Generalist Behavior Describes Pollen Foraging for Perceived Oligolectic and Polylectic Bees
Generalist Behavior Describes Pollen Foraging for Perceived Oligolectic and Polylectic Bees
复制标题
通才行为描述了感知寡聚和多聚蜜蜂的花粉觅食
DOI：
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发表时间：
2016
影响因子：
1.7
通讯作者：
Shalene Jha
中科院分区：
文献类型：
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作者：
Alan D. Ritchie;Rebecca Ruppel;Shalene Jha
摘要本土蜜蜂为世界各地的栽培和野生植物提供重要的授粉服务。尽管需要保护传粉者，但对本土蜜蜂的觅食模式知之甚少。资源利用的经典概念通常根据访花模式将蜜蜂物种分类为专家或多面手。虽然蜜蜂觅食的种内变化可能取决于当地的土地利用，性别和物候期等因素，这些潜在的驱动因素很少明确调查。在这项研究中，我们探讨了潜在的种间和种内变化的花访调查的花粉负荷的两个孤独的，类似大小的，地面筑巢的本地蜜蜂种内的蜜蜂，Melissodes tepaneca（Cresson）和Diadasia rinconis（Cockerell），分类为多面手和专家根据过去的花访研究，分别。我们的分析揭示通才觅食，并表明，自然栖息地的可用性显着驱动花粉负载组成这两个物种。公认的专家，D。rinconis的花粉量组成在雌雄间、盘采法和网采法之间以及不同物候期之间存在显著差异。公认的多面手M. tepaneca，表现出显着差异的花粉负载组成之间的性别，但仅在后期的季节。这两个物种表现出显着的偏好水平，多个本地植物物种在整个研究区域。鉴于花粉收集是必不可少的本地蜜蜂种群的持久性在自然和人类占主导地位的栖息地，我们的研究结果建议考虑花粉收集和花卉访问模式，从整体上描述花卉的使用和制定传粉者保护策略。
Abstract Native bees provide essential pollination services to cultivated and wild plants worldwide. Despite the need to conserve pollinators, the foraging patterns of native bees are poorly understood. Classic concepts of resource use have typically categorized bee species as specialists or generalists based on floral visitation patterns. While intraspecific variation in bee foraging likely depends on local land use, sex, and phenological period, among other factors, these potential drivers of floral visitation are rarely explicitly investigated. In this study, we explore the potential for inter- and intra-specific variation in floral visitation by investigating the pollen loads of two solitary, similarly sized, ground-nesting native bee species within the Apinae, Melissodes tepaneca (Cresson) and Diadasia rinconis (Cockerell), categorized as generalist and specialist based on past floral visitation studies, respectively. Our analyses reveal generalist foraging and indicate that natural habitat availability significantly drives pollen load composition for both species. The putative specialist, D. rinconis, exhibited significant differences in pollen load composition between males and females, between pan and net collection methods, and between the different phenological periods. The putative generalist, M. tepaneca, exhibited significant differences in pollen load composition between the sexes, but only in the late season. Both species exhibited significant preference levels for multiple native plant species across the study region. Given that pollen collection is essential for native bee population persistence across natural and human-dominated habitats, our findings suggest consideration of both pollen collection and floral visitation patterns to holistically describe floral usage and develop pollinator conservation strategies.