Spatial-temporal variation in orchid bee communities (Hymenoptera:Apidae) in remnants of arboreal caatinga in the Chapada Diamantina Region, State of Bahia, Brazil - Andrade-Silva, Aline Candida Ribeiro; Nemésio, A.; Oliveira, F. F. de; Nascimento, Fábio Santos do (Neotropical Entomology, 2012)