Tropical Ecology and Conservation [Monteverde Institute]

Creator

Emily Leamy

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Publication Date

September 1999

Abstract

Reproduction by vegetative fragments of cloud forest plants was studied at Monteverde, Costa Rica. The relative frequency of reproduction via seeds and plant fragments was quantified on trail edges and in forest understories, along an elevational and east-west gradient encompassing the Continental Divide. The proportion of young plants that originated from fragments in the understory increased with elevation and on the east-facing slope. A similar trend was found along the trail edge, with the highest proportion of fragments at the Continental Divide. The diversity and composition of plants that reproduce via fragmentation was compared among three sites (west-facing, Continental Divide, and east-facing). No significant species diversity overlap was found using the Sorenson quantitative index, and a modified t-test showed no significant differences in diversity between each of these three sites. Occurrence of fragmentation is related to levels of wind, moisture, sunlight, nutrients, density of the understory, terrain, and decomposition rates of specific sites and elevations. Se estudio la reproducción por partes vegetativas de la planta (fragmentas) en el Bosque Nuboso de Monteverde, Costa Rica. Se cuantifico la frecuencia relativa de reproducción para las semillas y fragmentos de plantas en los bordes de senderos y en el sotobosque, a lo largo de un gradiente de elevación en la División Continental. La proporción de plantas jóvenes que se originaron de fragmentos en el sotobosque aumento con la elevación y en la area este. Una tendencia similar se encontro a lo largo del sendero, con la proporción mas alta de fragmentos en la División Continental. La diversidad y composición de plantas que se reproducción vía fragmentos fue comparada entre tres sitios (Lado Oeste, División Continental, y Lado Este). No se encontro diferencia significativa entre la diversidad de especies entre los tres sitios (p < 0.05). El índice de Sorenson fue utilizado para ver similitudes y no se encontro diferencia tampoco (p < 0.05). La ocurrencia de fragmentos es relacionado con los niveles de viento, humedad, luz, niveles de nutrientes, densidad del sotobosque, terreno, y el grado de descomposición de los sitios específicos y elevaciones.

Description

Student affilliation: Department of Biology, James Madison University Born Digital

Genre

Reports

Holding Location

Monteverde Institute MVI

Identifier

M39-00002

Vegetative fragmentation within two microhabitats along an altitudinal gradient in the Monteverde cloud forest, Costa Rica

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