标题：Análisis demográfico preliminar de Taxus globosa Schlecht en el Parque Nacional El Chico, Hidalgo, México. I: Población de adultos y algunas características del hábitat
摘要：The preliminary evaluation of the adult population of "Taxus globosa" entails an analysis of the number of adult individuals, some of their dasometrical characteristics, and data about their habitat. The species was found in fir, fir-oak and oak forests; mostly near the bottom of ravines, at an altitude between 2,530 and 2,710 meters above sea level, in slightly acid soil. The number of adults examined was 75, with an average height of 4.5 to 1.6 meters and a near-the-base diameter of 28.6 to 22 centimeters. The ratio of male to female trees was 1 to 1.3. Almost 23 percent of the adults examined had hollow stems, which could explain their susceptibility to being uprooted by the wind. This, together with the scarcity of adult females, suggests the necessity of taking actions designed to increase the population of T. globosa in the area.
其他摘要：The preliminary evaluation of the adult population of "Taxus globosa" entails an analysis of the number of adult individuals, some of their dasometrical characteristics, and data about their habitat. The species was found in fir, fir-oak and oak forests; mostly near the bottom of ravines, at an altitude between 2,530 and 2,710 meters above sea level, in slightly acid soil. The number of adults examined was 75, with an average height of 4.5 to 1.6 meters and a near-the-base diameter of 28.6 to 22 centimeters. The ratio of male to female trees was 1 to 1.3. Almost 23 percent of the adults examined had hollow stems, which could explain their susceptibility to being uprooted by the wind. This, together with the scarcity of adult females, suggests the necessity of taking actions designed to increase the population of T. globosa in the area.
关键词：Scarse species; Taxus globosa; Female trees; Male trees; Habitat Especies en extinción; Taxus globosa; Árboles hembra; Árboles macho; Hábitat.
