Impacts of Saharan dust intrusions on bacterial communities of the low troposphere



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González-Toril, Elena and Osuna, Osuna and Viúdez-Moreiras, Daniel and Navarro-Cid, Iván and Díaz del Toro, Silvia and Sor, Suthyvann and Bardera, Rafael and Puente-Sánchez, Fernando and Diego-Castilla, Graciela de and Aguilera, Ángeles (2020) Impacts of Saharan dust intrusions on bacterial communities of the low troposphere. Scientific Reports, 10 (6837). pp. 1-13. ISSN ESSN: 2045-2322

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We have analyzed the bacterial community of a large Saharan dust event in the Iberian Peninsula and, for the frst time, we ofer new insights regarding the bacterial distribution at diferent altitudes of the lower troposphere and the replacement of the microbial airborne structure as the dust event receeds. Samples from diferent open-air altitudes (surface, 100m and 3km), were obtained onboard the National Institute for Aerospace Technology (INTA) C-212 aircrafts. Samples were collected during dust and dust-free air masses as well two weeks after the dust event. Samples related in height or time scale seems to show more similar community composition patterns compared with unrelated samples. The most abundant bacterial species during the dust event, grouped in three diferent phyla: (a) Proteobacteria: Rhizobiales, Sphingomonadales, Rhodobacterales, (b) Actinobacteria: Geodermatophilaceae; (c) Firmicutes: Bacillaceae. Most of these taxa are well known for being extremely stress-resistant. After the dust intrusion, Rhizobium was the most abundant genus, (40–90% total sequences). Samples taken during the fights carried out 15 days after the dust event were much more similar to the dust event samples compared with the remaining samples. In this case, Brevundimonas, and Methylobacterium as well as Cupriavidus and Mesorizobium were the most abundant genera.

Item Type:Article
Uncontrolled Keywords:Saharan Dust; Bacterial communities; Trophosphere
Subjects:Medical sciences > Biology > Microbiology
ID Code:61329
Deposited On:06 Jul 2020 14:24
Last Modified:02 Jun 2021 07:20

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