Microbiome structure and functional potential in permafrost soils of the Western Canadian Arctic

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F21%3A43905402" target="_blank" >RIV/60076658:12310/21:43905402 - isvavai.cz</a>

Result on the web

<a href="https://academic.oup.com/femsec/article/97/3/fiab008/6102547?login=true" target="_blank" >https://academic.oup.com/femsec/article/97/3/fiab008/6102547?login=true</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/femsec/fiab008" target="_blank" >10.1093/femsec/fiab008</a>

Result language

angličtina

Original language name

Microbiome structure and functional potential in permafrost soils of the Western Canadian Arctic

Original language description

Substantial amounts of topsoil organic matter (OM) in Arctic Cryosols have been translocated by the process of cryoturbation into deeper soil horizons (cryoOM), reducing its decomposition. Recent Arctic warming deepens the Cryosols&apos; active layer, making more topsoil and cryoOM carbon accessible for microbial transformation. To quantify bacteria, archaea and selected microbial groups (methanogens - mcrA gene and diazotrophs - nifH gene) and to investigate bacterial and archaeal diversity, we collected 83 soil samples from four different soil horizons of three distinct tundra types located in Qikiqtaruk (Hershel Island, Western Canada). In general, the abundance of bacteria and diazotrophs decreased from topsoil to permafrost, but not for cryoOM. No such difference was observed for archaea and methanogens. CryoOM was enriched with oligotrophic (slow-growing microorganism) taxa capable of recalcitrant OM degradation. We found distinct microbial patterns in each tundra type: topsoil from wet-polygonal tundra had the lowest abundance of bacteria and diazotrophs, but the highest abundance of methanogens. Wet-polygonal tundra, therefore, represented a hotspot for methanogenesis. Oligotrophic and copiotrophic (fast-growing microorganism) genera of methanogens and diazotrophs were distinctly distributed in topsoil and cryoOM, resulting in different rates of nitrogen flux into these horizons affecting OM vulnerability and potential CO2 and CH4 release.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10606 - Microbiology

Project

<a href="/en/project/GC20-21259J" target="_blank" >GC20-21259J: CRYOVULCAN - Vulnerability of carbon in Cryosols – substrate-microorganisms-aggregate interactions</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

FEMS Microbiology Ecology

ISSN

0168-6496

e-ISSN

1574-6941

Volume of the periodical

97

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

nestrankovano

UT code for WoS article

000794342000001

EID of the result in the Scopus database

2-s2.0-85102909938