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Interactions between Snow Chemistry, Mercury Inputs and Microbial Population Dynamics in an Arctic Snowpack

by Malandain, Cédric , Cecillon, Sébastien , Vogel, Timothy M. , Larose, Catherine , Ferrari, Christophe , Prestat, Emmanuel , Lyon, Delina , Berger, Sibel , Schneider, Dominique , Dommergue, Aurélien

in Arctic Regions / Arctic snow / Bacteria / Bioavailability / Chemistry / Cold / Communities / Community structure / Contamination / Dimethylmercury / DNA microarrays / Ecosystems / Electric power / Engineering Sciences / Environmental changes / Environmental Monitoring / Gene Dosage / Genes / Genomics / Hydrogen-Ion Concentration / Meltwater / Mercury / Mercury (metal) / Mercury - analysis / Mercury - chemistry / Metabolism / Methylmercury / Microbial Interactions / Microorganisms / Nitrogen - analysis / Nitrogen - chemistry / Nitrogen - metabolism / Ordination / Phylogeny / Polar environments / RNA, Ribosomal, 16S - chemistry / RNA, Ribosomal, 16S - genetics / rRNA 16S / Snow - chemistry / Snow - microbiology / Snowpack / Speciation / Structure-function relationships / Studies / Sulfur / Sulfur - analysis / Sulfur - chemistry / Sulfur - metabolism / Water Microbiology

2013

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Interactions between Snow Chemistry, Mercury Inputs and Microbial Population Dynamics in an Arctic Snowpack

2013

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Interactions between Snow Chemistry, Mercury Inputs and Microbial Population Dynamics in an Arctic Snowpack

2013

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Journal Article

Interactions between Snow Chemistry, Mercury Inputs and Microbial Population Dynamics in an Arctic Snowpack

Malandain, Cédric,

Cecillon, Sébastien,

Vogel, Timothy M.,

Larose, Catherine,

Ferrari, Christophe,

Prestat, Emmanuel,

Lyon, Delina,

Berger, Sibel,

Schneider, Dominique,

Dommergue, Aurélien

2013

Overview

We investigated the interactions between snowpack chemistry, mercury (Hg) contamination and microbial community structure and function in Arctic snow. Snowpack chemistry (inorganic and organic ions) including mercury (Hg) speciation was studied in samples collected during a two-month field study in a high Arctic site, Svalbard, Norway (79 °N). Shifts in microbial community structure were determined by using a 16S rRNA gene phylogenetic microarray. We linked snowpack and meltwater chemistry to changes in microbial community structure by using co-inertia analyses (CIA) and explored changes in community function due to Hg contamination by q-PCR quantification of Hg-resistance genes in metagenomic samples. Based on the CIA, chemical and microbial data were linked (p = 0.006) with bioavailable Hg (BioHg) and methylmercury (MeHg) contributing significantly to the ordination of samples. Mercury was shown to influence community function with increases in merA gene copy numbers at low BioHg levels. Our results show that snowpacks can be considered as dynamic habitats with microbial and chemical components responding rapidly to environmental changes.

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Publisher

Public Library of Science,Public Library of Science (PLoS)

Subject

/ Cold