Polar front associated variation in prokaryotic community structure in Arctic shelf seafloor
Spatial variations in composition of marine microbial communities and its causes have largely been disclosed in studies comprising rather large environmental and spatial differences. In the present study, we explored if a moderate but temporally permanent climatic division within a contiguous arctic...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2015-01-01
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| Series: | Frontiers in Microbiology |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fmicb.2015.00017/full |
| _version_ | 1798046346321592320 |
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| author | Tan Thi Nguyen Bjarne eLandfald |
| author_facet | Tan Thi Nguyen Bjarne eLandfald |
| author_sort | Tan Thi Nguyen |
| collection | DOAJ |
| description | Spatial variations in composition of marine microbial communities and its causes have largely been disclosed in studies comprising rather large environmental and spatial differences. In the present study, we explored if a moderate but temporally permanent climatic division within a contiguous arctic shelf seafloor was traceable in the diversity patterns of its bacterial and archaeal communities. Soft bottom sediment samples were collected at ten geographical locations, spanning spatial distances of up to 640 km, transecting the oceanic polar front in the Barents Sea. The northern sampling sites were generally colder, less saline, shallower, and showed higher concentrations of freshly sedimented phytopigments compared to the southern study locations. Sampling sites depicted low variation in relative abundances of taxa at class level, with persistent numerical dominance by lineages of Gamma- and Deltaproteobacteria (57-66% of bacterial sequence reads). The Archaea, which constituted 0.7-1.8% of 16S rRNA gene copy numbers in the sediment, were overwhelmingly (85.8%) affiliated with the Thaumarchaeota. Beta-diversity analyses showed the environmental variations throughout the sampling range to have a stronger impact on the structuring of both the bacterial and archaeal communities than spatial effects. While bacterial communities were significantly influenced by the combined effect of several weakly selective environmental differences, including temperature, archaeal communities appeared to be more uniquely structured by the level of freshly sedimented phytopigments. |
| first_indexed | 2024-04-11T23:37:11Z |
| format | Article |
| id | doaj.art-d18e24ffcd9a47c78146d96f1afa8ada |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-04-11T23:37:11Z |
| publishDate | 2015-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-d18e24ffcd9a47c78146d96f1afa8ada2022-12-22T03:56:56ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2015-01-01610.3389/fmicb.2015.00017116706Polar front associated variation in prokaryotic community structure in Arctic shelf seafloorTan Thi Nguyen0Bjarne eLandfald1UiT The Arctic University of NorwayUiT The Arctic University of NorwaySpatial variations in composition of marine microbial communities and its causes have largely been disclosed in studies comprising rather large environmental and spatial differences. In the present study, we explored if a moderate but temporally permanent climatic division within a contiguous arctic shelf seafloor was traceable in the diversity patterns of its bacterial and archaeal communities. Soft bottom sediment samples were collected at ten geographical locations, spanning spatial distances of up to 640 km, transecting the oceanic polar front in the Barents Sea. The northern sampling sites were generally colder, less saline, shallower, and showed higher concentrations of freshly sedimented phytopigments compared to the southern study locations. Sampling sites depicted low variation in relative abundances of taxa at class level, with persistent numerical dominance by lineages of Gamma- and Deltaproteobacteria (57-66% of bacterial sequence reads). The Archaea, which constituted 0.7-1.8% of 16S rRNA gene copy numbers in the sediment, were overwhelmingly (85.8%) affiliated with the Thaumarchaeota. Beta-diversity analyses showed the environmental variations throughout the sampling range to have a stronger impact on the structuring of both the bacterial and archaeal communities than spatial effects. While bacterial communities were significantly influenced by the combined effect of several weakly selective environmental differences, including temperature, archaeal communities appeared to be more uniquely structured by the level of freshly sedimented phytopigments.http://journal.frontiersin.org/Journal/10.3389/fmicb.2015.00017/fullArchaeaBacteriasediment16S rRNA gene sequencingbeta-diversityBarents Sea |
| spellingShingle | Tan Thi Nguyen Bjarne eLandfald Polar front associated variation in prokaryotic community structure in Arctic shelf seafloor Frontiers in Microbiology Archaea Bacteria sediment 16S rRNA gene sequencing beta-diversity Barents Sea |
| title | Polar front associated variation in prokaryotic community structure in Arctic shelf seafloor |
| title_full | Polar front associated variation in prokaryotic community structure in Arctic shelf seafloor |
| title_fullStr | Polar front associated variation in prokaryotic community structure in Arctic shelf seafloor |
| title_full_unstemmed | Polar front associated variation in prokaryotic community structure in Arctic shelf seafloor |
| title_short | Polar front associated variation in prokaryotic community structure in Arctic shelf seafloor |
| title_sort | polar front associated variation in prokaryotic community structure in arctic shelf seafloor |
| topic | Archaea Bacteria sediment 16S rRNA gene sequencing beta-diversity Barents Sea |
| url | http://journal.frontiersin.org/Journal/10.3389/fmicb.2015.00017/full |
| work_keys_str_mv | AT tanthinguyen polarfrontassociatedvariationinprokaryoticcommunitystructureinarcticshelfseafloor AT bjarneelandfald polarfrontassociatedvariationinprokaryoticcommunitystructureinarcticshelfseafloor |