Disponible para usuarios de ECOSUR con su clave de acceso

Among the many Magnolia species that are endangered by anthropogenic disturbance, some are knownto have the capacity to produce new shoots. Demographic studies are an important tool to evaluate the impact of disturbances as well as the resilience and resistance of endangered species. Our study lookedat the demographic dynamics of two Magnolia schiedeana populations, with an aim to determine therole played by disturbances. The questions were: 1) what demographic trends characterize this species? 2) What differences are there between disturbed and undisturbed populations? 3) Is M. schiedeana adisturbance-resilient species in general? 4) How important is the contribution of the resprouting trait to λ in a population under anthropogenic disturbance? The demographic attributes evaluated were: elasticity, population growth rate (λ), and sensitivity to concrete disturbances (LTRE, Life Table Response Experiment). The results indicated that the λ of the two populations did not differ significantly. The transitions that contributed the most to λ and presented the largest variation were similar in both population sunder study. More than 90% of the contribution came from those individuals measuring ≤ 5 cm in diameter. Surprisingly, M. schiedeana is not sensitive to moderate anthropogenic disturbance. Resprouting contributed to with less than 0.2%. Inglés

Disponible en línea

Adobe Acrobat profesional 6.0 o superior