Community Variability of Bacteria in Alpine Snow (Mont Blanc) Containing Saharan Dust Deposition and Their Snow Colonisation Potential

被引:39
作者
Chuvochina, Maria S. [1 ,2 ]
Marie, Dominique [3 ]
Chevaillier, Servanne [4 ,5 ]
Petit, Jean-Robert [1 ]
Normand, Philippe [6 ]
Alekhina, Irina A. [1 ,2 ]
Bulat, Sergey A. [1 ,2 ]
机构
[1] Univ Grenoble 1, Lab Glaciol & Geophys Environm, LGGE CNRS, F-38402 St Martin Dheres, France
[2] Russian Acad Sci, Eukaryotes Genet Lab, Petersburg Nucl Phys Inst, Gatchina 188300, Russia
[3] CNRS, Equipe Procaryotes Photosynthet Marins, Stn Biol Roscoff, UMR 7144, F-29682 Roscoff, France
[4] Univ Paris Est Creteil, CNRS, LISA, UMR 7583, Creteil, France
[5] Univ Paris Diderot, Inst Pierre Simon Laplace, Creteil, France
[6] Univ Lyon 1, CNRS, Lab Ecol Microbienne, UMR 5557, F-69622 Villeurbanne, France
关键词
snow; bacterial community composition; Mont Blanc glacier; Saharan dust; 16S rRNA genes; HIGH-MOUNTAIN LAKE; ICE-CORE; AIRBORNE MICROORGANISMS; EAST ANTARCTICA; FRENCH ALPS; DESERT DUST; SP NOV; DIVERSITY; RADIATION; SOIL;
D O I
10.1264/jsme2.ME11116
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Microorganisms uplifted during dust storms survive long-range transport in the atmosphere and could colonize high-altitude snow. Bacterial communities in alpine snow on a Mont Blanc glacier, associated with four depositions of Saharan dust during the period 2006-2009, were studied using 16S rRNA gene sequencing and flow cytometry. Also, sand from the Tunisian Sahara, Saharan dust collected in Grenoble and Mont Blanc snow containing no Saharan dust (one sample of each) were analyzed. The bacterial community composition varied significantly in snow containing four dust depositions over a 3-year period. Out of 61 phylotypes recovered from dusty snow, only three phylotypes were detected in more than one sample. Overall, 15 phylotypes were recognized as potential snow colonizers. For snow samples, these phylotypes belonged to Actinobacteria, Proteobacteria and Cyanobacteria, while for Saharan sand/dust samples they belonged to Actinobacteria, Bacteroidetes, Deinococcus-Thermus and Proteobacteria. Thus, regardless of the time-scale, Saharan dust events can bring different microbiota with no common species set to alpine glaciers. This seems to be defined more by event peculiarities and aeolian transport conditions than by the bacterial load from the original dust source.
引用
收藏
页码:237 / 247
页数:11
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