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Impact of future scenarios of climate change on lignin dynamics in soil: A case study in a Mediterranean savannah.
San-Emeterio, L M; Hidalgo-Galvez, M D; de la Rosa, J M; Pérez-Ramos, I; González-Pérez, J A.
Afiliación
  • San-Emeterio LM; Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Cientificas (IRNAS-CSIC), Av. Reina Mercedes 10, 41012 Sevilla, Spain; Department of Soil and Environment, Swedish University of Agricultural Sciences (SLU), Lenmart Hjelms Väg 9, P. O. Box 7014, 75007 Upp
  • Hidalgo-Galvez MD; University of Seville, 41012 Seville, Spain; Department of Ecology, Faculty of Sciences II, University of Alicante, 03690 San Vicente del Raspeig, Alicante, Spain.
  • de la Rosa JM; Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Cientificas (IRNAS-CSIC), Av. Reina Mercedes 10, 41012 Sevilla, Spain.
  • Pérez-Ramos I; Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Cientificas (IRNAS-CSIC), Av. Reina Mercedes 10, 41012 Sevilla, Spain.
  • González-Pérez JA; Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Cientificas (IRNAS-CSIC), Av. Reina Mercedes 10, 41012 Sevilla, Spain.
Sci Total Environ ; 946: 174317, 2024 Oct 10.
Article en En | MEDLINE | ID: mdl-38960189
ABSTRACT
Lignin is an abundant and recalcitrant biopolymer of major relevance as soil organic matter (SOM) component playing a significant role in its stabilization. In this work, a factorial field experiment was established, where three climatic treatments (W, warming; D, drought; W + D, warming + drought), mimicking future climate change scenarios were installed over five years in a Mediterranean savannah "dehesa", accounting for its landscape diversity (under the tree canopy and in open grassland). A combination of analytical pyrolysis (Py-GC/MS) and the study of biogeochemical proxies based on lignin monomers is used for the direct detection of lignin-derived phenols and to infer possible shifts in lignin dynamics in soil. A total of 27 main lignin-derived methoxyphenols were identified, exhibiting different patterns and proportions, mainly driven by the effect of habitat, hence biomass inputs to SOM. An accelerated decomposition of lignin moieties -(exhibited by higher LG/LS and Al/K + Ac ratios)- is particularly exacerbated by the effect of all climatic treatments. There is also an overall effect on increasing lignin oxidation of side chain in syringyl units, especially under the tree canopy due to the alteration in biomass degradation and potential stimulation of enzyme activities. Conversely, in open grassland these effects are slower since the microbial community is expected to be already adapted to harsher conditions. Our findings suggests that climate change-related temperature and soil moisture deviations impact soil lignin decomposition in dehesas threatening this productive Mediterranean agroecosystem and affecting the mechanism of soil carbon storage.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos