Abstract
Populations of Ludwigia elegans (Carnb.) Hara were examined in Aluminio (600m) and Campos do Jordão (1520m), in the State of São Paulo. Flowers of both populations are self-incompatible and dependent on bees for pollination. Flowers of Ludwigia elegans at the Aluminio site were visited by about 30 different species of bees, and those at Campos do Jordão by 10. These results can be related to climatic differences at the two sites, especially temperature, due to their difference in altitude. Inspite of the difference in the absolute number of bee species seen at each site, Tetraglossula anthracina (Michener, 1989) (Colletidae) can be considered a specialized and efficient pollinator in both areas, since it visited these flowers frequently and showed many morphological and behavioral adaptations for pollen and nectar collection.
Apoidea; Ludwigia elegans; Tetraglossula; Rhophitulus; Pseudagapostemon
Interactions between bees and Ludwigia elegans (Camb.) Hara (Onagraceae) flowers at different altitudes in São Paulo, Brazil
Miriam Gimenes
Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana. Rodovia BR 116, Km 3, 44031-460 Feira de Santana, Bahia, Brasil. E-mail: mgimenes@uefs.br
ABSTRACT
Populations of Ludwigia elegans (Carnb.) Hara were examined in Aluminio (600m) and Campos do Jordão (1520m), in the State of São Paulo. Flowers of both populations are self-incompatible and dependent on bees for pollination. Flowers of Ludwigia elegans at the Aluminio site were visited by about 30 different species of bees, and those at Campos do Jordão by 10. These results can be related to climatic differences at the two sites, especially temperature, due to their difference in altitude. Inspite of the difference in the absolute number of bee species seen at each site, Tetraglossula anthracina (Michener, 1989) (Colletidae) can be considered a specialized and efficient pollinator in both areas, since it visited these flowers frequently and showed many morphological and behavioral adaptations for pollen and nectar collection.
Key words: Apoidea, Ludwigia elegans, Tetraglossula, Rhophitulus, Pseudagapostemon
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ACKNOWLEDGEMENTS. The author wish to thank M.A.C. Lopes for his help during the field observations and for preparing the figures. M.D. Marques for his collaboration, FZanella for criticai reading the manuscripr, as well as J.S. Moure, L. Ruz, G.A.R Melo and D.A. Yanega for the identifications ofthe bees. To the administrator of Parque Estadual de Campos do Jordão and of the Fazenda Gil' for the support during the field observation. Financiai support received frorn CAPES and CNPq was greatly appreciated.
Received in 13.VII.2001; accepted in 18.VII.2002.
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Publication Dates
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Publication in this collection
15 May 2009 -
Date of issue
Sept 2002
History
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Accepted
18 July 2002 -
Received
13 July 2001