Abstract (en):
Fragmentation is defined as the transformation of natural habitats into smaller forest patches that are isolated and immersed in matrices of reduced vegetation cover. The derived patches are exposed to the conditions of the external environment or edge effects, which can cause changes on the structure of plant communities and their regeneration. In this study, we evaluated the effect of the distance to the edge on the structure, diversity and regeneration potential of woody plants in two dry forest fragments. An active process of natural regeneration was registered; nevertheless, an edge effect on the studied variables for both fragments was not evidenced. The absence of an edge effect might be given by the time passed from the formation of the fragment, during which regeneration processes have produced vegetation that is similar in composition and structure to the whole forest. It was also observed that the matrices that surround these fragments constitute a barrier for their expansion and connectivity.To overcome such barrier, it is necessary to implement strategies that favor the dispersion of seeds towards the exterior and optimize the conditions for the germination and the establishment of the new individuals.
Abstract (es):
La fragmentación es de nida como el proceso de trasformación de un hábitat natural en parches de menor área, aislados entre sí e inmersos en matrices de menor cobertura vegetal. Los parches resultantes quedan expuestos a las condiciones del ambiente exterior o efectos de borde, que pueden ocasionar cambios en la estructura y regeneración de las comunidades vegetales. En esta investigación se evaluó el efecto de borde sobre la estructura, diversidad y potencial de regeneración de plantas leñosas en dos fragmentos de bosque seco. Se registró un proceso activo de regeneración natural, sin embargo, no se encontró un efecto de borde sobre las variables estudiadas para ambos fragmentos. La ausencia de efecto de borde podría estar dada por el tiempo transcurrido desde la formación del fragmento. Durante este tiempo han estado activos los procesos de regeneración, dando lugar a una vegetación de estructura y composición similar en todo el bosque. También se observó que las matrices de estos fragmentos constituyen una barrera para su expansión y conectividad, y para superarla se hace necesaria la implementación de estrategias que favorezcan la dispersión de semillas hacia el exterior y, se optimicen las condiciones para la germinación y el establecimiento de los nuevos propágulos.
Keywords:
Efecto de borde, Fragmentacio?n, Juveniles, Pla?ntulas, Reclutamiento (es)
Edge effect, Fragmentation, Recruitment, Sapling, Seedlings (en)
Edge effect, Fragmentation, Recruitment, Sapling, Seedlings (en)
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How to Cite
Henao, N., Torres, A. M., Tafur, J. C., & Guevara, L. (2018). Is there an edge effect on the vegetation structure and regeneration potential of tropical dry forest fragments?. Biota Colombiana, 19(1), 3–20. https://doi.org/10.21068/c2018.v19n01a01
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