Diversity of cultivated heterotrophic bacteria selected from surface waters of the Vostok Bay of the Japanese Sea

Abstract

In this article, the taxonomic diversity of cultivated heterotrophic microorganisms of the surface waters of Bay Vostok of Peter the Great Bay of the Japan Sea was considered. In the bay Vostok total number of heterotrophic microorganisms was 2,03-105 КОЕ/ml which can be attributed to mezazoprobnye sea water. Microorganisms isolated from this coastal area are represented by 4 phylums. The cultivated microorganisms were dominated by representatives of the phylum Proteobacteria, which accounted for more than 50% of the total taxonomic diversity of the cultivated bacteria of the Vostok Bay. Phylums of Bacteroidetes, Firmicutes and Actinobacteria were also isolated. The taxonomic diversity of microbial community was represented by 15 genus. Based on the phenotypic characteristics, cultured heterotrophic bacteria was classified into the genera Rhodococcus sp., Micrococcus sp., Actynomycetes sp., Bacillus sp., Sarcina sp., Pseudomonas sp., Acinetobacter sp., Arthrobacter sp., Vibrio sp., Halomonas sp., Flavobacterium sp., Acetobacter sp., and Marinococcus sp., Pseudoalteromonas sp., Aeromonas sp., Staphylococcus sp. Sanitation-indicative bacteria in this bay were not identified, which indicates a slight anthropogenic impact. Thus bay Vostok was really insignificant recreational stress and it was reflected on marine microbial community.