Abundancia y distribución temporal de aves en la selva mediana subperennifolia en el centro de Veracruz, México

Abstract

THE BIRD SPECIES RICHNESS IN THREE I HA PERMANENT PLOTS IN TO TWO DIFFERENT SUCCESSIONAL PHASES OF VEGETATION, I. E. EARLY AND INTERMEDIATE SUCCESSION IS HERE PRESENTED. THE BIRD PREFERENCE FOR VERTICAL VEGETATION STRATA WAS DETERMINED BASED ON THEIR ABUNDANCE. ON EACH PLOT, SPECIES RICHNESS WAS ESTIMATED USING THE NON-PARAMETRIC TECHNIQUE "INCIDENCE-BASED COVERAGE ESTIMATOR". SAMPLINGS WERE PAIR COMPARED USING ANALYSIS OF SIMILARITY. POOLED SPECIES RICHNESS REACHED 75 BIRD SPECIES, OF WHICH 63% WERE RESIDENT, 29% MIGRATORY, AND 6% TRANSIENT, 24% OF SPECIES WERE ABUNDANT, 53% RARE, AND 23% SCARCE. THE HIGHEST NUMBER OF SPECIES OCURRED IN THE PLOT WITH EARLY SUCCESSION, WHEREAS THE INTERMEDIATE SUCCESSION PLOTS HAD LOWER NUMBERS. FOREST CANOPY PRESENTED THE HIGHEST SPECIES NUMBER WHEREAS UNDERSTORY AND MEDIUM STRATA SHOWED LOWER NUMBER OF SPECIES. THE NUMBER OF BIRD SPECIES POOLED IN THE THREE PLOTS REPRESENTS NEARLY 79% OF THE POTENTIAL NUMBER OF SPECIES. THE THREE PLOTS SHARE MORE THAN 50% OF BIRD SPECIES. NEVERTHELESS, IN ACCORDANCE TO THE SIMILARITY ANALYSES, PLOTS ARE CONSIDERED DIFFERENT IN SPECIES COMPOSITION FOR MOST OF THE MONTHLY SAMPLINGS.