Interactions between beech and oak seedlings can modify the effects of hotter droughts and the onset of hydraulic failure
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Título: | Interactions between beech and oak seedlings can modify the effects of hotter droughts and the onset of hydraulic failure |
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Autor/es: | Mas, Eugénie | Cochard, Hervé | Deluigi, Janisse | Didion-Gency, Margaux | Martin-StPaul, Nicolas | Morcillo Juliá, Luna | Valladares Ros, Fernando | Vilagrosa, Alberto | Grossiord, Charlotte |
Grupo/s de investigación o GITE: | Gestión de Ecosistemas y de la Biodiversidad (GEB) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ecología | CEAM (Centro Estudios Ambientales del Mediterráneo) |
Palabras clave: | Functional diversity | Hydraulic failure | Hydraulic safety margins | Stomatal conductance | SurEau | Turgor loss point |
Fecha de publicación: | 28-oct-2023 |
Editor: | Wiley | New Phytologist Foundation |
Cita bibliográfica: | New Phytologist. 2024, 241(3): 1021-1034. https://doi.org/10.1111/nph.19358 |
Resumen: | · Mixing species with contrasting resource use strategies could reduce forest vulnerability to extreme events. Yet, how species diversity affects seedling hydraulic responses to heat and drought, including mortality risk, is largely unknown. · Using open-top chambers, we assessed how, over several years, species interactions (monocultures vs mixtures) modulate heat and drought impacts on the hydraulic traits of juvenile European beech and pubescent oak. Using modeling, we estimated species interaction effects on timing to drought-induced mortality and the underlying mechanisms driving these impacts. · We show that mixtures mitigate adverse heat and drought impacts for oak (less negative leaf water potential, higher stomatal conductance, and delayed stomatal closure) but enhance them for beech (lower water potential and stomatal conductance, narrower leaf safety margins, faster tree mortality). Potential underlying mechanisms include oak's larger canopy and higher transpiration, allowing for quicker exhaustion of soil water in mixtures. · Our findings highlight that diversity has the potential to alter the effects of extreme events, which would ensure that some species persist even if others remain sensitive. Among the many processes driving diversity effects, differences in canopy size and transpiration associated with the stomatal regulation strategy seem the primary mechanisms driving mortality vulnerability in mixed seedling plantations. |
Patrocinador/es: | EM, JD, MD-G, and CG were supported by the Swiss National Science Foundation (310030_204697) and the Sandoz Family Foundation. AV thanks Generalitat Valenciana for the grant CIBEST 2021/005 and INERTIA project (PID2019-111332RB-C22). CEAM is funded by Generalitat Valenciana. |
URI: | http://hdl.handle.net/10045/138173 |
ISSN: | 0028-646X (Print) | 1469-8137 (Online) |
DOI: | 10.1111/nph.19358 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1111/nph.19358 |
Aparece en las colecciones: | INV - GEB - Artículos de Revistas |
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Mas_etal_2024_NewPhytologist_final.pdf | Versión final (acceso restringido) | 1,82 MB | Adobe PDF | Abrir Solicitar una copia |
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