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: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=610706
• 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。在接下来的五年里，我的实验室将把系统发育比较方法与田间成分和适当的分子工具结合起来，研究授粉影响植物多样化的三个主要途径：