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Seawater mesocosm experiments in the Arctic uncover differential transfer of marine bacteria to aerosols
Linnéuniversitetet, Institutionen för biologi och miljö (BOM).
Linnéuniversitetet, Institutionen för biologi och miljö (BOM).
Stockholm Univ, Sweden.
Linnéuniversitetet, Institutionen för biologi och miljö (BOM). (EcoChange)ORCID iD: 0000-0002-7120-4145
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2015 (English)In: Environmental Microbiology Reports, ISSN 1758-2229, E-ISSN 1758-2229, Vol. 7, no 3, p. 460-470Article in journal (Refereed) Published
Abstract [en]

Biogenic aerosols critically control atmospheric processes. However, although bacteria constitute major portions of living matter in seawater, bacterial aerosolization from oceanic surface layers remains poorly understood. We analysed bacterial diversity in seawater and experimentally generated aerosols from three Kongsfjorden sites, Svalbard. Construction of 16S rRNA gene clone libraries from paired seawater and aerosol samples resulted in 1294 sequences clustering into 149 bacterial and 34 phytoplankton operational taxonomic units (OTUs). Bacterial communities in aerosols differed greatly from correspondingseawater communities in three out of four experiments. Dominant populations of both seawater and aerosols were Flavobacteriia, Alphaproteobacteria and Gammaproteobacteria. Across the entire dataset, most OTUs from seawater could also be found in aerosols; in each experiment, however, several OTUs were either selectively enriched in aerosols or little aerosolized. Notably, a SAR11 clade OTU was consistently abundant in the seawater, but was recorded insignificantly lower proportions in aerosols. A strikingly high proportion of colony-forming bacteria were pigmented in aerosols compared with seawater, suggesting that selection during aerosolization contributes to explaining elevated proportions of pigmented bacteria frequently observed in atmospheric samples. Our findings imply that atmospheric processes could be considerably influenced by spatiotemporal variations in the aerosolization efficiency of different marine bacteria.

Place, publisher, year, edition, pages
2015. Vol. 7, no 3, p. 460-470
National Category
Microbiology
Research subject
Ecology, Aquatic Ecology
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URN: urn:nbn:se:umu:diva-139713DOI: 10.1111/1758-2229.12273ISI: 000354375100011PubMedID: 25682947OAI: oai:DiVA.org:umu-139713DiVA, id: diva2:1143035
Available from: 2015-05-29 Created: 2017-09-20 Last updated: 2018-06-09

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Lindh, Markus V.Pinhassi, Jarone

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