5/1/2023 0 Comments Disco bees downloadstans may spread throughout rural environments with more opportunity to interact with pollinators, instead of nectar robbers. This pattern may not be controlled by nectar production since the secretion pattern was similar between habitats. stans faced up to higher resource theft (nectar and pollen) and lower fruit set. We found a higher predominance of primary and secondary nectar robbers in the urban area than in the rural environment. The main nectar robbers were stingless bees (Meliponini, Apidae) and carpenter bees (Xylocopini, Apidae). The populations of both habitats differed in the intensity of nectar robbing and pollinator activity. stans, mediated by the continuous nectar secretion and low natural fruit set. Our results indicated that nectar robbers provided neutral rather than negative impact on fruit and number of seeds in T. We also described the nectar-secreting pattern, and conducted experiments to test the effect of nectar robbing on plant female fitness. stans, we sampled robbery in pre-anthesis flowers, and the frequency of illegitimate and legitimate visits in both sites. In order to quantify the intensity of floral larceny and identify the flower-visiting insects on T. ex Kunth (Bignoniaceae), was tested in two typical exotic habitats in northeastern Brazil: urban area and rural land. In this study, the effect of nectar robbers on the female fitness of the ornamental and invasive yellow bells, Tecoma stans (L.) Juss. The results of this study provide important information for urban landscaping programs that aim to protect and preserve pollinators.įloral larceny is expected to impact negatively the female fitness of alien plant species however, the effects of nectar robbers are context-dependent and sometimes neutral. guajava should be considered key plants for the maintenance of these two urban euglossine bee species. After overlaying the distribution of both bee species and the three most important pollen resources, the distribution models revealed that these three plant species can co-occur with both euglossine bees throughout a large portion of eastern Brazil near the coast. paniculatum and Psidium guajava represented 87% of the diet of El. Pollen grains from Solanum paniculatum and Tradescantia zebrina represented 63% of the diet of Eg. nigrita with the former species showing higher diversity of pollen types collected (per pollen load and on average across pollen loads). cordata has a wider diet breadth than El. Contrary to our hypothesis, we found that Eg. We hypothesized that because bees with larger body sizes tend to have larger foraging areas, large-bodied bees would have a wider diet breath than small-bodied bees. Here, we integrate data from the pollen and species distribution models of two abundant euglossine bees-the large-bodied Eulaema nigrita (Lepeletier, 1841) and the small-bodied Euglossa cordata (Linnaeus, 1758)-in urban areas to investigate their overlap in diet breadth and distribution. However, it remains unclear what plant species commonly used for urban landscaping provide floral resources that pollinators actively use. Urban areas can serve as biodiversity refuges for pollinators because of the high diversity of available floral and nesting resources.
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