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OCR for page 307
Status of Pollinators in North America I Annual Bee Variability of Bee Abundances Family Genus Species Annual Variability Years Reference Apidae Apis 1 5.04 10 Roubik and Wolda, 2001 Apidae Centris 1 1.77 4 Roubik, 1989; unpublished data Apidae Centris 1 4.74 17 Roubik and Wolda, 2001 Apidae Euglossini 6 1.77 2 Pearson and Dressler, 1985 Apidae Euglossini 32 1.36 20 Roubik, 2001 Apidae Meliponini 10 4.06 17 Roubik and Wolda, 2001 Colletidae Ptiloglossa 1 2.45 17 Roubik and Wolda, 2001 Halictidae Megalopta 2 2.15 17 Roubik and Wolda, 2001 Halictidae Rhinetula 1 3.45 17 Roubik and Wolda, 2001 Megachilidae Megachile 3 2.07 3 Frankie et al., 1998 Megachilidae Osmia 1 2.46 2-3 Frankie et al., 1998 NOTE: Annual variability in bee abundance was determined from short- and long-term censuses in two tropical regions (Peru and Panama) and one temperate region (California). SOURCE: Adapted from Roubik, 2001.
OCR for page 308
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