The spatial distribution of abundance and production of bacterioplankton in and near Chukchi Sea, Arctic Ocean

Gao Yuan; He Jianfeng; Chen Min; Lin Ling; Zhang Fang

doi:10.3969/j.issn.0253-4193.2015.08.009

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Gao Yuan, He Jianfeng, Chen Min, Lin Ling, Zhang Fang. The spatial distribution of abundance and production of bacterioplankton in and near Chukchi Sea, Arctic Ocean[J]. Haiyang Xuebao, 2015, 37(8): 96-104. doi: 10.3969/j.issn.0253-4193.2015.08.009

Citation:

Gao Yuan, He Jianfeng, Chen Min, Lin Ling, Zhang Fang. The spatial distribution of abundance and production of bacterioplankton in and near Chukchi Sea, Arctic Ocean[J]. Haiyang Xuebao, 2015, 37(8): 96-104. doi: 10.3969/j.issn.0253-4193.2015.08.009

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The spatial distribution of abundance and production of bacterioplankton in and near Chukchi Sea, Arctic Ocean

doi: 10.3969/j.issn.0253-4193.2015.08.009

1.
College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China;Key Laboratory for Polar Science, Polar Research Institute of China, State Oceanic Administration, Shanghai 200136, China
2.
Key Laboratory for Polar Science, Polar Research Institute of China, State Oceanic Administration, Shanghai 200136, China
3.
College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China;State Key laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China

Received Date: 2014-11-24
Rev Recd Date: 2014-12-31

Abstract

Abstract

The abundance and production of bacterioplankton with their correlations with environmental factors were investigated in the Chukchi Sea and its northern border areas in 2012 summer. The abundances of bacterioplankton in and near the Chukchi Sea range from 0.56×10⁸ to 6.41×10⁸ cells/dm³, with an average of 2.25×10⁸ cells/dm³. Bacterial productions are between 0.042 mg/(m³·d) (in carbon) and 1.92 mg/(m³·d) (in carbon), with an average of 0.54 mg/(m³·d) (in carbon). These results are similar with previous studies in the Arctic Ocean. In the shelf region, the abundances and productions of bacteria are obviously higher than those in the northern border areas, but the specific bacterial production is lower. The environmental correlation analysis shows that bacterial abundance is positively correlation with temperature and Chl a concentration (p<0.01), indicating that both the increase of water temperature and phytoplankton biomass will enhance the growth of bacterioplankton in the Chukchi Sea which will further promote the role of bacteria in the marine ecosystem and carbon cycle. On the contrary, bacterial production has no correlation with environmental factors in the shelf region, but shows a significant positive correlation with Chl a in northern border area (p<0.01), suggesting that the growth of bacteria mainly depends on DOC released by phytoplankton in border area. The simplicity of carbon source may restrict the productivity of bacteria in the northern border area, and the DOC released from melting ice will stimulate the bacterial activity.
- bacterioplankton,
- bacterial production,
- Arctic,
- Chukchi Sea,
- environmental correlation

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References(24)

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