The most effective pollinator principle applies to new invasive pollinators
The most effective pollinator principle applies to new invasive pollinators
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DOI：
10.1098/rsbl.2018.0132
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发表时间：
2018-06-01
期刊：
影响因子：
3.3
通讯作者：
Ehrenfeld, Mildred
中科院分区：
文献类型：
--
作者：
Medel, Rodrigo;Gonzalez-Browne, Catalina;Ehrenfeld, Mildred
G. L. Stebbins的最有效传粉者原则指出，当传粉者不受限制时，植物有望专门化并适应最丰富和最有效的传粉者物种。在这项研究中，我们量化的有效性蜜蜂，蜂鸟和天蛾在智利人口的Erythranthe lutea（Phrymaceae），并检查是否花性状的传粉媒介介导的选择最有效的传粉者物种在连续两年。与大多数物种的传粉者社区，最近到达的熊蜂terrestris的访问率没有发生实质性的变化，这与它的高和稳定的花粉传递到花柱头使这个物种的传粉者组合中最重要的，其次是孤独的蜜蜂Centris nigerrima。花部性状在短舌蜂的预期方向上受到显著选择，表明E。lutea正处于适应高效外来大黄蜂的初始阶段。我们的研究结果说明了Stebbins的原则适用于新的入侵传粉者，并强调其重要性，在驱动本地植物物种的花适应，在面对生物交换和同质化的一个关键问题。
G. L. Stebbins' most effective pollinator principle states that when pollinators are not limiting, plants are expected to specialize and adapt to the most abundant and effective pollinator species available. In this study, we quantify the effectiveness of bees, hummingbirds and hawkmoths in a Chilean population of Erythranthe lutea (Phrymaceae), and examine whether flower traits are subject to pollinator-mediated selection by the most effective pollinator species during two consecutive years. Unlike most species in the pollinator community, the visitation rate of the recently arrived Bombus terrestris did not change substantially between years, which together with its high and stable pollen delivery to flower stigmas made this species the most important in the pollinator assemblage, followed by the solitary bee Centris nigerrima. Flower traits were under significant selection in the direction expected for short-tongue bees, suggesting that E. lutea is in the initial steps of adaptation to the highly effective exotic bumblebee. Our results illustrate the applicability of Stebbins' principle for new invasive pollinators, and stress their importance in driving flower adaptation of native plant species, a critical issue in the face of biotic exchange and homogenization.