Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/29766
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Nectar ecology of the endemic epiphytic hummingbird-pollinated bromeliad Vriesea altodaserrae: secretion dynamics and pollinator visitation pattern
Author(s): Nunes, Carlos E P
Briet, Joseildo
Galetto, Leonardo
Sazima, Marlies
Amorim, Felipe W.
Keywords: Bromeliaceae
nectar traits
Phaethornithinae
Trochilidae
specialized pollination system
sugar chemical composition
Issue Date: Sep-2018
Citation: Nunes CEP, Briet J, Galetto L, Sazima M & Amorim FW (2018) Nectar ecology of the endemic epiphytic hummingbird-pollinated bromeliad Vriesea altodaserrae: secretion dynamics and pollinator visitation pattern. Acta Botanica Brasilica, 32 (3), pp. 479-486. https://doi.org/10.1590/0102-33062018abb0241
Abstract: Hummingbirds are the main pollinators of most bromeliad species, whose nectar traits usually respond to the selective pressures imposed by pollinators. Considering the specialization of hummingbird-pollinated bromeliads, we expect a close relationship between nectar ecophysiology and the needs of the main pollinators. In this sense, we studied the nectar ecology of the endemic epiphytic bromeliad Vriesea altodaserrae by assessing its nectar traits to address the following questions: i) do flowers respond to successive experimental removals of nectar? ii) is hummingbird visitation frequency related to nectar secretion pattern? We found that V. altodaserrae depended completely on hummingbirds for sexual reproduction, and nectar composition was consistent with that of most hummingbird-pollinated species. Most of the nectar was secreted at bud stage and, if not removed, flowers reabsorb it at the end of their lifespan. Total nectar production did not change after successive removals, and nectar secretion rhythm did not affect the frequency of hummingbird visits. Vriesea altodaserrae was visited by two-thirds of the hummingbird species recorded at the study site, but especially by those of Trochilinae subfamily, suggesting specialization for this group of hummingbirds and highlighting the importance this endemic bromeliad as a keystone species in areas of highland Atlantic forest
DOI Link: 10.1590/0102-33062018abb0241
Rights: This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/deed.en).
Licence URL(s): http://creativecommons.org/licenses/by/4.0/

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