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Phylogenetic Signals of Salinity and Season in Bacterial Community Composition Across the Salinity Gradient of the Baltic Sea
KTH, School of Biotechnology (BIO), Gene Technology. KTH, Centres, Science for Life Laboratory, SciLifeLab.ORCID iD: 0000-0002-3627-6899
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2016 (English)In: Frontiers in Microbiology, ISSN 1664-302X, E-ISSN 1664-302X, Vol. 7, 1883Article in journal (Refereed) Published
Abstract [en]

Understanding the key processes that control bacterial community composition has enabled predictions of bacterial distribution and function within ecosystems. In this study, we used the Baltic Sea as a model system to quantify the phylogenetic signal of salinity and season with respect to bacterioplankton community composition. The abundances of 16S rRNA gene amplicon sequencing reads were analyzed from samples obtained from similar geographic locations in July and February along a brackish to marine salinity gradient in the Baltic Sea. While there was no distinct pattern of bacterial richness at different salinities, the number of bacterial phylotypes in winter was significantly higher than in summer. Bacterial community composition in brackish vs. marine conditions, and in July vs. February was significantly different. Non-metric multidimensional scaling showed that bacterial community composition was primarily separated according to salinity and secondly according to seasonal differences at all taxonomic ranks tested. Similarly, quantitative phylogenetic clustering implicated a phylogenetic signal for both salinity and seasonality. Our results suggest that global patterns of bacterial community composition with respect to salinity and season are the result of phylogenetically clustered ecological preferences with stronger imprints from salinity.

Place, publisher, year, edition, pages
Frontiers Media , 2016. Vol. 7, 1883
Keyword [en]
ecological coherence, brackish microbiology, estuarine ecology, Verrucomicrobia, SAR11, microbial ecology
National Category
Microbiology
Identifiers
URN: urn:nbn:se:kth:diva-198878DOI: 10.3389/fmicb.2016.01883ISI: 000388761400001ScopusID: 2-s2.0-85006830365OAI: oai:DiVA.org:kth-198878DiVA: diva2:1062039
Funder
Science for Life Laboratory - a national resource center for high-throughput molecular bioscienceSwedish Research Council, 2011-5689
Note

QC 20170104

Available from: 2017-01-04 Created: 2016-12-22 Last updated: 2017-01-04Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
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  • de-DE
  • en-GB
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  • fi-FI
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  • nn-NB
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Output format
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