Bumblebee flight distances in relation to the forage landscape
Bumblebee flight distances in relation to the forage landscape
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DOI：
10.1111/j.1365-2656.2007.01333.x
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发表时间：
2008-03-01
影响因子：
4.8
通讯作者：
Sanderson, Roy A.
中科院分区：
文献类型：
--
作者：
Osborne, Juliet L.;Martin, Andrew P.;Sanderson, Roy A.
1.觅食范围是“中心觅食者”生态学的一个关键方面。估计蜜蜂在不同情况下能飞多远对于预测蜂群成功和估计蜜蜂介导的植物种群之间的基因流是必不可少的。它很可能受到饲料分布的强烈影响，除了最简单的景观之外，这是很难量化的;觅食距离的理论倾向于假设均匀的饲料分布。我们量化了熊蜂的分布。觅食远离实验定位殖民地，在农业景观，使用两种方法。我们在觅食蜂离开殖民地时大量标记它们，并分析返回蚁群的觅食蜂的花粉。这些数据是在“草料分布图”的范围内确定的：根据遥感数据确定的草料空间分布图。据我们所知，这是第一次在这种分辨率和尺度上收集和组合大黄蜂的觅食距离和饲料可用性的经验数据。蜜蜂觅食至少1.5公里，从他们的殖民地，觅食的比例飞到一个领域下降，近似线性，径向距离。在这一景观中，无论种群的位置如何，在500 m范围内，饲料的可利用性变化很大，但在1 km以外变化很小. B的比例。terrestris觅食是大到足以缓冲对饲料补丁和开花作物异质性的影响，但蜜蜂物种觅食范围较短，可能会经历高度可变的殖民地成功根据位置。
1. Foraging range is a key aspect of the ecology of 'central place foragers'. Estimating how far bees fly under different circumstances is essential for predicting colony success, and for estimating bee-mediated gene flow between plant populations. It is likely to be strongly influenced by forage distribution, something that is hard to quantify in all but the simplest landscapes; and theories of foraging distance tend to assume a homogeneous forage distribution.2. We quantified the distribution of bumblebee Bombus terrestris L. foragers away from experimentally positioned colonies, in an agricultural landscape, using two methods. We mass-marked foragers as they left the colony, and analysed pollen from foragers returning to the colonies. The data were set within the context of the 'forage landscape': a map of the spatial distribution of forage as determined from remote-sensed data. To our knowledge, this is the first time that empirical data on foraging distances and forage availability, at this resolution and scale, have been collected and combined for bumblebees.3. The bees foraged at least 1.5 km from their colonies, and the proportion of foragers flying to one field declined, approximately linearly, with radial distance. In this landscape there was great variation in forage availability within 500 m of colonies but little variation beyond 1 km, regardless of colony location.4. The scale of B. terrestris foraging was large enough to buffer against effects of forage patch and flowering crop heterogeneity, but bee species with shorter foraging ranges may experience highly variable colony success according to location.