Low growth resilience to drought is related to future mortality risk in trees

Severe droughts have the potential to reduce forest productivity and trigger tree mortality. Most trees face several drought events during their life and therefore resilience to dry conditions may be crucial to long-term survival. We assessed how growth resilience to severe droughts, including its c...

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Detalles Bibliográficos
Autores: DeSoto, Lucía, Cailleret, Maxime, Sterck, Frank, Jansen, Steven, Kramer, Koen, Robert, Elisabeth M. R., Aakala, Tuomas, Amoroso, Mariano Martin, Bigler, Christof, Camarero, J. Julio, Čufar, Katarina, Gea Izquierdo, Guillermo, Gillner, Sten, Haavik, Laurel J., Hereş, Ana Maria, Kane, Jeffrey M., Kharuk, Vyacheslav I., Kitzberger, Thomas, Klein, Tamir, Levanič, Tom, Linares, Juan C., Mäkinen, Harri, Oberhuber, Walter, Papadopoulos, Andreas, Rohner, Brigitte, Sangüesa Barreda, Gabriel, Stojanovic, Dejan B., Suarez, Maria Laura, Villalba, Ricardo, Martínez Vilalta, Jordi
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/159890
Acceso en línea:http://hdl.handle.net/11336/159890
Access Level:acceso abierto
Palabra clave:Dendrochronology
Forests
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
Descripción
Sumario:Severe droughts have the potential to reduce forest productivity and trigger tree mortality. Most trees face several drought events during their life and therefore resilience to dry conditions may be crucial to long-term survival. We assessed how growth resilience to severe droughts, including its components resistance and recovery, is related to the ability to survive future droughts by using a tree-ring database of surviving and now-dead trees from 118 sites (22 species, >3,500 trees). We found that, across the variety of regions and species sampled, trees that died during water shortages were less resilient to previous non-lethal droughts, relative to coexisting surviving trees of the same species. In angiosperms, drought-related mortality risk is associated with lower resistance (low capacity to reduce impact of the initial drought), while it is related to reduced recovery (low capacity to attain pre-drought growth rates) in gymnosperms. The different resilience strategies in these two taxonomic groups open new avenues to improve our understanding and prediction of drought-induced mortality.

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