Evol Ecol Res 19: 407-421 (2018)     Full PDF if your library subscribes.

Communities and diversities of bacteria and Archaea in Arctic seawater

Jia-Pei Liu*, Ying-Ping Fan*, Xue-Zhu Liu and Jian-Xin Wang#

Marine Microorganism Ecological and Application Laboratory, Zhejiang Ocean University, Zhejiang, China

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ABSTRACT

Questions: (1) What is the diversity and abundance of bacteria and Archaea in the surface seawater off the Svalbard Archipelago? (2) What are some prokaryotic functions in this region?

Methods: We sampled five different locations in the Svalbard Sea (Arctic Ocean). We used high-throughput sequencing based on 16S rRNA genes to investigate the diversity and abundance of bacteria and Archaea. We also used PICRUSt analysis to determine the functional sequence copies in the surface seawater.

Results: Proteobacteria were the dominant taxon in all samples, followed by Bacteroidetes, Actinobacteria, Planctomycetes, Verrucomicrobia, Cyanobacteria, Chloroflexi, NKB19, Acidobacteria, Firmicutes, and Armatimonadetes. α-Proteobacteria and γ-Proteobacteria dominated among the Proteobacteria. At site BJ7, β-Proteobacteria and γ-Proteobacteria were more abundant than the other Proteobacteria. Crenarchaeota was the most abundant phylum of Archaea. Functional analyses showed that the copy reads of functional genes that pertain to carbon cycling are the most abundant, with methane metabolism dominant; the fewest reads appeared in phosphonate and phosphinate metabolism.

Keywords: Archaea, Arctic Sea, bacteria, biotic community, function, Svalbard Archipelago.

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