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Soil microbes and their response to experimental warming over time: A meta-analysis of field studies
Responsible organisation
2017 (English)In: Soil Biology and Biochemistry, ISSN 0038-0717, E-ISSN 1879-3428, Vol. 107, no Supplement C, p. 32-40Article in journal (Refereed) Published
Abstract [en]

Abstract Numerous field studies have found changes in soil respiration and microbial abundance under experimental warming. Yet, it is uncertain whether the magnitude of these responses remains consistent over the long-term. We performed a meta-analysis on 25 field experiments to examine how warming effects on soil respiration, microbial biomass, and soil microbial C respond to the duration of warming. For each parameter, we hypothesized that effect sizes of warming would diminish as the duration of warming increased. In support of our hypothesis, warming initially increased soil respiration, but the magnitude of this effect declined significantly as warming progressed as evidenced by the two longest studies in our meta-analysis. In fact, after 10 years of warming, soil respiration in warmed treatments was similar to controls. In contrast, warming effect sizes for fungal biomass, bacterial biomass, and soil microbial C did not respond significantly to the duration of warming. Microbial acclimation, community shifts, adaptation, or reductions in labile C may have ameliorated warming effects on soil respiration in the long-term. Accordingly, long-term soil C losses might be smaller than those suggested by short-term warming studies.

Place, publisher, year, edition, pages
2017. Vol. 107, no Supplement C, p. 32-40
Keywords [en]
Meta-analysis, Field experimental warming, Soil microbes, Adaptation
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:polar:diva-3872DOI: 10.1016/j.soilbio.2016.12.026OAI: oai:DiVA.org:polar-3872DiVA, id: diva2:1161960
Available from: 2017-12-01 Created: 2017-12-01 Last updated: 2017-12-01

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  • apa
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  • de-DE
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  • nn-NB
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