Phylogenetic diversity of culturable bacteria in surface seawater from the Drake Passage, Antarctica

• Published in: Chinese journal of oceanology and limnology Vol. 34; no. 5; pp. 952 - 963
• Main Author: 李昭 邢孟欣 王伟 王丹 朱建成 孙谧
• Format: Journal Article
• Language: English
• Published: Heidelberg Science Press 01.09.2016; Springer Nature B.V
• Subjects: Actinobacteria; alpha-Proteobacteria; Antarctic region; Antarctica; Bacteria; beta-Proteobacteria; Biology; Catalase; Chemical analysis; Cladistics; Curtobacterium; Curtobacterium flaccumfaciens; Dominant species; Earth and Environmental Science; Earth Sciences; Firmicutes; Genetic diversity; Gram-positive bacteria; Halomonas; Marine; nucleotide sequences; Oceanography; Phylogenetics; Phylogeny; Proteobacteria; ribosomal RNA; rRNA 16S; Seawater; South America; Staphylococcus; Staphylococcus sciuri; Strains; Strains (organisms); summer; Surface water; Water analysis; Drake Passage; ASW, South America; PS, Antarctica; PSW, Antarctic Ocean, Drake Passage; PSW, Antarctica, Antarctic Peninsula; PSW, Argentina, Tierra del Fuego; South America; Antarctica; Antarctic region; Antarctic; culturable bacteria; catalase activities; surface seawater; phylogenetic diversity
• ISSN: 0254-4059; 2096-5508; 1993-5005; 2523-3521
• DOI: 10.1007/s00343-016-5132-z

The Drake Passage is located between the Antarctic Peninsula and Tierra del Fuego in the south of South America. Surface seawater samples were collected at seven sites in the Drake Passage during the austral summer of 2012. The 16S rRNA sequences were analyzed from 187 isolated bacterial strains. Three phyla, 29 genera and 56 species were identified. The three phyla were Actinobacteria, Firrnicutes and Proteobacteria; the Proteobacteria included α-Proteobacteria, β-Proteobacteria and γ-Proteobacteria. γ-Proteobacteria, Actinobacteria and Firmicutes were the dominant class or phyla in terms of quantity and species. Gram-positive bacteria （Actinobacteria and Firmicutes） accounted for 57.8% of all types identified. There were nine dominant genera, including Curtobacterium, Staphylococcus, and Halomonas, and 14 dominant species including Curtobacterium flaccumfaciens, Curtobacterium pusillum, and Staphylococcus sciuri. Of the strains identified, 87.2% were catalase positive or weakly positive.