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

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

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)153-162
Number of pages10
JournalActa Oceanologica Sinica
Volume36
Issue number8
DOIs
StatePublished - Aug 1 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Aquatic Science

Keywords

  • Arctic Ocean
  • abundance
  • bacterioplankton
  • environmental factors
  • production

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