2024-03-28T13:03:54Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/136122020-05-18T11:43:44Zcom_10261_88com_10261_8col_10261_341
DIGITAL.CSIC
author
Hervàs, Anna
author
Camarero, Lluís
author
Reche, Isabel
author
Casamayor, Emilio O.
2009-06-12T09:36:47Z
2009-06-12T09:36:47Z
2009-04-29
Environmental Microbiology 11(6): 1612-1623 (2009)
1462-2912
http://hdl.handle.net/10261/13612
10.1111/j.1462-2920.2009.01926.x
We have analysed the diversity of the bacteria, which grow after addition of concentrated airborne particles and desert dust in different microcosms combinations with water samples from oligotrophic alpine lakes. We used, on the one hand, airborne bacteria transported by an African dust plume and collected in a high mountain area in the central Pyrenees (Spain). On the other hand, we collected desert dust in Mauritania (c. 3000 km distance, and a few days estimated airborne journey), a known source region for dust storms in West Africa, which originates many of the dust plumes landing on Europe. In all the dust-amended treatments we consistently observed bacterial growth of common phyla usually found in freshwater ecosystems, i.e. Alpha-, Beta- and Gammaproteobacteria, Actinobacteria, and a few Bacteroidetes, but with different composition based on lake water pretreatment and dust type. Overall, we tentatively split the bacterial community in (i) typical freshwater non-airborne bacteria, (ii) cosmopolitan long-distance airborne bacteria, (iii) non-freshwater low-distance airborne bacteria, (iv) non-freshwater long-distance airborne soil bacteria and (v) freshwater non-soil airborne bacteria. We identified viable long-distance airborne bacteria as immigrants in alpine lakes (e.g. Sphingomonas-like) but also viable putative airborne pathogens with the potential to grow in remote alpine areas (Acinetobacter-like and Arthrobacter-like). Generation of atmospheric aerosols and remote dust deposition is a global process, largely enhanced by perturbations linked to the global change, and high mountain lakes are very convenient worldwide model systems for monitoring global-scale bacterial dispersion and pathogens entries in remote pristine environments.
eng
closedAccess
Viability and potential for immigration of airborne bacteria from Africa that reach high mountain lakes in Europe
artículo
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URL
https://digital.csic.es/bitstream/10261/13612/5/Airborne_bacteria_Press_release.pdf.txt
File
MD5
966c6add09ec6f34a2f70b7aaff16913
5945
text/plain
Airborne_bacteria_Press_release.pdf.txt