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Site-specific responses of fungal and bacterial abundances to experimental warming in litter and soil across arctic and alpine tundra

Hallin, Sara and Jeanbille, Mathilde and Engelbrecht Clemmensen, Karina and Juhanson, Jaanis and Michelsen, Anders and Cooper, Elisabeth J. and Henry, Greg H.R. and Hofgaard, Annika and Hollister, Robert D. and Jónsdóttir, Ingibjörg S. and Klanderud, Kari and Tolvanen, Anne (2021). Site-specific responses of fungal and bacterial abundances to experimental warming in litter and soil across arctic and alpine tundra. Arctic science
[Research article]

Full text not available from this repository.

Abstract

Vegetation change of the Arctic tundra due to global warming is a well-known process, but the implication for the belowground microbial communities, key in nutrient cycling and decomposition, is poorly understood. We characterized the fungal and bacterial abundances in litter and soil layers across 16 warming experimental sites at 12 circumpolar locations. We investigated the relationship between microbial abundances and nitrogen (N) and carbon (C) isotopic signatures, indicating shifts in microbial processes with warming. Microbial abundances were 2–3 orders of magnitude larger in litter than in soil. Local, site-dependent responses of microbial abundances were variable, and no general effect of warming was detected. The only generalizable trend across sites was a dependence between the warming response ratios and C:N ratio in controls, highlighting a legacy of the vegetation on the microbial response to warming. We detected a positive effect of warming on the litter mass and δ15N, which was linked to bacterial abundance under warmed conditions. This effect was stronger in experimental sites dominated by deciduous shrubs, suggesting an altered bacterial N-cycling with increased temperatures, mediated by the vegetation, and with possible consequences on ecosystem feedbacks to climate change.

Authors/Creators:Hallin, Sara and Jeanbille, Mathilde and Engelbrecht Clemmensen, Karina and Juhanson, Jaanis and Michelsen, Anders and Cooper, Elisabeth J. and Henry, Greg H.R. and Hofgaard, Annika and Hollister, Robert D. and Jónsdóttir, Ingibjörg S. and Klanderud, Kari and Tolvanen, Anne
Title:Site-specific responses of fungal and bacterial abundances to experimental warming in litter and soil across arctic and alpine tundra
Series Name/Journal:Arctic science
Year of publishing :2021
Number of Pages:14
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:None
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
Keywords:tundra, warming, litter, soil, microbial abundance, stable isotopes
URN:NBN:urn:nbn:se:slu:epsilon-p-115606
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-115606
Additional ID:
Type of IDID
DOI10.1139/as-2020-0053
ID Code:26851
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology
Deposited By: SLUpub Connector
Deposited On:28 Jan 2022 13:25
Metadata Last Modified:28 Jan 2022 13:31

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