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Long-term warming-induced trophic downgrading in the soil microbial food web

Permanent lenke
https://hdl.handle.net/10037/33293
DOI
https://doi.org/10.1016/j.soilbio.2023.109044
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article.pdf (765.4Kb)
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Dato
2023-05-01
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Dahl, Mathilde Borg; Söllinger, Andrea; Sigurðsson, Páll; Janssens, Ivan; Peñuelas, Josep; Sigurdsson, Bjarni D.; Richter, Andreas; Tveit, Alexander; Urich, Tim
Sammendrag
Climatic warming has been hypothesized to accelerate organic matter decomposition by soil microorganisms and thereby enhance carbon (C) release to the atmosphere. However, the long-term consequences of soil warming on belowground biota interactions are poorly understood. Here we investigate how geothermal warming by 6 °C for more than 50 years affects soil microbiota. Using metatranscriptomics we obtained comprehensive profiles of the prokaryotic, eukaryotic and viral players of the soil microbial food web. When compared to ambient soil temperature conditions, we found pronounced differences in taxa abundances within and between trophic modules of the soil food web. Specifically, we observed a ‘trophic downgrading’ at elevated temperature, with soil fauna decreasing in abundance, while predatory bacteria and viruses became relatively more abundant. We propose that the drivers for this shift are previously observed decreases in microbial biomass and soil organic carbon, and the increase in soil bulk density (decrease in soil porosity) at elevated temperature. We conclude that a trophic downgrading may have important implications for soil carbon sequestration and nutrient dynamics in a warming world.
Forlag
Elsevier
Sitering
Dahl, Söllinger, Sigurðsson, Janssens, Peñuelas, Sigurdsson, Richter, Tveit, Urich. Long-term warming-induced trophic downgrading in the soil microbial food web. Soil Biology and Biochemistry. 2023;181
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  • Artikler, rapporter og annet (arktisk og marin biologi) [1635]
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