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Microbial ecology in a future climate: effects of temperature and moisture on microbial communities of two boreal fens.

Identifieur interne : 001497 ( Main/Exploration ); précédent : 001496; suivant : 001498

Microbial ecology in a future climate: effects of temperature and moisture on microbial communities of two boreal fens.

Auteurs : Krista Peltoniemi [Finlande] ; Raija Laiho [Finlande] ; Heli Juottonen [Finlande] ; Oili Kiikkil [Finlande] ; P Ivi M Kiranta [Finlande] ; Kari Minkkinen [Finlande] ; Taina Pennanen [Finlande] ; Timo Penttil [Finlande] ; Tytti Sarjala [Finlande] ; Eeva-Stiina Tuittila [Finlande] ; Tero Tuomivirta [Finlande] ; Hannu Fritze [Finlande]

Source :

RBID : pubmed:26066028

Descripteurs français

English descriptors

Abstract

Impacts of warming with open-top chambers on microbial communities in wet conditions and in conditions resulting from moderate water-level drawdown (WLD) were studied across 0-50 cm depth in northern and southern boreal sedge fens. Warming alone decreased microbial biomass especially in the northern fen. Impact of warming on microbial PLFA and fungal ITS composition was more obvious in the northern fen and linked to moisture regime and sample depth. Fungal-specific PLFA increased in the surface peat in the drier regime and decreased in layers below 10 cm in the wet regime after warming. OTUs representing Tomentella and Lactarius were observed in drier regime and Mortierella in wet regime after warming in the northern fen. The ectomycorrhizal fungi responded only to WLD. Interestingly, warming together with WLD decreased archaeal 16S rRNA copy numbers in general, and fungal ITS copy numbers in the northern fen. Expectedly, many results indicated that microbial response on warming may be linked to the moisture regime. Results indicated that microbial community in the northern fen representing Arctic soils would be more sensitive to environmental changes. The response to future climate change clearly may vary even within a habitat type, exemplified here by boreal sedge fen.

DOI: 10.1093/femsec/fiv062
PubMed: 26066028


Affiliations:


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Le document en format XML

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<term>Arctic Regions (MeSH)</term>
<term>Basidiomycota (genetics)</term>
<term>Basidiomycota (physiology)</term>
<term>Climate Change (MeSH)</term>
<term>Ecosystem (MeSH)</term>
<term>Microbial Consortia (genetics)</term>
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<term>Mortierella (physiology)</term>
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<term>RNA, Ribosomal, 16S (genetics)</term>
<term>Soil (MeSH)</term>
<term>Soil Microbiology (MeSH)</term>
<term>Temperature (MeSH)</term>
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<term>Archéobactéries (physiologie)</term>
<term>Basidiomycota (génétique)</term>
<term>Basidiomycota (physiologie)</term>
<term>Changement climatique (MeSH)</term>
<term>Consortiums microbiens (génétique)</term>
<term>Consortiums microbiens (physiologie)</term>
<term>Microbiologie du sol (MeSH)</term>
<term>Mortierella (génétique)</term>
<term>Mortierella (physiologie)</term>
<term>Mycorhizes (génétique)</term>
<term>Régions arctiques (MeSH)</term>
<term>Sol (MeSH)</term>
<term>Température (MeSH)</term>
<term>Zones humides (MeSH)</term>
<term>Écosystème (MeSH)</term>
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<term>RNA, Ribosomal, 16S</term>
</keywords>
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<term>Archaea</term>
<term>Basidiomycota</term>
<term>Microbial Consortia</term>
<term>Mortierella</term>
<term>Mycorrhizae</term>
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<term>ARN ribosomique 16S</term>
<term>Archéobactéries</term>
<term>Basidiomycota</term>
<term>Consortiums microbiens</term>
<term>Mortierella</term>
<term>Mycorhizes</term>
</keywords>
<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr">
<term>Archéobactéries</term>
<term>Basidiomycota</term>
<term>Consortiums microbiens</term>
<term>Mortierella</term>
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<term>Basidiomycota</term>
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<term>Arctic Regions</term>
<term>Climate Change</term>
<term>Ecosystem</term>
<term>Soil</term>
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<term>Temperature</term>
<term>Wetlands</term>
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<term>Microbiologie du sol</term>
<term>Régions arctiques</term>
<term>Sol</term>
<term>Température</term>
<term>Zones humides</term>
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<div type="abstract" xml:lang="en">Impacts of warming with open-top chambers on microbial communities in wet conditions and in conditions resulting from moderate water-level drawdown (WLD) were studied across 0-50 cm depth in northern and southern boreal sedge fens. Warming alone decreased microbial biomass especially in the northern fen. Impact of warming on microbial PLFA and fungal ITS composition was more obvious in the northern fen and linked to moisture regime and sample depth. Fungal-specific PLFA increased in the surface peat in the drier regime and decreased in layers below 10 cm in the wet regime after warming. OTUs representing Tomentella and Lactarius were observed in drier regime and Mortierella in wet regime after warming in the northern fen. The ectomycorrhizal fungi responded only to WLD. Interestingly, warming together with WLD decreased archaeal 16S rRNA copy numbers in general, and fungal ITS copy numbers in the northern fen. Expectedly, many results indicated that microbial response on warming may be linked to the moisture regime. Results indicated that microbial community in the northern fen representing Arctic soils would be more sensitive to environmental changes. The response to future climate change clearly may vary even within a habitat type, exemplified here by boreal sedge fen.</div>
</front>
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<AbstractText>Impacts of warming with open-top chambers on microbial communities in wet conditions and in conditions resulting from moderate water-level drawdown (WLD) were studied across 0-50 cm depth in northern and southern boreal sedge fens. Warming alone decreased microbial biomass especially in the northern fen. Impact of warming on microbial PLFA and fungal ITS composition was more obvious in the northern fen and linked to moisture regime and sample depth. Fungal-specific PLFA increased in the surface peat in the drier regime and decreased in layers below 10 cm in the wet regime after warming. OTUs representing Tomentella and Lactarius were observed in drier regime and Mortierella in wet regime after warming in the northern fen. The ectomycorrhizal fungi responded only to WLD. Interestingly, warming together with WLD decreased archaeal 16S rRNA copy numbers in general, and fungal ITS copy numbers in the northern fen. Expectedly, many results indicated that microbial response on warming may be linked to the moisture regime. Results indicated that microbial community in the northern fen representing Arctic soils would be more sensitive to environmental changes. The response to future climate change clearly may vary even within a habitat type, exemplified here by boreal sedge fen.</AbstractText>
<CopyrightInformation>© FEMS 2015. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.</CopyrightInformation>
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