Dissertation Research: Mainland vs. California Channel Island Pollination Biology of Two Hummingbird-pollinated Plants: Native Epilobium Canum and Non-native Nicotiana glauca

[00:72951]虽然我们知道植物可以对传粉媒介的选择做出反应，而且对许多植物来说，传粉媒介对成功繁殖至关重要，但我们尚不清楚a)传粉媒介在自然界中对特定植物的高时空变化如何导致我们今天看到的花性状多样性的选择，也不清楚b)植物将如何应对当前的“传粉危机”。本研究旨在阐明在传粉媒介自然变化的情况下，传粉媒介如何影响植物的成功和进化。这将通过使用一个新的研究地点、系统和研究方法的组合来测试假定和假设的大陆植物在岛屿上定居的后果来实现。将比较大陆和岛屿植物种群的传粉生物学，并确定繁殖成功的模式如何取决于传粉者的组成和频率，以及研究种群的花和繁殖保证性状。这将对两种蜂鸟传粉的植物物种——一种是本地的（Epilobium canum），一种是广泛入侵的（Nicotiana glauca）——分别进行处理，它们已经在加利福尼亚海峡群岛定居。

0072951RathckeAlthough we know that plants can respond to selection by pollinators and that for many plants pollinators are critical to successful reproduction, it is not clear a) how high spatio-temporal variation in the pollinators to a given plant in nature can lead to selection of the diversity of floral traits we see today, nor b) how plants will respond to the current "pollination crisis." The purpose of the proposed research is to provide clarification of how plants may be affected in terms of success and evolution by pollinators under a natural situation of pollinator change. This will be achieved by testing the assumed and hypothesized consequences of island colonization for plants from the mainland, using a novel study site, system and combination of research approaches. The pollination biology of plant populations will be compared between mainland and island sits, and it will be determined how patterns in reproductive success depend on the composition and frequency of pollinators and floral and reproductive-assurance traits of study populations. This will be done for each of two hummingbird-pollinated plant species - a native (Epilobium canum) and a widespread invasive (Nicotiana glauca) - that have colonized the California Channel Islands.