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The activity and functions of soil microbial communities in the Finnish sub-Arctic vary across vegetation types

Due to climate change, increased microbial activity in high-latitude soils may lead to higher greenhouse gas (GHG) emissions. However, microbial GHG production and consumption mechanisms in tundra soils are not thoroughly understood. To investigate how the diversity and functional potential of bacte...

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Autores principales: Viitamäki, Sirja, Pessi, Igor S, Virkkala, Anna-Maria, Niittynen, Pekka, Kemppinen, Julia, Eronen-Rasimus, Eeva, Luoto, Miska, Hultman, Jenni
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9341781/
https://www.ncbi.nlm.nih.gov/pubmed/35776963
http://dx.doi.org/10.1093/femsec/fiac079
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author Viitamäki, Sirja
Pessi, Igor S
Virkkala, Anna-Maria
Niittynen, Pekka
Kemppinen, Julia
Eronen-Rasimus, Eeva
Luoto, Miska
Hultman, Jenni
author_facet Viitamäki, Sirja
Pessi, Igor S
Virkkala, Anna-Maria
Niittynen, Pekka
Kemppinen, Julia
Eronen-Rasimus, Eeva
Luoto, Miska
Hultman, Jenni
author_sort Viitamäki, Sirja
collection PubMed
description Due to climate change, increased microbial activity in high-latitude soils may lead to higher greenhouse gas (GHG) emissions. However, microbial GHG production and consumption mechanisms in tundra soils are not thoroughly understood. To investigate how the diversity and functional potential of bacterial and archaeal communities vary across vegetation types and soil layers, we analyzed 116 soil metatranscriptomes from 73 sites in the Finnish sub-Arctic. Meadow soils were characterized by higher pH and lower soil organic matter (SOM) and carbon/nitrogen ratio. By contrast, dwarf shrub-dominated ecosystems had higher SOM and lower pH. Although Actinobacteria, Acidobacteria, Alphaproteobacteria and Planctomycetes were dominant in all communities, there were significant differences at the genus level between vegetation types; plant polymer-degrading groups were more active in shrub-dominated soils than in meadows. Given that climate-change scenarios predict the expansion of shrubs at high latitudes, our results indicate that tundra soil microbial communities harbor potential decomposers of increased plant litter, which may affect the rate of carbon turnover in tundra soils. Additionally, transcripts of methanotrophs were detected in the mineral layer of all soils, which may moderate methane fluxes. This study provides new insights into possible shifts in tundra microbial diversity and activity due to climate change.
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spelling pubmed-93417812022-08-01 The activity and functions of soil microbial communities in the Finnish sub-Arctic vary across vegetation types Viitamäki, Sirja Pessi, Igor S Virkkala, Anna-Maria Niittynen, Pekka Kemppinen, Julia Eronen-Rasimus, Eeva Luoto, Miska Hultman, Jenni FEMS Microbiol Ecol Research Article Due to climate change, increased microbial activity in high-latitude soils may lead to higher greenhouse gas (GHG) emissions. However, microbial GHG production and consumption mechanisms in tundra soils are not thoroughly understood. To investigate how the diversity and functional potential of bacterial and archaeal communities vary across vegetation types and soil layers, we analyzed 116 soil metatranscriptomes from 73 sites in the Finnish sub-Arctic. Meadow soils were characterized by higher pH and lower soil organic matter (SOM) and carbon/nitrogen ratio. By contrast, dwarf shrub-dominated ecosystems had higher SOM and lower pH. Although Actinobacteria, Acidobacteria, Alphaproteobacteria and Planctomycetes were dominant in all communities, there were significant differences at the genus level between vegetation types; plant polymer-degrading groups were more active in shrub-dominated soils than in meadows. Given that climate-change scenarios predict the expansion of shrubs at high latitudes, our results indicate that tundra soil microbial communities harbor potential decomposers of increased plant litter, which may affect the rate of carbon turnover in tundra soils. Additionally, transcripts of methanotrophs were detected in the mineral layer of all soils, which may moderate methane fluxes. This study provides new insights into possible shifts in tundra microbial diversity and activity due to climate change. Oxford University Press 2022-07-01 /pmc/articles/PMC9341781/ /pubmed/35776963 http://dx.doi.org/10.1093/femsec/fiac079 Text en © The Author(s) 2022. Published by Oxford University Press on behalf of FEMS. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Viitamäki, Sirja
Pessi, Igor S
Virkkala, Anna-Maria
Niittynen, Pekka
Kemppinen, Julia
Eronen-Rasimus, Eeva
Luoto, Miska
Hultman, Jenni
The activity and functions of soil microbial communities in the Finnish sub-Arctic vary across vegetation types
title The activity and functions of soil microbial communities in the Finnish sub-Arctic vary across vegetation types
title_full The activity and functions of soil microbial communities in the Finnish sub-Arctic vary across vegetation types
title_fullStr The activity and functions of soil microbial communities in the Finnish sub-Arctic vary across vegetation types
title_full_unstemmed The activity and functions of soil microbial communities in the Finnish sub-Arctic vary across vegetation types
title_short The activity and functions of soil microbial communities in the Finnish sub-Arctic vary across vegetation types
title_sort activity and functions of soil microbial communities in the finnish sub-arctic vary across vegetation types
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9341781/
https://www.ncbi.nlm.nih.gov/pubmed/35776963
http://dx.doi.org/10.1093/femsec/fiac079
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