北欧海和楚科奇海的细菌丰度和生产力进行了测定。结果显示在北欧海和楚科奇海，细菌丰度平均为3.31×1011 cells/m3和2.25×1011 cells/m3，细菌生产力（以碳计）平均为0.46 mg/（m3·d）和0.54 mg/（m3·d）.t检验的结果显示在这两个海区，细菌丰度存在显著性差异;相反，细菌生产力则没有。根据细菌生物量与生产力对数值之间的关系可以看出，北欧海和楚科奇海的细菌群落受到中等强度的上行作用的控制。皮尔森相关性分析和多元线性回归的结果指出，温度与楚科奇海细菌丰度之间存在显著正相关关系，而与北欧海和楚科奇海的细菌生产力之间不存在相关性。同时，叶绿素a浓度与这两处海域的细菌丰度和生产力之间均存在正相关关系。在未来的一段时期内，随着温度与叶绿素a浓度的变化，我们认为楚科奇海的细菌丰度和生产力均将得到加强，而北欧海的细菌丰度和生产力则会遭到削弱。然而由于捕食作用以及病毒融解的调控，细菌丰度和生产力的变化将会变得不如预期明显。 |
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