Census of below-ground biota associated with permafrost affected soils of western Greenland, with a focus on trophic structure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F24%3A43908841" target="_blank" >RIV/60076658:12310/24:43908841 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1164556324000293?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1164556324000293?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ejsobi.2024.103623" target="_blank" >10.1016/j.ejsobi.2024.103623</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Census of below-ground biota associated with permafrost affected soils of western Greenland, with a focus on trophic structure

Popis výsledku v původním jazyce

Large amounts of terrestrial organic carbon (OC) are stored in Arctic permafrost-affected soils. Through processes of cryoturbation and solifluction, the subsoils can contain subducted topsoil material, which largely contribute to the large OC storage in these soils. While the bacterial, archaeal, and fungal communities in such soils have been studied to some degree, information about protists and meso- and macrofauna is scarce, although these groups might substantially contribute to OC processing, through e.g., food web interactions. Different organic and mineral horizons, including subducted topsoil material, of Arctic soils were investigated using a metatranscriptomics three-domain community profiling approach. Soil horizons were compared in regards to their total microbial community composition including all three domains of life. Furthermore, abundances of different pro- and eukaryotic micropredators were examined and a variety of functional groups involved in the carbon (C) and the nitrogen (N) cycle were analyzed in relation to specific taxonomic groups and abiotic soil parameters. Our study showed that RNA yields positively correlated with the OC content of the horizon and that the composition of the microbial community in subducted topsoil material rather matched that of mineral subsoils instead of organic top horizons. Horizon-resolved profiling revealed heterogeneity in the associated microbiomes and showed major differences in microbiomes of topsoil and subducted topsoil. The abundance of protist and nematode micropredators decreased in subducted topsoil, while predatory myxobacteria remained remarkably constant and comprised high proportions of the total communities in all horizons. Correlations analysis between functional guilds and biotic and abiotic parameters suggest a major impact of predatory myxobacteria on carbon and nitrogen cycles of subducted topsoils. The study adds urgently needed information about the total biota structure in permafrost soils and first insights into the associated soil microbial food webs.

Název v anglickém jazyce

Census of below-ground biota associated with permafrost affected soils of western Greenland, with a focus on trophic structure

Popis výsledku anglicky

Large amounts of terrestrial organic carbon (OC) are stored in Arctic permafrost-affected soils. Through processes of cryoturbation and solifluction, the subsoils can contain subducted topsoil material, which largely contribute to the large OC storage in these soils. While the bacterial, archaeal, and fungal communities in such soils have been studied to some degree, information about protists and meso- and macrofauna is scarce, although these groups might substantially contribute to OC processing, through e.g., food web interactions. Different organic and mineral horizons, including subducted topsoil material, of Arctic soils were investigated using a metatranscriptomics three-domain community profiling approach. Soil horizons were compared in regards to their total microbial community composition including all three domains of life. Furthermore, abundances of different pro- and eukaryotic micropredators were examined and a variety of functional groups involved in the carbon (C) and the nitrogen (N) cycle were analyzed in relation to specific taxonomic groups and abiotic soil parameters. Our study showed that RNA yields positively correlated with the OC content of the horizon and that the composition of the microbial community in subducted topsoil material rather matched that of mineral subsoils instead of organic top horizons. Horizon-resolved profiling revealed heterogeneity in the associated microbiomes and showed major differences in microbiomes of topsoil and subducted topsoil. The abundance of protist and nematode micropredators decreased in subducted topsoil, while predatory myxobacteria remained remarkably constant and comprised high proportions of the total communities in all horizons. Correlations analysis between functional guilds and biotic and abiotic parameters suggest a major impact of predatory myxobacteria on carbon and nitrogen cycles of subducted topsoils. The study adds urgently needed information about the total biota structure in permafrost soils and first insights into the associated soil microbial food webs.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40104 - Soil science

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

European Journal of Soil Biology

ISSN

1164-5563

e-ISSN

—

Svazek periodika

121

Číslo periodika v rámci svazku

JUN 2024

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

001242385600001

EID výsledku v databázi Scopus

2-s2.0-85193033042