In Brazilian savannas, stingless bees are associated with yeast communities composed mainly of Starmerella species. This study aimed to establish the distribution of yeasts associated with the bee species Frieseomelitta varia, Scaptotrigona aff. postica, Scaptotrigona polysticta, Tetragonisca angustula angustula, Melipona compressipes manaosensis and Melipona scutellaris in northern savannas and the importance of yeasts in the resource partitioning of bees. We collected 380 bees from six species, which were individually placed in Petri plates containing rich medium for 15 min. Yeasts were then isolated, resulting in the identification of 54 species, 48 of which were ascomycetous, while six were basidiomycetous. Torulaspora delbrueckii was the most frequently isolated yeast species in this study, followed by Pichia membranifaciens, Starmerella apicola, Pichia kluyveri, Starmerella meliponinorum and Starmerella bombicola. The total number of Starmerella species identified showed that these species are prevalent in association with these stingless bees. These communities differ from stingless bee-associated yeasts found in the southern savannas of Brazil. Although stingless bees are generalist foragers, there are some yeasts showing high prevalence in only one bee species, resulting in differences in niche breadth that may point to a role of yeasts in the resource partitioning of bees in Brazilian savannas.

在巴西大草原中，无刺蜜蜂与主要由Starmerella菌种组成的酵母群落有关。这项研究旨在建立与蜜蜂物种Frieseomelitta varia，Scaptotrigona aff相关的酵母的分布。postica，多裂藻（Scaptotrigona polysticta），八角藻（Tetragonisca angustula angustula），墨西哥墨刀锦man和黄Me在北部热带稀树草原中，酵母在蜜蜂资源分配中的重要性。我们从六个物种中收集了380只蜜蜂，将它们分别放入含有丰富培养基的培养皿中放置15分钟。然后分离酵母，鉴定出54种，其中48种为子囊菌，而6种为担子菌。孢圆酵母德氏在这项研究中最常见的孤立酵母菌种，其次是毕赤酵母 membranifaciens，Starmerella apicola，克鲁维毕赤酵母，Starmerella meliponinorum和Starmerella 丝酵母菌。Starmerella的总数鉴定出的物种表明这些物种与这些无刺蜜蜂有关。这些社区不同于在巴西南部热带稀树草原发现的无刺蜂相关酵母。尽管无刺蜜蜂是通才的觅食者，但仍有一些酵母菌仅在一种蜜蜂中显示较高的流行率，导致利基宽度的差异，这可能表明酵母菌在巴西热带稀树草原的蜜蜂资源分配中发挥了作用。