Bees collecting pollen from flowers with poricidal anthers in a south Brazilian Araucaria forest: a community study

摘要: SUMMARYA community study of bees visiting flowers with poricidal anthers was made in the subtropical Araucaria forest region Rio Grande do Sul, Brazil. Bees 79 species, representing about 40% taxa occurring at site, were collected on 19 species flowering plants families Melastomataceae and Solanaceae. The majority flower visitors able to buzz (sonicate) release pollen. Buzzing is thought be only mode pollen collection that results pollination. No oligolectic bee-plant relation based pollination detected. Most not specialized forage anthers. According abundance specific flowers, three major groups pollinators could distinguished; these bumble bees, stingless genus Melipona halictid bees. sources mainly exploited by them differ structure, syndrome stratum. Therefore, structure t...