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Plant-hummingbird interactions and temporal nectar availability in a restinga from Brazil
Lorena C N Fonseca1, Jeferson Vizentin-Bugoni2, André R Rech3
1Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Anais Da Academia Brasileira De Ciencias
|December 3, 2015
Summary
Hummingbird pollination in Brazil
Area of Science:
- Ecology
- Ornithology
- Botany
Background:
- Hummingbirds are vital pollinators in Neotropical ecosystems.
- Plant-hummingbird interactions are crucial for community structure.
- Restinga vegetation in Brazil hosts specialized ecological relationships.
Purpose of the Study:
- To identify plants visited by hummingbirds in a Brazilian restinga ecosystem.
- To investigate the temporal dynamics of floral resource availability.
- To assess the energetic contribution of nectar resources to hummingbird populations.
Main Methods:
- Field observations of hummingbird-plant interactions.
- Recording of floral traits and nectar characteristics.
- Phenological monitoring of flowering plants.
- Estimation of daily caloric availability per hectare.
Main Results:
- Ten plant species were utilized by two hummingbird species: Amazilia fimbriata and Eupetomena macroura.
- Nectar volume and concentration were comparable to other Neotropical sites.
- Estimated daily nectar resources per hectare varied significantly, requiring 1-6.8 hectares to sustain one hummingbird.
- A. fimbriata dominated interactions, a unique finding for this tropical setting.
Conclusions:
- Variable nectar availability likely influences hummingbird foraging behavior and movement patterns.
- This resource variability may impact pollination services provided by hummingbirds.
- The dominance of a single hummingbird species in interactions presents an unusual ecological scenario.
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