Eco-evolutionary dynamics of pollinator-driven diversification

传粉媒介驱动的多样化的生态进化动力学

• 批准号: RGPIN-2014-03891
• 负责人: Vamosi, Jana
• 金额: $ 1.75万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=667474
• 关键词: Eco; evolutionary; dynamics; pollinator; driven

Research in my lab maintains a focus on the factors responsible for the wide range in evolutionary success among angiosperm lineages, especially those influenced by pollination, and why they matter for the maintenance of contemporary ecosystems. Over the next five years, my lab will combine phylogenetic comparative approaches with field components and appropriate molecular tools to investigate three major avenues by which pollination influences plant diversification:**Theme I Range expansion, trait evolution, and diversification of plant lineages:**My lab is currently investigating the influence of range shifts and the accompanying shifts in pollinators on plant speciation. We will pair phylogenetic analyses of diversification and range in Plantaginaceae to estimate the influence of long-distance dispersal to bird pollination. At a more local scale, we are investigating how adaptation to new environments can affect pollinator composition and gene flow between populations within species of Penstemon in the Alberta Rockies. Finally, at a broader scale, we are integrating community ecology with historical biogeography in the ~130 genera where hummingbird pollination has evolved. We will construct dated phylogenies of these lineages to determine (1) what extent parallels in pollinators are commonly aligned with range expansion among members of these disparate clades and 2) whether pollinator specialization is associated with altered rates of diversification.**Theme II The influence of trait conservatism and lability in plant diversification:**The underlying genomics of traits influences the extent of trait conservatism. My lab is currently investigating the quantitative genetics of ultraviolet (UV) reflectance, a trait considered critical to the pollination success of many species, using Mimulus guttatus as a model system. This study will be extended to investigate how the underlying genetic architecture of a trait influences the rate at which it can evolve. We are conducting analyses of whether (1) the degree of stabilizing selection on a trait is associated with diversification rate and (2) whether the number of genes involved in a trait are associated with evolutionary rates.**Theme III Plant-pollinator ecophylogenetics, phylobetadiversity, and ecosystem services:**Expanding our previous work on plant phylogenetic community structure, my lab will embark on studies of plant and pollinator betadiversity in temperate and tropical locales. Higher connectance is observed in smaller networks and is associated with higher stability, indicating that specialists potentially destabilize networks and offer limited ecosystem service. We will construct phylogenies for plants and pollinators found throughout the networks, measuring the ecosystem service the pollinator community provides to the plant community in terms of seed set. Novel to this proposal, we will compare the turnover (in terms of betadiversity and phylobetadiversity) in pollinator composition in temperate versus tropical sites and test whether species turnover is associated with the summed contribution of specialists to the ecosystem function of pollination.

我的实验室的研究一直集中在被子植物谱系中广泛的进化成功的因素，特别是那些受授粉影响的因素，以及为什么它们对当代生态系统的维持很重要。在接下来的五年中，我的实验室将结合系统发育比较方法与田间成分和适当的分子工具来研究传粉影响植物多样化的三个主要途径：**主题1范围扩展，性状进化和植物谱系多样化**我的实验室目前正在研究范围变化和伴随的传粉媒介变化对植物物种形成的影响。我们将对车前花科植物的多样性和分布范围进行系统发育分析，以估计远距离传播对鸟类传粉的影响。在更局部的尺度上，我们正在研究对新环境的适应如何影响传粉者组成和阿尔伯塔落基山脉大盆草物种种群之间的基因流动。最后，在更广泛的范围内，我们正在将蜂鸟授粉进化的约130个属的群落生态学与历史生物地理学相结合。我们将构建这些谱系的系统发育，以确定(1)传粉媒介的相似程度通常与这些不同分支成员之间的范围扩展相一致；(2)传粉媒介专业化是否与改变的多样化率有关。**主题二性状保守性和不稳定性对植物多样化的影响：**性状的潜在基因组学影响性状保守性的程度。我的实验室目前正在研究紫外线（UV）反射的数量遗传学，这一特性被认为对许多物种的授粉成功至关重要，使用Mimulus guttatus作为模型系统。这项研究将扩展到研究一个性状的潜在遗传结构如何影响它的进化速度。我们正在分析(1)一个性状的稳定选择程度是否与多样化率有关，(2)一个性状中涉及的基因数量是否与进化率有关。主题三：植物-传粉者生态系统发育、系统多样性和生态系统服务：**本实验室将在植物系统发育群落结构的基础上，开展温带和热带地区植物和传粉者多样性的研究。在较小的网络中观察到更高的连通性，并且与更高的稳定性相关，这表明专家可能会破坏网络的稳定，并提供有限的生态系统服务。我们将对整个网络中发现的植物和传粉者进行系统发育，并从种子设置的角度衡量传粉者群落对植物群落提供的生态系统服务。与此建议不同，我们将比较温带和热带地区传粉者组成的转换（根据物种多样性和系统多样性），并测试物种转换是否与专家对传粉生态系统功能的总贡献有关。