Microbial abundance and community structure in a melting alpine snowpack

Extremophiles : Life Under Extreme Conditions
Anna LazzaroJosef Zeyer

Abstract

Snowmelt is a crucial period for alpine soil ecosystems, as it is related to inputs of nutrients, particulate matter and microorganisms to the underlying soil. Although snow-inhabiting microbial communities represent an important inoculum for soils, they have thus far received little attention. The distribution and structure of these microorganisms in the snowpack may be linked to the physical properties of the snowpack at snowmelt. Snow samples were taken from snow profiles at four sites (1930-2519 m a.s.l.) in the catchment of the Tiefengletscher, Canton Uri, Switzerland. Microbial (Archaea, Bacteria and Fungi) communities were investigated through T-RFLP profiling of the 16S and 18S rRNA genes, respectively. In parallel, we assessed physical and chemical parameters relevant to the understanding of melting processes. Along the snow profiles, density increased with depth due to compaction, while other physico-chemical parameters, such as temperature and concentrations of DOC and soluble ions, remained in the same range (e.g. <2 mg DOC L(-1), 5-30 μg NH4 (+)-N L(-1)) in all samples at all sites. Along the snow profiles, no major change was observed either in cell abundance or in bacterial and fungal diversity. No Archaea could ...Continue Reading

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Citations

Jan 7, 2016·Frontiers in Microbiology·Marco MeolaJosef Zeyer
Dec 17, 2015·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·D A PearceM J Siegert
Dec 5, 2015·Frontiers in Microbiology·Anna LazzaroJosef Zeyer
Feb 21, 2019·Scientific Reports·Lorrie MaccarioCatherine Larose
Jul 9, 2017·Applied and Environmental Microbiology·Eleonora ChiriMartin H Schroth
Dec 31, 2020·MicrobiologyOpen·Margarita SmirnovaVolha Shapaval

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