A hotspot for cold crenarchaeota in the neuston of high mountain lakes

Environmental Microbiology
Jean-Christophe Auguet, Emilio O Casamayor

Abstract

We have surveyed the first 1 m of 10 oligotrophic high mountain lakes in the Central Pyrenees (Spain) for both abundance and predominant phylotypes richness of the archaeaplankton assemblage, using CARD-FISH and 16S rRNA gene sequencing respectively. Archaea inhabiting the air-water surface microlayer (neuston) ranged between 3% and 37% of total 4,6-diamidino-2-phenylindole (DAPI) counts and were mainly Crenarchaeota of a new freshwater cluster distantly related to the Marine Group 1.1a. Conversely, most of the Archaea from the underlying waters (the remaining first 1 m integrated) were mainly Euryarchaeota of three distantly related branches ranging between 0.4% and 27% of total DAPI counts. Therefore, a consistent qualitative and quantitative spatial segregation was observed for the two main archaeal phyla between neuston and underlying waters at a regional scale. We also observed a consistent pattern along the lakes surveyed between lake area, lake depth and water residence time, and the archaeal enrichment in the neuston: the larger the lake the higher the proportion of archaea in the neuston as compared with abundances from the underlying waters (n = 10 lakes; R(2) > 0.80; P < 0.001, in all three cases). This is the first ...Continue Reading

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Citations

Oct 16, 2009·Applied Microbiology and Biotechnology·Pilar JunierJohannes F Imhoff
Oct 23, 2009·The ISME Journal·Jean-Christophe AuguetEmilio O Casamayor
Mar 29, 2013·Proceedings of the National Academy of Sciences of the United States of America·Mylène HugoniPierre E Galand
Apr 12, 2011·Applied and Environmental Microbiology·Christian StolleKlaus Jürgens
Jan 18, 2011·Applied and Environmental Microbiology·Jean-Christophe AuguetEmilio O Casamayor
Sep 29, 2009·Applied and Environmental Microbiology·Michael CunliffeJ Colin Murrell
Apr 17, 2013·Canadian Journal of Microbiology·Marcelo N V OliveiraArnaldo C Borges
Oct 12, 2012·PloS One·Antoni Fernàndez-Guerra, Emilio O Casamayor
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Mar 15, 2011·Molecular Ecology·Albert BarberánEmilio O Casamayor
Oct 3, 2012·Evolution; International Journal of Organic Evolution·Maria J UrizEmilio O Casamayor
Dec 5, 2014·Environmental Microbiology Reports·Mylène HugoniIsabelle Mary
Nov 20, 2013·Environmental Microbiology Reports·Claudia X Restrepo-Ortiz, Emilio O Casamayor
Mar 24, 2016·Antonie van Leeuwenhoek·Christoph ReitschulerPaul Illmer
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Jun 10, 2010·FEMS Microbiology Ecology·Paul HörtnaglRuben Sommaruga
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Nov 19, 2011·FEMS Microbiology Letters·Stephanie N MerbtJames I Prosser
May 3, 2014·The Science of the Total Environment·Albert BarberánEmilio O Casamayor

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