المؤلفون: Cáliz J; Integrative Freshwater Ecology Group and LTER-Aigüestortes, Centre of Advanced Studies of Blanes, Spanish Council for Research (CSIC), E-17300 Blanes, Spain., Triadó-Margarit X; Integrative Freshwater Ecology Group and LTER-Aigüestortes, Centre of Advanced Studies of Blanes, Spanish Council for Research (CSIC), E-17300 Blanes, Spain., Camarero L; Integrative Freshwater Ecology Group and LTER-Aigüestortes, Centre of Advanced Studies of Blanes, Spanish Council for Research (CSIC), E-17300 Blanes, Spain., Casamayor EO; Integrative Freshwater Ecology Group and LTER-Aigüestortes, Centre of Advanced Studies of Blanes, Spanish Council for Research (CSIC), E-17300 Blanes, Spain casamayor@ceab.csic.es.

المصدر: Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2018 Nov 27; Vol. 115 (48), pp. 12229-12234. Date of Electronic Publication: 2018 Nov 12.

نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't

بيانات الدورية: Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: MEDLINE

مواضيع طبية MeSH: Air Microbiology* , Microbiota*, Archaea/*isolation & purification , Bacteria/*isolation & purification , Fungi/*isolation & purification, Aerosols/analysis ; Archaea/classification ; Archaea/genetics ; Atmosphere ; Bacteria/classification ; Bacteria/genetics ; Biodiversity ; Fungi/classification ; Fungi/genetics ; Phylogeny ; Seasons ; Spain

مستخلص: Airborne microbes (bacteria, archaea, protists, and fungi) were surveyed over a 7-y period via high-throughput massive sequencing of 16S and 18S rRNA genes in rain and snow samples collected fortnightly at a high-elevation mountain Long-Term Ecological Research (LTER) Network site (LTER-Aigüestortes, Central Pyrenees, Spain). This survey constitutes the most comprehensive mountain-top aerobiology study reported to date. The air mass origins were tracked through modeled back-trajectories and analysis of rain water chemical composition. Consistent microbial seasonal patterns were observed with highly divergent summer and winter communities recurrent in time. Indicative microbial taxa were unveiled as a forensic signature, and ubiquitous taxa were observed as common atmosphere inhabitants, highlighting aerosols as a potentially successful mechanism for global microbial dispersal. Source-tracking analyses identified freshwater, cropland, and urban biomes as the most important sources for airborne bacteria in summer, while marine and forest biomes prevailed in winter, in agreement with air mass retrotrajectories and the prevailing general and regional atmospheric circulation.
Competing Interests: The authors declare no conflict of interest.