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DIGITAL.CSIC
Article . 2023 . Peer-reviewed
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Marcadores moleculares subrogados a la repelencia al agua en suelos afectados por el fuego

Molecular markers surrogated to water repellency in fire-affected soils
Authors: Jiménez-Morillo, Nicasio T.; Almendros, Gonzalo; Guiomar, Nuno; Miller, Ana Z.; Barrocas-Dias, Cristina; de la Rosa, José M.; Hatcher, Patrick G.; +1 Authors

Marcadores moleculares subrogados a la repelencia al agua en suelos afectados por el fuego

Abstract

La repelencia al agua del suelo (RAS) se atribuye a la acumulación de compuestos hidrofóbicos (lípidos), pero su extracción no siempre elimina la RAS, lo que sugiere que componentes macromoleculares no extraíbles también pueden estar relacionados con una RAS. Se han estudiado suelos quemados (B) y control (UB) del Parque Nacional de Doñana (Huelva, España) bajo dos tipos de vegetación (alcornoque y brezo) y fracciones de suelo: gruesa (1–2 mm) y fina (<0.05 mm). La composición molecular de la materia orgánica del suelo (MOS) se analizó mediante espectrometría de masas de ultra-alta resolución. Además, se empleó la regresión por mínimos cuadrados parciales (PLS) para explorar la relación entre la RAS y la MOS definida por la abundancia de los 1221 compuestos orgánicos comunes. También se utilizaron índices para obtener gráficas que faciliten la identificación de biomarcadores de la RAS. En los suelos quemados, la RAS estaba significativamente relacionada (P<0.05) con compuestos aromáticos y condensados, mientras que, en los suelos control, la MOS incluía compuestos aromáticos y ligninas. En las fracciones finas, la RAS estuvo relacionada principalmente con lípidos, pero, no se encontró correlación en las fracciones gruesas. Los resultados permiten concluir que la hidrofobicidad depende de varias famílias de compuestos orgánicos. La combinación de la FT-ICR/MS con herramientas estadísticas ha facilitado la obtención de nuevos biomarcadores de RAS.

Trabajo parcialmente financiado por los proyectos EROFIRE (PCIF/RPG/0079/2018 y MICROCENO (PTDC/CTA-AMB/ 0608/2020) de la Fundação para a Ciência e a Tecnologia (FCT) y MarkFire (PAI-DI2020, PY20_01073) de la Junta de Andalucía con fondos EU FEDER e INTERCARBON (2017/19) del Espacio Natural de Doñana y la EBD-CSIC. Ade-más, NTJM y AZM agradecen los contratos CEECs (2021/00711/CEECIND y CEECIND/01147/2017, res-pectivamente, de la FCT) y el contrato Ramón y Cajal (ref. RYC2019-026885-I) del Ministerio de Ciencia e Innovación.

5 páginas.- 2 figuras.- 5 referencias.- Enlace al artículo https://revistas.rcaap.pt/rca/article/view/28639/21412

Peer reviewed

Countries
United States, Spain
Keywords

van Krevelen diagram, Incendios forestales, Mass spectrometry, Forest fires, Quimiometría, Hidrofobicidad, Hydrophobicity, Organic Chemistry, incendios forestales, espectrometría de masas, Diagrama de van Krevelen, diagrama de van Krevelen, Environmental Chemistry, Espectrometría de masas, Chemometrics, quimiometría

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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