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Página principal > Artículos > Artículos publicados > Long-term warming-induced trophic downgrading in the soil microbial food web |
Fecha: | 2023 |
Resumen: | 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. |
Ayudas: | European Commission 606895 Agencia Estatal de Investigación TED2021-132627B-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-1333 |
Nota: | Altres ajuts: the Fundación Ramón Areces grant CIVP20A6621. |
Derechos: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió acceptada per publicar |
Materia: | Climate change ; Global warming ; Grassland ; Microbial food web ; Soil ecology ; Trophic interactions |
Publicado en: | Soil biology and biochemistry, Vol. 181 (June 2023) , art. 109044, ISSN 0038-0717 |
Disponible a partir de: 2025-06-30 Postprint |