Seed predators insects of Cassia leptophylla and the relation between the periods pre and post-dispersive
DOI:
https://doi.org/10.5216/rbn.v12i2.28302Keywords:
Bruchinae, insect-plant interactions, seasonality, TortricidaeAbstract
This study determined which species of insects prey on the seeds of Cassia leptophylla during the pre and post-dispersive period, in a conservation area located in the Reserve of Iguaçu, Paraná, Brazil. Parameters of abundance and seasonality, and seed predation were evaluated with two hypothe- ses being presented: the seed predation by insects is continuous during both dispersive periods; the same guild of insects performs predation. Three species were found preying on seeds of C. leptophylla; pre-dispersion Pygiopachymerus lineola, Sennius leptophyllicola and Cydia tonosticha. There was the exception of the presence of S. leptophyllicola from post-dispersal. The result shows the importance of food resource provided by the seed, for predatory insects, which preyed on 42 % of the viable seeds at the end of a cycle of fruiting plant. The differences in the abundance of individuals between the disper- sive periods probably relate to bionomic intrinsic and ecological characteristics, with the possibility to emphasize greater specialization of species with respect to the ability to exploit different niches.
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