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Investigating bee dietary preferences along a gradient of floral resources: how does resource use align with resource availability?
Insect Science ( IF 4 ) Pub Date : 2020-06-29 , DOI: 10.1111/1744-7917.12785
Tyler T Kelly 1 , Elizabeth Elle 1
Affiliation  

Bee dietary preferences, or the floral resources that they consistently collect, likely impact where a species can persist. For this reason it is likely that bee dietary preferences are dependent upon the composition of the plant community. In this study, we evaluated floral visits and pollen loads of the mining bee, Andrena angustitarsata Viereck, across a 630 km north-south range to understand dietary preferences along a floral resource gradient. Previous research, in a more geographically limited area, suggested this species was an eclectic oligolege on predominantly Apiaceae and in part Rosaceae. In the present study we found the species predominately visited and collected pollen from Apiaceae and Rosaceae, but visited 12 flower families and collected pollen from 32, distinguishing them as generalist foragers. The frequency of Apiaceae pollen on the bees and the species-level specialization index (a measure of visit specialization) were higher in regions with higher Apiaceae abundance. In addition Apiaceae and Rosaceae were the only plant families significantly preferred for pollen collection, regardless of floral abundance. We conclude that across our study region A. angustitarsata has a generalist dietary breadth, but also has dietary preference for Apiaceae and Rosaceae. Our study indicates that while bees may overall make generalist foraging decisions they may still prefer and likely benefit from selecting fewer flower taxa. This article is protected by copyright. All rights reserved.

中文翻译:

沿着花卉资源的梯度调查蜜蜂的饮食偏好:资源利用如何与资源可用性保持一致?

蜜蜂的饮食偏好,或者它们持续收集的花卉资源,可能会影响一个物种的生存地点。出于这个原因,蜜蜂的饮食偏好很可能取决于植物群落的组成。在这项研究中,我们评估了矿蜂 Andrena angustitarsata Viereck 在南北 630 公里范围内的花卉访问和花粉负荷,以了解沿花卉资源梯度的饮食偏好。先前在地理上更有限的区域进行的研究表明,该物种是主要为伞形科和部分蔷薇科的折衷寡核苷酸。在本研究中,我们发现该物种主要访问和采集伞形科和蔷薇科的花粉,但访问了 12 个花科并从 32 个采集花粉,将它们区分为多面手。在伞形科丰度较高的地区,蜜蜂上伞形科花粉的频率和物种水平专业化指数(访问专业化的衡量标准)更高。此外,伞形科和蔷薇科是唯一显着偏爱花粉收集的植物科,无论花的丰度如何。我们得出结论,在我们的研究区域中,A. angustitarsata 具有广泛的饮食广度,但也有对伞形科和蔷薇科的饮食偏好。我们的研究表明,虽然蜜蜂总体上可能会做出多面手的觅食决定,但它们可能仍然更喜欢,并且可能会从选择较少的花卉类群中受益。本文受版权保护。版权所有。此外,伞形科和蔷薇科是唯一显着偏爱花粉收集的植物科,无论花的丰度如何。我们得出结论,在我们的研究区域中,A. angustitarsata 具有广泛的饮食广度,但也有对伞形科和蔷薇科的饮食偏好。我们的研究表明,虽然蜜蜂总体上可能会做出多面手的觅食决定,但它们可能仍然更喜欢,并且可能会从选择较少的花卉类群中受益。本文受版权保护。版权所有。此外,伞形科和蔷薇科是唯一显着偏爱花粉收集的植物科,无论花的丰度如何。我们得出的结论是,在我们的研究区域中,A. angustitarsata 具有广泛的饮食广度,但也对伞形科和蔷薇科有饮食偏好。我们的研究表明,虽然蜜蜂总体上可能会做出多面手的觅食决定,但它们可能仍然更喜欢,并且可能会从选择较少的花卉类群中受益。本文受版权保护。版权所有。我们的研究表明,虽然蜜蜂总体上可能会做出多面手的觅食决定,但它们可能仍然更喜欢,并且可能会从选择较少的花卉类群中受益。本文受版权保护。版权所有。我们的研究表明,虽然蜜蜂总体上可能会做出多面手的觅食决定,但它们可能仍然更喜欢,并且可能会从选择较少的花卉类群中受益。本文受版权保护。版权所有。
更新日期:2020-06-29
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