Factors dominating bacterioplankton abundance and production in the Nordic seas and the Chukchi Sea in summer 2012

• Published in: Acta oceanologica Sinica Vol. 36; no. 8; pp. 153 - 162
• Main Authors: Gao, Yuan, He, Jianfeng, Chen, Min, Lin, Ling, Zhang, Fang
• Format: Journal Article
• Language: English
• Published: Beijing The Chinese Society of Oceanography 01.08.2017; Springer Nature B.V; 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%State Oceanic Administration Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136,China%College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China
• Subjects: Abundance; Arctic research; Bacteria; Bacterioplankton; Biomass; Carbon; Cells; Climatology; Correlation analysis; Earth and Environmental Science; Earth Sciences; Ecology; Engineering Fluid Dynamics; Environmental Chemistry; Expeditions; Food chains; Ice; Interspecific relationships; Lysis; Marine & Freshwater Sciences; Multivariable control; Nanoplankton; Ocean circulation; Ocean temperature; Oceanography; Plankton; Polar environments; Predation; Regression analysis; Research expeditions; Seawater; Shipwrecks; Summer; Temperature; Temperature effects; 北欧; 夏季; 多元线性回归分析; 楚科奇海; 浮游细菌; 海域; 生产; 细菌丰度; Chukchi Sea; Arctic Ocean; production; environmental factors; bacterioplankton; abundance
• ISSN: 0253-505X; 1869-1099
• DOI: 10.1007/s13131-017-1031-1

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 3.31×10^11 cells/m^3 to 2.25× 10^11 cells/m^3, and average bacterial productions （calculated by carbon） were 0.46 mg/（m^3·d） and 0.54 mg/（m^3·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.