Oviposition pattern and within-season spatial and temporal variation of pre-dispersal seed predation in a population of Mimosa bimucronata trees

Oviposition pattern and within-season spatial and temporal variation of pre-dispersal seed predation in a population of Mimosa bimucronata trees

Author Rossi, Marcelo N. Autor UNIFESP Google Scholar
Silva Rodrigues, Ligia M. da Google Scholar
Ishino, Marcos N. Google Scholar
Kestring, Debora Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
São Paulo State Univ Uniesp
Abstract Spatial and temporal variation of pre-dispersal seed predation was investigated in a population of Mimosa bimucronata trees located in the south-east region of Brazil. Three main hypotheses were addressed: (1) that the life stages of the seed predator Acanthoscelides schrankiae are synchronised with the reproductive stages of its host plant; (2) that seed predation levels vary spatially as a result of differences in fruiting phenology synchrony and fruit production among trees; and (3) that predation levels should be affected by the proximity of trees, showing a spatial structure. Also investigated was the oviposition pattern of A. schrankiae among seeds and fruits. Twenty spatially referenced trees were monitored throughout a year to examine tree phenology and egg laying and adult emergence. the bruchine's life stages were synchronised with the reproductive stages of M. bimucronata trees. Egg distribution among seeds and fruits was aggregated. Infestation rates of adult bruchines were not spatially related to fruiting phenology and there is evidence that seed predation is a spatially density-independent process, because the relationship between infestation rates and fruit production was not significant. Finally, it was observed that the distribution of adult bruchines was spatially structured, because similar levels of infestation were found among nearby trees.
Keywords Bruchinae
Oviposition
Plant phenology
Seed predation
Spatiotemporal variation
Synchrony
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FAPESP: 04/06737-6
FAPESP: 05/59605-2
FAPESP: 05/52569-0
Date 2011-09-01
Published in Arthropod-plant Interactions. Dordrecht: Springer, v. 5, n. 3, p. 209-217, 2011.
ISSN 1872-8855 (Sherpa/Romeo, impact factor)
Publisher Springer
Extent 209-217
Origin http://dx.doi.org/10.1007/s11829-011-9130-y
Access rights Closed access
Type Article
Web of Science ID WOS:000293923700006
URI http://repositorio.unifesp.br/handle/11600/34003

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