Efecto de tratamientos de aclareo del piso dominante en pinares de repoblación sobre los rasgos morfológicos y el crecimiento del regenerado de Abies pinsapo Boiss
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2017-10-13
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Jaén: Universidad de Jaén
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[ES] Durante casi un siglo, los pinsapares (Abies pinsapo Boiss) han estado protegidos por las leyes de la Junta
de Andalucía. Su carácter relicto, además de su escasa distribución, lo convierten en una especie en
peligro, por lo que se han planteado varios programas de protección durante los últimos años, aunque los
usos del territorio y la amenaza del Cambio Global han promovido una mayor reducción de su capacidad.
El aumento de las temperaturas y el déficit de agua por la escasez de precipitaciones han provocado un
fuerte estrés que afecta al crecimiento de estos árboles. Este estrés está también asociado a la
competencia por los recursos, especialmente luz y agua, ejercida por individuos de repoblación de Pinus
halepensis. Los tratamientos silvícolas de entresaca realizados en Sierra de Grazalema y Sierra de las
Nieves actúan como mecanismo liberador para reducir este estrés por competencia y favorecer el regenerado natural del pinsapar.
[EN] For more than a century, pinsapo fir forests (Abies pinsapo Boiss) have been protected by the Andalusian regulations. The relict nature of this fir, in addition to its scarce distribution, makes it an endangered species, and several protection plans have been raised during the last years to protect these forests. Traditional land uses and the increasing threat of Global Change have reduced the colonization capacity of this species. The increasing temperatures and the scarcity of water due to the shortage of rainfall have promoted stress levels that affect its normal growth. This stress is also associated with competence for resources, especially light and water, mainly exerted by resettled Pinus halepensis individuals. Silvicultura! thinning treatments performed in Sierra de Grazalema and Sierra de las Nieves have promoted a growth release mechanism that have reduced the stress dueto competence and have estimulated the natural regeneration processes of the andalusian fir forests.
[EN] For more than a century, pinsapo fir forests (Abies pinsapo Boiss) have been protected by the Andalusian regulations. The relict nature of this fir, in addition to its scarce distribution, makes it an endangered species, and several protection plans have been raised during the last years to protect these forests. Traditional land uses and the increasing threat of Global Change have reduced the colonization capacity of this species. The increasing temperatures and the scarcity of water due to the shortage of rainfall have promoted stress levels that affect its normal growth. This stress is also associated with competence for resources, especially light and water, mainly exerted by resettled Pinus halepensis individuals. Silvicultura! thinning treatments performed in Sierra de Grazalema and Sierra de las Nieves have promoted a growth release mechanism that have reduced the stress dueto competence and have estimulated the natural regeneration processes of the andalusian fir forests.