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Pollen specialists are more endangered than non-specialised bees even though they collect pollen on flowers of non-endangered plants
Arthropod-Plant Interactions ( IF 1.6 ) Pub Date : 2020-10-21 , DOI: 10.1007/s11829-020-09789-y
Petr Bogusch , Eliška Bláhová , Jakub Horák

Non-parasitic bees differ in the degree of their taxonomic specialisation for pollen collection to feed their brood. Surveys of published data on pollen specialisation by bees of central Europe showed that about two-thirds of species are pollen generalists (polylectic) while the remainder only collect pollen of one family, genus or species (monolectic and oligolectic). Proportions of monolectic and oligolectic species among bee families and genera in central Europe varies widely, from the entirely pollen-specialised but small family Melittidae, to the mostly polylectic Halictidae and Apidae. The Asteraceae plant family attracts the most monolectic and oligolectic species, followed by Fabaceae, Brassicaceae and Campanulaceae. Several plant families in central Europe host only a single bee species. Of the species included in the Red List of bees of Czechia, oligoleges are proportionally more strongly represented than polyleges. Most of these red-listed oligoleges are associated with specific and regionally endangered habitats, i.e. steppes or wetlands. Most of the bees are more limited by the presence of their habitat or nesting site than by the host plant, although this fact is not simple to evaluate due to the incomplete data on the floral relations and distribution of bee species.



中文翻译:

尽管花粉专家会在非濒危植物的花朵上采集花粉,但他们比非专业蜜蜂面临的威胁更大。

非寄生蜂的分类专业化程度不同,用于收集花粉来喂养它们的雏鸟。对中欧蜜蜂有关花粉专业化的已公开数据的调查显示,大约三分之二的物种是花粉通才(多电的),而其余的仅收集一个科目,属或物种的花粉(单性和低聚)。在中欧的蜜蜂科和属中,单向性和寡聚性物种的比例差异很大,从完全是花粉专长的小型Mel科(Melittidae)到大多为杂种的Halictidae和Apidae。菊科植物家族吸引了最多的单向性和寡聚性物种,其次是Fabaceae,Brassicaceae和Campanulaceae。欧洲中部的几个植物科只有一种蜂。在德意志蜜蜂红色名录中列出的物种中,寡头动物比多头动物更具代表性。这些列入红色名单的寡妇大多数与特定的区域性栖息地(即草原或湿地)有关。大多数蜜蜂受其栖息地或筑巢地点的限制比受寄主植物的限制更大,尽管由于有关蜜蜂的花系关系和分布的数据不完整,这一事实很难评估。

更新日期:2020-10-30
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