Revista de Biología Tropical ISSN Impreso: 0034-7744 ISSN electrónico: 2215-2075

OAI: https://revistas.ucr.ac.cr/index.php/rbt/oai
Diversity of regenerating plants and seed dispersal in two canopy trees from Colombian Amazon forests with different hunting pressure
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Keywords

Hipotesis de la colonización
compensación por densidad
hipótesis de Janzen-Connell
diversidad de plantas
comunidad de primates
dispersión de semillas
Colonization hypothesis
Density compensation
Janzen-Connell hypothesis
Plant diversity
Primate Communities
Seed dispersal

How to Cite

Andrea Barrera Zambrano, V., Zambrano Moncada, J., & R. Stevenson, P. (2008). Diversity of regenerating plants and seed dispersal in two canopy trees from Colombian Amazon forests with different hunting pressure. Revista De Biología Tropical, 56(3), 1531–1542. https://doi.org/10.15517/rbt.v56i3.5727

Abstract

Hunting may have drastic effects on some populations of frugivores and seed dispersal agents, which in turn may affect patterns of forest regeneration and plant diversity. However, when a species disappears, it is possible that the population of other species increases due to competition release, compensating or not, their ecological roles. The main aim of this study was to measure density compensation in primate communities, their possible effects on seedling and sapling diversity, and compensation of seed removal rates in two canopy trees (Apeiba aspera and Hymenaea oblongifolia). The study site was Amacayacu National Park (Colombian Amazon), where we carried out a census of mammal species using line transect methods in two forests with different levels of hunting pressure. Vegetation plots were used to quantify plant diversity for seedlings and saplings (4 m2 and 25 m2 respectively), and fruit traps were set up to estimate seed removal of A. aspera and H. oblongifolia. Large primates were less frequently encountered near human settlements, while small primates exhibited the opposite pattern, suggesting a density compensation effect. The diversity of regenerating plants was higher in the forest where large primates occur. Seed removal was higher in forests with large primates for A. aspera, but not for H. oblongifolia. Overall, the results support the hypothesis of density compensation on the primate community; however, there is no strong evidence of ecological compensation in terms of seed dispersal and regeneration in the species studied. Finally, the presence of large seed dispersers (e.g. Lagothrix lagothricha) was associated with higher plant diversity.
https://doi.org/10.15517/rbt.v56i3.5727
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