Dinámica estacional del crecimiento secundario y anatomía del xilema en dos Quercus mediterráneos que coexisten
Abstract
Se estudió la contribución de los patrones de crecimiento secundario y la anatomía de la madera a la coexistencia de dos especies de Quercus (Quercus ilex subsp. ballota —especie de madera de porosidad semi-difusa— y Quercus faginea —especie de madera de porosidad en anillo—), en una localidad de clima mediterráneo continental, durante dos años de climatología contrastada. Según nuestros resultados el patrón de crecimiento secundario de Q. faginea se concentra en primavera, iniciándose antes, y respondiendo más que el de Q. ilex a un incremento de la precipitación durante este periodo. Q. ilex prolonga la formación de madera hacia el otoño y el crecimiento del verano tardío tiene una mayor importancia en términos de conductividad hidráulica teórica que en Q. faginea, que concentra la conductividad hidráulica en los vasos formados en primavera. Por tanto, la distinta respuesta de la fenología de formación de la madera y de la anatomía del xilema de ambas especies al patrón estacional de precipitación podría contribuir a explicar la coexistencia de Q. ilex y Q. faginea.
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References
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