RT Journal Article
T1 Population differentiation and plasticity in resistance, recovery and resilience to extreme drought events in Pinus pinaster
A1 Zas, Rafael
A1 Sampedro, Luis
A1 Solla, Alejandro
A1 Vivas, María
A1 Alía, Ricardo
A1 Rozas, Vicente
A1 Lombardero Díaz, María Josefa
K1 Adaptive variation
K1 Common garden
K1 Climate change
K1 Dendroecology
K1 Drought tolerance
K1 Extreme drought events
K1 Phenotypic plasticity
K1 Recovery
K1 Resilience
K1 Resistance
AB Quantifying intraspecific genetic variation and phenotypic plasticity of traits involved in drought tolerance is essential to forecast forest tree vulnerability to climate change. Tree ring analysis was applied to retrospectively assess the resistance, recovery and resilience of a Mediterranean pine in the face of extreme climate episodes. We combined a dendrochronological approach with the analysis of common-garden tests to disentangle genetic, environment and genetic-by-environment effects in growth responses of 10 P. pinaster populations to two extreme climatic events. Trees were 43 years old and had experienced two intense droughts, in 1995 and 2005.Drought events caused drastic reductions in secondary growth, but trees showed high capacity to recover predrought growth rates. The differences in the characteristics of the two drought events and the environmental distance between sites strongly modulated maritime pine responses to extreme droughts. However, a common among-population signal across sites and events was detected in the drought response strategy. Among- population variation in response to extreme droughts was evident for the resistance and recovery components, two strategies that appeared to trade-off between each other. Populations from Atlantic climates showed higher resistance but lower recovery capacity, whereas Mediterranean origins prioritised recovery over resistance. Mediterranean populations showed a more conservative strategy that indicated an adaptive advantage under water stress, reflected in greater long-term survival. The abovementioned relationships were clear in the site where the impact of the drought events was strongest, but not in the more favourable site. Differences in relationships between sites reflect that strategies of populations to cope with drought are strongly context dependent. Based on these results, we infer that future extreme droughts will differentially affect P. pinaster populations across the natural range of the species. Immediate effects will be more evident in Mediterranean areas but, in the long term, population persistence in the face of climate change will be more compromised for Atlantic origins. Because local environmental conditions can considerably modulate responses to extreme events, special attention is required to define appropriate management practices to mitigate the impact of future droughts.
PB Elsevier
SN 0168-1923
YR 2020
FD 2020-05-16
LK https://hdl.handle.net/10347/45111
UL https://hdl.handle.net/10347/45111
LA eng
NO Rafael Zas, Luis Sampedro, Alejandro Solla, María Vivas, María J. Lombardero, Ricardo Alía, Vicente Rozas, Dendroecology in common gardens: Population differentiation and plasticity in resistance, recovery and resilience to extreme drought events in Pinus pinaster, Agricultural and Forest Meteorology, Volume 291, 2020, 108060, ISSN 0168-1923, https://doi.org/10.1016/j.agrformet.2020.108060.
DS Minerva
RD 17 abr 2026