Tesis Maestría en Ciencias en Recursos Naturales y Desarrollo Rural El Colegio de la Frontera Sur 1998

Bibliografía: hojas 16-22

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The aims of this work were to describe the habitat of species of subgenus Lepidobalams (genus Quercus) and to identify the main environmental variables that are related to their distribution in the Meseta Central of Chiapas, Southem Mexico. In 258 plots a dominance index was used, combining tree density and crown cover, for Quercus peduncularis, Q. polymorpha, Q. rugosa, Q. sebifera and Q. segoviensis. The following environmental variables were measured: altitude, winter precipitation, exposure, slope, intensity of fuel-wood harvesting and grazing. Detrended Canonical Correspondence Analysis was used for the statistical evaluation of data. Negative relationships between the dominance index of Q. peduncularis and Q. segoviensis and altitude and winter precipitation were found. The dominance index of Q. rugosa and Q. segoviensis was correlated with exposure and intensity of fuelwood harvesting. The altitude and to a lesser extent winter precipitation determined the distribution of the evaluated species. The main habitat characteristics of the species are described. The results suggest that Quercus peduncularis, Q. polymorpha, Q. rugosa, Q. segoviensis and Q. sebifera can be ecologically differentiated. Inglés

Manejo y Conservación de Recursos Naturales

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