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Community adaptatio...
Community adaptation to temperature explains abrupt soil bacterial community shift along a geothermal gradient on Iceland
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- Weedon, James T. (author)
- Vrije Universiteit Amsterdam
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- Bååth, Erland (author)
- Lund University,Lunds universitet,MEMEG,Biologiska institutionen,Naturvetenskapliga fakulteten,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Mikrobiologisk ekologi,Forskargrupper vid Lunds universitet,Department of Biology,Faculty of Science,Centre for Environmental and Climate Science (CEC),Microbial Ecology,Lund University Research Groups
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- Rijkers, Ruud (author)
- Vrije Universiteit Amsterdam
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- Reischke, Stephanie (author)
- Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Mikrobiologisk ekologi,Forskargrupper vid Lunds universitet,Department of Biology,Faculty of Science,Microbial Ecology,Lund University Research Groups
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- Sigurdsson, Bjarni D. (author)
- Agricultural University of Iceland
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- Oddsdottir, Edda (author)
- Icelandic Forest Research
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- van Hal, Jurgen (author)
- Vrije Universiteit Amsterdam
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- Aerts, Rien (author)
- Vrije Universiteit Amsterdam
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- Janssens, Ivan A. (author)
- University of Antwerp
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- van Bodegom, Peter M. (author)
- Leiden University
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(creator_code:org_t)
- Elsevier BV, 2023
- 2023
- English 11 s.
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In: Soil Biology and Biochemistry. - : Elsevier BV. - 0038-0717. ; 177
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Abstract
Subject headings
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- Understanding how and why soil microbial communities respond to temperature changes is important for understanding the drivers of microbial distribution and abundance. Studying soil microbe responses to warming is often made difficult by concurrent warming effects on soil and vegetation and by a limited number of warming levels preventing the detection of non-linear effects. A unique area in Iceland, where soil temperatures have recently increased due to geothermic activity, created a stable warming gradient in both grassland (dominated by Agrostis capillaris) and forest (Picea sitchensis) vegetation. By sampling soils which had been subjected to four years of temperature elevation (ambient (MAT 5.2 °C) to +40 °C), we investigated the shape of the response of soil bacterial communities to warming, and their associated community temperature adaptation. We used 16S rRNA amplicon sequencing to profile bacterial communities, and bacterial growth-based assays (3H-Leu incorporation) to characterize community adaptation using a temperature sensitivity index (SI, log (growth at 40 °C/4 °C)). Despite highly dissimilar bacterial community composition between the grassland and forest, they adapted similarly to warming. SI was 0.6 (equivalent to a minimum temperature for growth of between −6 and −7 °C) in both control plots. Both diversity and community composition, as well as SI, showed similar threshold dynamics along the soil temperature gradient. There were no significant changes up to soil warming of 6–9 °C above ambient, beyond which all indices shifted in parallel, with SI increasing from 0.6 to 1.5. The consistency of these responses provide evidence for an important role for temperature as a direct driver of bacterial community shifts along soil temperature gradients.
Subject headings
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Markvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Soil Science (hsv//eng)
Keyword
- Bacterial growth
- Geothermic gradient
- Soil bacterial community
- Temperature adaptation
- Threshold
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Weedon, James T.
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Bååth, Erland
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Rijkers, Ruud
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Reischke, Stepha ...
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Sigurdsson, Bjar ...
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Oddsdottir, Edda
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show more...
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van Hal, Jurgen
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Aerts, Rien
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Janssens, Ivan A ...
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van Bodegom, Pet ...
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- About the subject
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- AGRICULTURAL SCIENCES
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AGRICULTURAL SCI ...
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and Agriculture Fore ...
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and Soil Science
- Articles in the publication
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Soil Biology and ...
- By the university
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Lund University