THE EXTENT OF SEED PREDATION BY BRUCHINE BEETLES (COLEOPTERA: CHRYSOMELIDAE: BRUCHINAE) IN A HETEROGENEOUS LANDSCAPE IN SOUTHEASTERN BRAZIL

THE EXTENT OF SEED PREDATION BY BRUCHINE BEETLES (COLEOPTERA: CHRYSOMELIDAE: BRUCHINAE) IN A HETEROGENEOUS LANDSCAPE IN SOUTHEASTERN BRAZIL

Author Rodrigues, Ligia M. S. Google Scholar
Viana, Jessica H. Google Scholar
Ribeiro-Costa, Cibele S. Google Scholar
Rossi, Marcelo Nogueira Autor UNIFESP Google Scholar
Institution Universidade de São Paulo (USP)
Universidade Federal do Paraná (UFPR)
Universidade Federal de São Paulo (UNIFESP)
Abstract In this study, seed predation rates imposed by bruchines and the composition of bruchine species and their host plants were assessed in a heterogeneous landscape in southeastern Brazil. Fruits were collected from 49 plants from 16 species belonging to four families, primarily Fabaceae. The five bruchine species collected emerged from four plant species as follows: Acanthoscelides macrophthalmus (Schaeffer) from Leucaena leucocephala (Lamarck) de Wit, Acanthoscelides sp. from Senna hirsuta (L.) Irwin and Barneby, Ctenocolum podagricus (F.) from Lonchocarpus muehlbergianus Hassler, and Gibbobruchus polycoccus (Fahraeus) and Gibbobruchus speculifer (Gyllenhal) from Bauhinia forficata Link. Bauhinia forficata is here recorded for the first time as a host for G. polycoccus. Only 1/4 of the local flora that was surveyed hosted bruchines. Bruchine and plant species composition varied among habitats, with most beetles found in plants located in the most disturbed habitat. Because of the economic importance of L. leucocephala in the tropics, we compared germination percentages between attacked and unattacked seeds of this species. The unattacked seeds had an average germination rate of 59%, and none of the attacked seeds germinated, showing that the germination of L. leucocephala seeds was drastically affected by predation.
Keywords ecology
Neotropics
predispersal seed predation
seed germination
semideciduous seasonal forest
seed beetles
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FAPESP: 06/58173-4
Date 2012-09-01
Published in Coleopterists Bulletin. Athens: Coleopterists Soc, v. 66, n. 3, p. 271-279, 2012.
ISSN 0010-065X (Sherpa/Romeo, impact factor)
Publisher Coleopterists Soc
Extent 271-279
Origin http://dx.doi.org/10.1649/072.066.0315
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000318822500015
URI http://repositorio.unifesp.br/11600/43408

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