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| Titel |
Hydroxy fatty acids in fresh snow samples from northern Japan: long-range atmospheric transport of Gram-negative bacteria by Asian winter monsoon |
| VerfasserIn |
P. Tyagi, S. Yamamoto, K. Kawamura |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 12, no. 23 ; Nr. 12, no. 23 (2015-12-08), S.7071-7080 |
| Datensatznummer |
250118200
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| Publikation (Nr.) |
 copernicus.org/bg-12-7071-2015.pdf |
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| Zusammenfassung |
| Hydroxy fatty acids (FAs) in fresh snow from Sapporo, one of the heaviest
snowfall regions in the world, have been studied to ascertain the airborne
bacterial endotoxin concentrations and their biomass. The presence of β-hydroxy FAs (C9–C28), constituents of the Gram-negative
bacterium (GNB), suggests long-range transport of soil microbes.
Likewise, the occurrence of α- and ω-hydroxy FAs
(C9–C30 and C9–C28, respectively) in snow reveals their
contribution from epicuticular waxes and soil microorganisms. Estimated
endotoxin and GNB mass can aid in assessing their possible impacts on the
diversity and functioning of aquatic and terrestrial ecosystems, as well as
lethal effects on pedestrians through dispersal of microbes. Air mass back
trajectories together with hydroxy FAs reveal their
sources from Siberia, the Russian Far East and northern China by the Asian
monsoon. This study highlights the role of fresh snow that reduces the human
health risk of GNB and endotoxin by the scavenging from air. |
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