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Is drought the main decline factor at the rear edge of southern Iberian pine plantations?
Presented by Dr. Raul SáNCHEZ-SALGUERO on 15 May 2013 from 18:00 to 21:00
Type: Poster Presentation
Session: Poster Session + Reception
Track: Recent growth changes and tree mortality
Board #: 50
The current climate change involves an increase in droughts events. We analyze the impact of drought on the radial growth and vigor of two pine species (Pinus sylvestris, Pinus nigra) in a semi-arid mountain at southeastern Spain near of their rear edge limit. We used dendrochronological methods, defoliation records, linear mixed and logistic models for growth and defoliation, respectively, to quantify changes at both species and individual scales. A temperature rise and a decrease in spring precipitation have led to drier conditions during the late century. The defoliation levels and reductions in growth were higher P. sylvestris than in P. nigra. The growth was favored by wet conditions in May and June in both species. The growth of defoliated trees responded more to water deficit and competition than that of less defoliated trees. Our results suggest that pine populations located in sub-optimal Mediterranean will not be viable in the long term if the frequency of extreme droughts increases.
Room: Salon E