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Browsing by Autor "JADE C. WILLIAMS"

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    Anatomía ecológica del xilema secundario de un bosque seco tropical de Venezuela
    (2005) Hugo Alejandro Jaramillo León; JADE C. WILLIAMS
    RESUMEN Se estudio la anatomia de la madera de 51 individuos de especies arboreas colectados en el bosque El Caimital, que corresponde a un bosque seco tropical, y se correlaciono la estructura anatomica con las condiciones del medio ambiente. Las caracteristicas estudiadas fueron numero de poros por mm 2 , diametro de poros, diametro de punteaduras, longitud de elementos vasculares, tipo de platinas de perforacion, presencia de cristales y silice. Se determinaron los indices de vulnerabilidad, mesomorfia y agrupamiento de vasos. En general se observo un predominio de caracteres que se orientan hacia la eficiencia de la conduccion. Segun el tamano de los poros, numero de vasos y los indices de vulnerabilidad y mesomorfia, el leno de los individuos estudiados puede designarse como mesomorfico. ABSTRACT The wood anatomy of 51 trees from El Caimital forest were studied from an ecological perspective and were compared with data from other habitats. The features studied were vessel frequency, vessel diameter, vessel element length, perforation plates, intervessel pit size, presence of crystals and silica. Vulnerability, mesomorphy and vessels grouping index were calculated. A predominance of characters towards hydraulic efficiency was observed. In accordance with vessel size, vessel number, mesomorphy and vulnerability index, the wood of the studied individuals can be characterized as mesomorphic

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