Rewarding plants can enhance the pollination success of co-occurring plants pollinated by food mimicry. However, it is not always possible to readily discern between the effect of model and magnet species. Here, we tested for mimicry of co-occurring Fabaceae by the rewardless Diuris magnifica (Orchidaceae) and whether the number of flowers of Fabaceae, habitat remnant size and frequency of conspecifics, influenced the pollination success of D. magnifica. Trichocolletes bees were the primary pollinators of D. magnifica, on which they displayed similar behaviour as seen when feeding on Fabaceae. Quantification of spectral reflectance suggested that flowers of Bossiaea eriocarpa, Daviesia divaricata and Jacksonia sternbergiana may represent models for D. magnifica, whereas Hardenbergia comptoniana strongly differed in colour. Orchid pollination success was not directly affected by the number of model flowers, but the pollination rate was enhanced by increased numbers of Hardenbergia flowers. Pollination success of the orchid decreased with higher density of conspecifics, but did not exhibit a significant relationship with Trichocolletes occurrence, possibly because of the contribution of sub-optimal pollinator species. Fruit set of the orchid was greater in larger habitat remnants. Overall, pollination success of D. magnifica is affected by ecological factors related to the effectiveness of mimicry, numbers of co-flowering plants and anthropogenic landscape alteration.

中文翻译：

---

模仿一系列豆科的兰花中授粉成功的生态因素

奖励植物可以增强通过食物模仿授粉的同时发生植物的授粉成功。然而，并非总是可能容易地区分模型和磁体种类的影响。在这里，我们通过无奖励的Diuris magnifica（兰科）对共生Fabaceae的拟态进行了测试，并测试了Fabaceae的花数，栖息地残余大小和物种的频率是否影响了D. magnifica的授粉成功。毛滴虫蜜蜂是D. magnifica的主要传粉者，在它们身上表现出与以豆科动物为食时相似的行为。光谱反射率的定量表明，波斯尼亚的花朵，Daviesia divaricata和Jacksonia sternbergiana可能代表了D. magnifica的模型，而Hardenbergia comptoniana的颜色差异很大。兰花的授粉成功率不受模型花数量的直接影响，但是哈登贝格花数量的增加提高了授粉率。兰花的授粉成功随着同种异体密度的增加而降低，但与毛癣菌的发生没有显着关系，这可能是由于次佳传粉物种的贡献。兰花的坐果在较大的栖息地残留物中更大。总体而言，壮丽D的授粉成功 受与模仿效果，共花植物数量和人为景观改变有关的生态因素的影响。