Abstract (en):
The seed density of Ulex europaeus was established on borders of invasive scrub thickets to the south of the Eastern Hills of Bogota. Through the direct counting method, seed abundance was established at six sampling points in an altitudinal gradient between 2.300 and 3.200 meters altitude, and for four soil depth ranges of 0 to 20 cm. Variable seed densities were established for the six sampling points between 109 and 3.384 seeds m-2. With regard to depth, the highest seed density was in the range of 0 to 5 cm for all sites sampled. Among the sampling points, significant differences were found in the number of seeds at different altitudes (p = 0,0416) and depth ranges evaluated (p=0,0392). There is a high potential at the edges of scrub for the extension of the invaded areas, by activation of the seed bank of the invasive species, suggesting the need for a priority strategy for the control of these border areas in the framework of ecological restoration processes in high Andean ecosystems.
Abstract (es):
Se estableció la densidad de semillas de retamo espinoso (Ulex europaeus) en bordes de matorral invasor al
sur de los Cerros Orientales de Bogotá. A través del método de conteo directo se estableció la abundancia de
semillas presente en seis puntos de muestreo en sitios ubicados entre los 2.700 y 3.200 m de altitud, y cuatro
intervalos de profundidad entre los 0 y 20 cm. Se establecieron densidades de semillas variables para los seis
puntos de muestreo entre 109 y 3.384 semillas m-2. A nivel de profundidad, la mayor densidad de semillas
se encuentra en el intervalo de 0 a 5 cm para todos los sitios muestreados. En los puntos de muestreo se
encontraron diferencias significativas en la cantidad de semillas a diferentes altitudes (p=0,0416) y intervalos
de profundidad evaluados (p=0,0392). Se determina que existe un alto potencial en los bordes de matorral para
la extensión de las áreas invadidas, por activación del banco de semillas de la especie invasora, lo que sugiere
la necesidad de una estrategia prioritaria para el control de estas áreas de borde en el marco de procesos de
restauración ecológica en ecosistemas altoandinos.
Keywords:
Bogotá, Colombia, Densidad de semillas, Gradiente altitudinal, Retamo espinoso (es)
Altitudinal gradient, Bogotá, Colombia, Gorse, Seed density (en)
Altitudinal gradient, Bogotá, Colombia, Gorse, Seed density (en)
How to Cite
Ocampo-Zuleta, K., & Solorza-Bejarano, J. (2017). Seed bank of the spiny reed, Ulex europaeus L., along edges of thickets of this invasive species in a zonal ecosystem of High Andes forest, Colombia. Biota Colombiana, 18(1 Sup), 89–98. https://doi.org/10.21068/c2017.v18s01a05
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