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handle: 10261/61087
[EN] The contribution of secondary growth's patterns and wood anatomy on the coexistence of two species of Quercus (Quercus ilex subsp ballota - diffused porous wood - and Quercus faginea - ring porous wood -) were studied in a location with continental Mediterranean climate, which has been studied during two years with contrasted climatology. According to our results secondary growth pattern of Q. faginea is concentrated in the spring, starting before, and responding more than Q. ilex to a rainfall increase during this period. Q. ilex extends wood formation into the fall and late summer growth. Q. ilex growth during the fall and late summer has a greater importance in terms of theoretical hydraulic conductivity than in Q. faginea, which concentrates hydraulic conductivity in spring vessels. Therefore, different response of wood phenology formation and xylem anatomy in both species to the seasonal pattern of precipitation could contribute to explain the coexistence of Q. ilex and Q. faginea. [ES] 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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