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Bees are known to be essential in the maintenance of ecosystems, because of their role in the reproduction of plant species. However, is still unknown which flower characteristics and abiotic environmental conditions are essential for the presence of native bees in a particular ecosystem. These situations represent an issue under constant research because those variables occur in a combination that varies at space and temporal scales. In the present work, we carried out an analysis on native bee visitation activity to Loasa tricolor flowers in relation to the possible influence of environmental temperature and floral variables by comparing two flowering seasons occurring during consecutive years in two localities of the Valparaíso Region, Chile. For this we have estimated the richness and the number of native bees visiting the flowers, and also we have obtained information about environmental temperature, nectar concentration and floral temperature during González-Césped et al.: Visita de abejas nativas (Apoidea) hacia Loasa tricolor Ker-Gawl. 452 flowering seasons in both localities. The results show a negative correlation between temperature and richness of bees, and the number of visits. In relation with flower characteristics, the results show a negative correlation between temperature and nectar concentration while, floral temperature have no significant correlation with bee visitation.

revista chilena de entomología/revista chilena de entomología

Actividad de visita de abejas nativas (Hymenoptera: Apoidea) hacia Loasa tricolor Ker-Gawl. (Loasaceae) en relación con temperatura ambiental y recursos florales