Aspectos ecológicos de Pseudotsuga menziesii en el ejido La Barranca, Pinal de Amoles, Querétaro

Abstract

TO DESCRIBE THE ECOLOGIC CONDITIONS, BOTANICAL COMPOSITION AND POPULATION STRUCTURE OF PSEUDOTSUGA MENZIESII (MIRB.) FRANCO, AT EJIDO LA BARRANCA, PINAL DE AMOLES, QRO., SOIL AND VEGETATION SAMPLES FROM THIS LOCATION WERE ANALYZED. THE STUDY SITE IS GEOGRAPHICALLY LOCATED BETWEEN THE NE AND CENTRAL MEXICO, SO A REVIEW OF THE ECOLOGICAL CONDITIONS IN THIS POPULATION MIGHT BE USEFUL TO UNDERSTAND THE DISPERSION OF PSEUDOTSUGA MENZIESII IN THESE REGIONS. INFORMATION ON PHYSICAL AND CHEMICAL CHARACTERISTICS OF SOILS, BOTANICAL COMPOSITION, POPULATION STRUCTURE, AND NATURAL REGENERATION WAS OBTAINED FROM THE SAMPLING. PSEUDOTSUGA MENZIESII STANDS ARE LOCATED AT ELEVATIONS BETWEEN 2780 AND 2980 M, ON STEEP SLOPES WITH NW, N AND NE EXPOSITIONS; THE COMMUNITY IS DOMINATED BY QUERCUS GREGGII, PSEUDOTSUGA MENZIESII AND ABIES RELIGIOSA. SOILS ARE RELATIVELY SHALLOW, RICH IN P AND CA, AND POOR IN K AND MG. POPULATION STRUCTURE IS UNBALANCED, WITH A LOW PROPORTION OF TREES IN THE SMALLER SIZE CATEGORIES AND SCARCE NATURAL REGENERATION OF THE SPECIES, SO A SPECIAL MANAGEMENT PROGRAM IS REQUIRED TO INCREASE SEEDLING RECRUITMENT AND ENSURE ITS PRESENCE IN THIS LOCATION.