Abstract
Marine bacteria, which are known as key drivers for marine biogeochemical cycles and Earth’s climate system, are mainly responsible for the decomposition of organic matter and production of climate-relevant gases (i.e., CO₂, N₂O, and CH₄). However, research is still required to fully understand the correlation between environmental variables and bacteria community composition. Marine bacteria living in the Marian Cove, where the inflow of freshwater has been rapidly increasing due to substantial glacial retreat, must be undergoing significant environmental changes. During the summer of 2018, we conducted a hydrographic survey to collect environmental variables and bacterial community composition data at three different layers (i.e., the seawater surface, middle, and bottom layers) from 15 stations. Of all the bacterial data, 17 different phylum level bacteria and 21 different class level bacteria were found and Proteobacteria occupy 50.3% at phylum level following Bacteroidetes. Gammaproteobacteria and Alphaproteobacteria, which belong to Proteobacteria, are the highest proportion at the class level. Gammaproteobacteria showed the highest relative abundance in all three seawater layers. The collection of environmental variables and bacterial composition data contributes to improving our understanding of the significant relationships between marine Antarctic regions and marine bacteria that lives in the Antarctic.
Highlights
The collection of environmental variables and bacterial composition data will help understand the correlation between environmental variables and bacterial community composition in the rapidly changing Antarctic marine environment
Environmental variables and bacterial data were collected at three different layers from 15 different stations in Marian Cove, Antarctica, in 2018
All bacterial sequence data were deposited in the National Center for Biotechnology Inforfollowed by Alphaproteobacteria (Supplementary Table S2)
Summary
The collection of environmental variables and bacterial composition data will help understand the correlation between environmental variables and bacterial community composition in the rapidly changing Antarctic marine environment. Environmental variables and bacterial data were collected at three different layers (seawater surface, middle, and bottom layers) from 15 different stations in Marian Cove, Antarctica, in 2018. Relative abundance (%) was calculated with an operational taxonomic unit (OTU) count number of each sample. 8,022,571 OTUs were detected, and Gammaproteobacteria had the highest relative abundance in each seawater surface, middle, and the bottom layer at all 15 stations, published maps and institutional affiliations. 8,022,571 OTUs were detected, and Gammaproteobacte of 5 ria had the highest relative abundance in each seawater surface, middle, and the bottom layer at all 15 stations, followed by Alphaproteobacteria (Supplementary Table S2). All bacterial sequence data were deposited in the National Center for Biotechnology Inforfollowed by Alphaproteobacteria (Supplementary Table S2). Were deposited in the National Center for Biotechnology Information (NCBI)
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