Abstract：
:Surface ocean bubble-bursting generates aerosols composed of microscopic salt-water droplets, enriched in marine organic matter. The organic fraction profoundly influences aerosols' properties, by scattering solar radiations and nucleating water particles. Still little is known on the biochemical and microbiological composition of these organic particles. In the present study, we experimentally simulated the bursting of bubbles at the seawater surface of the North-Eastern Atlantic Ocean, analysing the organic materials and the diversity of the bacteria in the source-seawaters and in the produced aerosols. We show that, compared with seawater, the sub-micron aerosol particles were highly enriched in organic matter (up to 140,000x for lipids, 120,000x for proteins and 100,000x for carbohydrates). Also DNA, viruses and prokaryotes were significantly enriched (up to 30,000, 250 and 45x, respectively). The relative importance of the organic components in the aerosol did not reflect those in the seawater, suggesting their selective transfer. Molecular analyses indicate the presence of selective transfers also for bacterial genotypes, highlighting higher contribution of less abundant seawater bacterial taxa to the marine aerosol. Overall, our results open new perspectives in the study of microbial dispersal through marine aerosol and provide new insights for a better understanding of climate-regulating processes of global relevance.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Rastelli E,Corinaldesi C,Dell'Anno A,Lo Martire M,Greco S,Cristina Facchini M,Rinaldi M,O'Dowd C,Ceburnis D,Danovaro Rdoi
10.1038/s41598-017-10563-zsubject
Has Abstractpub_date
2017-09-13 00:00:00pages
11475issue
1issn
2045-2322pii
10.1038/s41598-017-10563-zjournal_volume
7pub_type
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