Pollen Resources Stored in Nests of Wild Bees Xylocopa ciliata Burmeister and Megachile pusilla Pérez (Hymenoptera: Anthophila) in a Temperate Grassland-Forest Matrix

Favio Gerardo Vossler


Pollen analysis was employed to study the diet composition of two wild bees in a patch of temperate grassland invaded by exotic plants. Thirty pollen types from 14 families and two unidentified types were present in the seven samples analyzed. The three samples from Megachile pusilla Pérez were composed of 100% Lotus glaber and the four samples from Xylocopa ciliata Burmeister of abundant pollen (˃5%) of Lotus glaber, Galega offi cinalis, Adesmia bicolor and type Senna-Chamaecrista (all Fabaceae). The latter resource likely foraged out of the park, which could be an evidence to support its pollen preference for Fabaceae. However, a larger number of samples is necessary to identify the specialization status of X. ciliata. The preference for Lotus in this site was due to temporal specialization as M. pusilla was identified as polylectic in its origin area, and this could help to explain its eff ective naturalization in the New World and other areas of the Old World.


Adesmia; entomopalynology; Galega; Lotus; pollen feces; pollen provisions

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Buchmann, S.L. (1983). Buzz pollination in angiosperms. In C.E. Jones & R.J. Little (Eds.), Handbook of Experimental Pollination Biology (pp. 73–114). New York: Scientific and Academic Editions.

Cabrera, A.L. (1971). Fitogeografía de la República Argentina. Boletín de la Sociedad Argentina de Botánica 14: 1–42.

Cane, J.H. & Sipes, S. (2006). Characterizing floral specialization by bees: analytical methods and a revised lexicon for oligolecty. In N.M. Waser & J. Ollerton (Eds.), Plant-Pollinator Interactions. From specialization to generalization (pp. 99–122). Chicago and London: The University of Chicago Press.

Dalmazzo, M. (2010). Diversidad y aspectos biológicos de abejas silvestres de un ambiente urbano y otro natural de la región central de Santa Fe, Argentina. Revista de la Sociedad Entomológica Argentina 69: 33–44.

Erdtman, G. (1960). The acetolysis method, a revised description. Svensk Botanisk Tidskrift 54: 561–564.

Gonçalves, R.B., & Melo, G.A.R. (2005). A comunidade de abelhas (Hymenoptera, Apidae s.l.) em uma área restrita de campo natural no Parque Estadual de Vila Velha, Paraná: diversidade, fenologia e fontes florais de alimento. Revista Brasileira de Entomologia 49: 557–571. doi: 10.1590/S0085-56262005000400017

Hurd, P.D. (1978). An annotated catalog of the carpenter bees (genus Xylocopa Latreille) of the Western Hemisphere (Hymenoptera: Anthophoridae). Washington: Smithsonian Institution Press, 106 p.

Kleinert-Giovannini, A. & Imperatriz-Fonseca, V.L. (1987). Aspects of the trophic niche of Melipona marginata marginata Lepeletier (Apidae, Meliponinae). Apidologie 18: 69–100.

Minckley, R.L. & Roulston, T.H. (2006). Incidental mutualisms and pollen specialization among bees. In N.M. Waser & J. Ollerton (Eds.), Plant-Pollinator Interactions. From specialization to generalization (pp. 69–98). Chicago: The University of Chicago Press.

Müller, A. & Kuhlmann, M. (2008). Pollen hosts of western palaearctic bees of the genus Colletes (Hymenoptera: Colletidae): the Asteraceae paradox. Biological Journal of the Linnean Society 95: 719–733. doi: 10.1111/j.1095-8312.2008.01113.x

Ramalho, M., Imperatriz-Fonseca, V.L., Kleinert-Giovannini, A. & Cortopassi-Laurino, M. (1985). Exploitation of fl oral resources by Plebeia remota Holmberg (Apidae, Meliponinae). Apidologie, 16: 307–330.

Robertson, C.H. (1925). Heterotropic bees. Ecology 6: 412–436.

Robertson, C.H. (1926). Revised list of oligolectic bees. Ecology 7: 378–380.

Sakagami, S.F., Laroca, S. & Moure, J.S. (1967). Wild bee biocoenotics in São José dos Pinhais (PR), south Brazil. Journal of the Faculty of Science, Hokkaido University. Series 6, Zoology 16: 253–291.

Sakagami, S.F. & Laroca, S. (1971). Observations on the bionomics of some Neotropical xylocopine bees, with comparative biofaunistic notes (Hymenoptera: Anthophoridae). Journal of the Faculty of Science, Hokkaido University. Series 6, Zoology 18: 57–127.

Schlindwein, C. (1998). Frequent oligolecty characterizing a diverse bee-plant community in a xerophytic buschland of subtropical Brazil. Studies on Neotropical Fauna and Environment 33: 46–59.

Schlindwein, C., Schlumpberger, B., Wittmann, D. & Moure, J.S. (2003). O gênero Xylocopa Latreille no Rio Grande do Sul, Brasil (Hymenoptera, Anthophoridae). Revista Brasileira de Entomologia 47: 107–118. doi: 10.1590/S0085-56262003000100016

Soltani, G.G., Bénon, D., Alvarez, N. & Praz, C.J. (2017). When different contact zones tell different stories: putative ring species in the Megachile concinna species complex (Hymenoptera: Megachilidae) Biological Journal of the Linnean Society 20: 1–18. doi: 10.1093/biolinnean/blx023

Vogel, S. (1978). Evolutionary shifts from reward to deception in pollen flowers. In A.J. Richards (Ed.), The pollination of flowers by insects (pp. 89–96). London: Academic Press.

Vossler, F.G. (2013). The oligolecty status of a specialist bee of South American Prosopis (Fabaceae) supported by pollen analysis and floral visitation methods. Organisms Diversity and Evolution 13: 513–519. doi: 10.1007/s13127-013-0134-6

Vossler, F.G. (2014). A tight relationship between the solitary bee Calliopsis (Ceroliopoeum) laeta (Andrenidae, Panurginae) and Prosopis pollen hosts (Fabaceae, Mimosoideae) in xeric South American woodlands. Journal of Pollination Ecology 14: 270–277.

Vossler, F.G. (2018). Are stingless bees a broadly polylectic group? An empirical study of the adjustments required for an improved assessment of pollen diet in bees. In P. Vit, S.R.M. Pedro & D.W. Roubik (Eds.), Pot-Pollen in Stingless Bee Melittology (pp. 17–28). Cham: Springer. doi: 10.1007/978-3-319-61839-5

DOI: http://dx.doi.org/10.13102/sociobiology.v65i4.3470


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