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Heads in the clouds: marine viruses disperse bidirectionally along the natural water cycle
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. University of Duisburg-Essen, Germany. (Ctr Ecol & Evolut Microbial Model Syst EEMiS)ORCID iD: 0000-0002-2132-2709
University of Duisburg-Essen, Germany.
University of Duisburg-Essen, Germany.
Carl von Ossietzky University of Oldenburg, Germany.
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Abstract [en]

Marine viruses have thoroughly been studied in seawater, yet their dispersal from neuston ecosystems at the air-sea interface towards the atmosphere remains a knowledge gap. Here, we show that 6.2 % of the studied virus population were shared between air-sea interface ecosystems and rainwater. Virus enrichment in the 1-mm thin surface microlayer and sea foams happened selectively, and variant analysis proved virus transfer to aerosols and rain. Viruses detected in rain and aerosols showed a significantly higher percent G/C base content compared to marine viruses, and a genetically distinct rain virome supports that those viruses could inhabit higher air masses. CRISPR spacer matches of marine prokaryotes to foreign viruses from rainwater prove regular virus-host encounters at the air-sea interface. Our findings on aerosolization and long-range atmospheric dispersal implicate virus-mediated carbon turnover in remote areas, viral dispersal mechanisms relevant to human health, and involvement of viruses in atmospheric processes like ice-nucleation.

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Environmental Sciences Microbiology Ecology
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Natural Science, Environmental Science; Ecology, Microbiology
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URN: urn:nbn:se:lnu:diva-114817DOI: 10.1101/2022.06.21.497027OAI: oai:DiVA.org:lnu-114817DiVA, id: diva2:1676294
Available from: 2022-06-24 Created: 2022-06-24 Last updated: 2022-11-15Bibliographically approved

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Rahlff, Janina

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