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Título
Resistance of soil bacterial communities from montane heathland ecosystems in the Cantabrian mountains (NW Spain) to a gradient of experimental nitrogen deposition
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Science of The Total Environment
Datos de la obra
Fernández-Guisuraga, J. M., Ansola, G., Pinto, R., Marcos, E., Calvo, L., & Sáenz de Miera, L. E. (2024). Resistance of soil bacterial communities from montane heathland ecosystems in the Cantabrian mountains (NW Spain) to a gradient of experimental nitrogen deposition. Science of The Total Environment, 920, 171079. https://doi.org/10.1016/J.SCITOTENV.2024.171079
Editor
Elsevier
Fecha
2024
ISSN
0048-9697
Abstract
[EN] Elevated atmospheric nitrogen (N) deposition on terrestrial ecosystems has become one of the most important drivers of microbial diversity loss on a global scale, and has been reported to alter the soil function of nutrient-poor, montane Calluna vulgaris heathlands in the context of global change. In this work we analyze for the first time the shifts of bacterial communities in response to experimental addition of N in Calluna heathlands as a simulation of atmospheric deposition. Specifically, we evaluated the effects of five N addition treatments (0, 10, 20, and 50 kg N ha−1 yr−1 for 3-years; and 56 kg N ha−1 yr−1 for 10-years) on the resistance of soil bacterial communities as determined by changes in their composition and alpha and beta diversities. The study was conducted in montane Calluna heathlands at different development stages (young and mature phases) in the southern side of the Cantabrian Mountains (NW Spain). Our results evidenced a substantial increase of long-term (10-years) N inputs on soil extractable N-NH4+, particularly in young Calluna stands. The alpha diversity of soil bacterial communities in mature Calluna stands did not show a significant response to experimental N addition, whereas it was significantly higher under long-term chronic N addition (56 kg N ha−1 yr−1 for 10-years) in young Calluna stands. These bacterial community shifts are mainly attributable to a decrease in the dominance of Acidobacteria phylum, the most representative in montane Calluna ecosystems, in favor of copiotrophic taxa such as Actinobacteria or Proteobacteria phyla, favored under increased N availability. Future research should investigate what specific ecosystem functions performed by soil bacterial communities may be sensitive to increased nitrogen depositions, which may have substantial implications for the understanding of montane Calluna ecosystems' stability.
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ID proyecto
- info:eu-repo/grantAgreement/AEI/ Programa Estatal para Impulsar la Investigación Científico-Técnica y su Transferencia/ PID2022-139156OB-C21/ES/ SUSCEPTIBILIDAD Y VULNERABILIDAD DEL PAISAJE FRENTE A MEGAINCENDIOS SEVEROS EN EL EJE ATLANTICO-MEDITERRANEO:SOLUCIONES BASADAS EN LA NATURALEZA PARA UNA GESTION PROACTIVA
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