Climate-growth association of prosopis caldenia in the semiarid argentinean pampas
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Guillermo Jové [1]
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[1] INIA
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- Localización: XI young researchers meeting on conservation and sustainable use of forest systems / coord. por Elena Hidalgo Rodríguez, Francisco Javier Dorado Reyes, Ainhoa Iñiguez Soto, Diego A. Damián Carrión, Samuel Gato Martín, Guillermo Jové Alcalde, Raúl Arcadio Fernández González, 2017, ISBN 978-84-617-9574-1, pág. 40
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
The caldenal is a xerophytic forest that shrives in the driest part of the Argentinean pampas covering about 40 000 km2 mainly dominated by caldén (Prosopis caldenia Burkart Fabaceae) trees one emblematic endemic species of the country history that today is threatened bydeforestation. Besides, global change adds the need of new information about its growth dynamics and relationship with climate variables in order to predict its future behaviour. Standarddendrochronological methods were applied on eighteen trees of caldén growing under two contrasted densities, one without competition (about 1.6 trees•ha-1) and the other with a densityof about 414 trees•ha-1. Mean and cumulative radial growth curves were constructed. Growth release throughout time and climate-growth association was analysed. Growth dynamic was almost similar between both sampling sites. Growing rates -mean and cumulative radial growthwere higher on the low-density stand (5.12 mm and 357 mm vs. 3.94 mm and 267 mm). Common growth release during the fifties was detected in the low-density forest suggesting massivedeforestation. Trees from both stands were more vulnerable to temperature than to precipitation. The Open-stand condition sometimes seemed to determine a different behaviour pattern on climate-growth association. These results emphasize the value of dendroclimatic analysis in order to improve the knowledge about tree-growth dynamics and its association with climate variables under different growing conditions.
