Resumo. Este trabalho teve como objetivo avaliar a influência diária dos fatores ambientais e da quantidade de néctar na frequência de forrageio de abelhas em flores de Adenocalymma bracteatum (Cham.) DC. Para isso, foi demarcada uma área focal e registrada a atividade de forrageio das abelhas em um intervalo de 30 minutos para cada hora, das 6:00 às 17:30 h, nas flores da referida espécie vegetal durante quatro dias não consecutivos. Também foi avaliada a produção acumulativa de néctar e o seu consumo pelos visitantes no decorrer do dia. Dados referentes à temperatura, umidade relativa do ar, luminosidade e velocidade do vento foram anotados no início de cada hora. Para verificar se as frequências de forrageios das espécies de abelhas estavam correlacionadas com os fatores abióticos, foram realizados testes de correlação de Pearson. Dentre as espécies registradas, Oxaea flavescens Klug apresentou o maior número de forrageios. O número de forrageio no decorrer do dia não se manteve uniforme, o que faz acreditar que a atividade de forrageio das abelhas sofreu interferência dos fatores ambientais e da quantidade de néctar presente nas flores de A. bracteatum. Os polinizadores efetivos foram responsáveis por 51,6% do total de visitas por flor em A. bracteatum, enquanto os pilhadores de recursos perfizeram 33,1% e os furtadores de recursos realizaram somente 15,3% do total de visitas por flor. Houve ainda, forrageios de formigas e moscas. As formigas sugavam néctar extrafloral, possivelmente conferindo proteção contra pilhagem de néctar. Já as moscas pousavam na corola, mas não extraíram néctar nem pólen. Palavras-chave:Abelha; Furto/Pilhagem de néctar; Mamangavas; Polinizadores. Abstract. This study aimed to evaluate the daily influence of environmental factors and the amount of nectar in the foraging frequency of bees on flowers Adenocalymma bracteatum (Cham.) DC. For this, a focal area was demarcated and registered foraging activity of bees in a 30-minute break for every hour from 6:00 a.m. to 5:30 p.m., in the flowers of this plant species during four non-consecutive days. Also was analyzed the nectar production and its consumption by visitors throughout the day. Data relating to temperature, relative humidity, luminosity, and wind speed were recorded at the beginning of each hour. To check if the frequencies of foraging the bee species were correlated with abiotic factors, tests of Pearson correlation were performed. Among the species recorded, Oxaea flavescens Klug had the highest number of foraging. The number of foraging during the day did not remain uniform, which makes to believe that foraging activity of bees suffered interference from environmental factors and the amount of nectar present in flowers of A. bracteatum. The effective pollinators were responsible for 51.6% of total visits per flower in A. bracteatum, while the robber's resources totaled 33.1%, and only 15.3% of all visits were made by thieves' resource. There was also foraging of ants and flies. Nectar present around the flower was sucked by...
Considering the important roles of pollinators in ecosystem services, their identification and studies of their behavior would be extremely important to efforts directed towards their preservation and management. With the aim of examining the diversity and behavior of the floral visitors to Campomanesia adamantium (Cambessédes) O. Berg (“guavira”) and how they act in the pollination process, a total of 31 species belonging to the orders Hymenoptera (79.30 %), Coleoptera (11.34 %), Diptera (9.1 %), and Hemiptera (0.24 %) were identified. Among the Hymenoptera, africanized Apis mellifera, Brachygastra lecheguana, and Trachymyrmex sp. were considered dominant. Foraging was most intense between 07:00 and 10:00 h, with decreased activity after 13:00 h. The insects visited the plants in search of pollen and nectar, with pollen being the principal resource offered. Among the pollinators, africanized Apis mellifera stood out due to their behavior, frequency of visitation, abundance (being responsible for 53.24 % of all floral visits), and their constant presence on C. adamantium flowers during the entire observation period. Other insects (wasps, ants, and coleopterans) were associated with floral tissue predation.
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