Diversity and Seasonality of Male Euglossine Bees (Hymenoptera: Apidae) in Central PanamÁ

摘要: Seasonal changes in species richness, composition, and abundance of male euglossine bees were determined by weekly censusing individuals attracted to 16 chemical baits. Bee popu- lations monitored for > 1 yr the lowland tropical moist forest seasonally dry Barro Colorado Island (BCI), Panama. Male also censused once every 4 wk at three nearby mainland sites, two low elevation, one a middle-elevation locality. Among sites bee communities varied little; dominance ranks, species' phenological profiles, seasonal similar. populations these probably influenced factors similar timing mag- nitude. In contrast, community upland locality differed from lowlands composition fluctuations abundance. At all census had four genera (Eulaema, Euglossa, Eufriesia, Exaerete), 33-44 species, evenness On BCI, relative was not constant throughout year. Species richness correlated; both fluctuated seasonally, peaked early wet season. However, evenness, ranks virtually nonseasonal, so some structural continuity existed community.