Short-term resilience after drought-induced die-off in SW European forests
Lloret Maya, Francisco (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Jaime, Luciana (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Margalef Marrasé, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Pérez Navarro, María Ángeles (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Batllori, Enric (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2022
Resum:	Drought-induced die-off in forests is becoming a widespread phenomenon across biomes, but the factors determining potential shifts in taxonomic and structural characteristics following mortality are largely unknown. We report on short-term patterns of resilience after drought-induced episodes of tree mortality across 48 monospecific forests from Morocco to Slovenia. Field surveys recorded plants growing beneath a canopy of dead, defoliated and healthy trees. Site-level structural characteristics and management legacy were also recorded. Resilience was assessed with reference to forest composition (self-replacement), structure, and changes in the climatic suitability of the replacing community relative to the climatic suitability of the dominant pre-drought species. Species climatic suitability was estimated from species distribution models calculated for the baseline 1970-2000 period. Short-term resilience decreased under higher levels of drought-induced damage to the dominant species and with evidences of management legacy. Greater resilience of structural features (fewer gaps, greater canopy height) was observed overall in forests with a larger basal area. Less gaps were also associated with greater woody species richness after drought. Overall, Fagaceae-dominated forests exhibited greater structural resilience than conifer-dominated ones. On those sites that were more climatically suited to the dominant pre-drought species, replacing communities tended to exhibit lower climatic suitability than pre-drought dominant species. There was a greater loss of climatic suitability under a legacy of management and drought intensity, but less so in the replacing communities with higher woody species richness. Our study reveals that short-term forest resilience is determined by pre-drought stand characteristics, often reflecting previous management legacies, and by the impact of drought on both the dominant pre-drought species and post-drought replacing species in terms of their climatic suitability.
Ajuts:	Ministerio de Economía y Competitividad CGL2015-67419-R Agencia Estatal de Investigación PID2020-115264RB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1001 Agencia Estatal de Investigación CGL2017-87176-P
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Castellà
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Climate change ; Drought-induced die-off ; Drought events ; Forest mortality ; Forest resilience ; Species climatic suitability
Publicat a:	Science of the total environment, Vol. 806, Part 4 (February 2022) , art. 150940, ISSN 1879-1026

DOI: 10.1016/j.scitotenv.2021.150940

Postprint 49 p, 1.2 MB

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