Floral visitors of Aechmea constantinii (Mez) L. B. Sm. (Bromeliaceae) in a remnant of the Brazilian Northeast Atlantic Rainforest

Abstract

This study aims to determine the fl oral visitors and potential pollinators of Aechmea constantinii (Mez) L. B. Sm. (Bromeliaceae), a bromeliad endemic to the Brazilian Northeast Atlantic Rainforest. Reproductively-active individuals were observed systematically and their visitors were recorded and determined. The main recorded fl oral visitors were Glaucis hirsutus, Phaethornis ruber and Phaethornis pretrei (hummingbirds) which executed frontal functional fl oral visits in which they touched the reproductive parts of the fl owers. Visits of Plebeia fl avocincta, Plebeia sp., Trigona spinipes and Euglossa cordata (bees) and Talides sergestu and Strymon ziba (butterfl ies) were also recorded. In addition, two ants (Hymenoptera, Insecta, Formicidae) were identifi ed in activity on the fl oral scapes and fl owers of the studied bromeliad. The suggestion is made in the study that the A. constantinii is pollinated by hummingbirds since these birds executed direct frontal visits to the fl owers, touching reproductive structures. The identifi cation of pollen on the bodies of bees and butterfl ies, as well as the contact executed by visitors, with the stigma of the visited fl owers, offered an indication that these species may exert an infl uence as secondary pollinators of Aechmea constantinii.

Keywords

• Biologia floral
• Phaethornis ruber
• Polinização
• Trochilidae