DEPREDACIÓN DE LAS SEMILLAS DE Sapindus saponaria L. POR Leptostylus gibbulosus Bates (COLEOPTERA: CERAMBYCIDAE) Y SU EFECTO EN LA GERMINACIÓN
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Universidad Distrital Francisco José de Caldas
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La depredación de semillas es considerada como un proceso selectivo que puede disminuir el éxito reproductivo de las plantas. Para caracterizar la depredación por el cerambícido Leptostylus gibbulosus y su efecto en la germinación, se examinaron frutos y semillas de Sapindus saponaria recolectados durante los años 2009 y 2010 en el municipio de Anolaima. Para tal fin, se evaluó la relación entre la incidencia y la severidad del ataque y el tamaño de los frutos y semillas. Se encontró que L. gibbulosusafectó 20 % de las semillas, prefiriendo semillas grandes y redujo considerablemente la germinación, siendo su efecto más notorio en las semillas de menor tamaño. Se registra por primera vez para Colombia la ocurrencia del longicornio, L. gibbulosus asociado a semillas de S. saponaria.
Seed predation has been considered as a selective process that decreases reproductive fitness of plant species. Fruits and seeds of Sapindus saponaria collected in Anolaima town, between 2009 and 2010 were used to characterize predation of Leptostylus gibbulosus (Cerambycidae) and its effects on germination based on the relation within incidence and severity attack and size of fruit and seeds. Results show that L. gibbulosus affected 25 % of seed under study and considerably reduced germination and reproductive fitness of predated seeds, principally in large seeds. The association between L. gibbulosus and S. saponaria seeds is registered for the first time in Colombia.
Seed predation has been considered as a selective process that decreases reproductive fitness of plant species. Fruits and seeds of Sapindus saponaria collected in Anolaima town, between 2009 and 2010 were used to characterize predation of Leptostylus gibbulosus (Cerambycidae) and its effects on germination based on the relation within incidence and severity attack and size of fruit and seeds. Results show that L. gibbulosus affected 25 % of seed under study and considerably reduced germination and reproductive fitness of predated seeds, principally in large seeds. The association between L. gibbulosus and S. saponaria seeds is registered for the first time in Colombia.
Palabras clave
fruit predation, pre-dispersion predation, seed predation, incidence, severity, germinative fitness., depredación de frutos, depredación predispersiva, depredación de semillas, incidencia, severidad, vigor germinativo.