Facts
Time: 2020-10-27 13:00
City: Uppsala and Zoom
City: Uppsala and Zoom
27
Oct
Uppsala and Zoom
Evolutionary Ecology of Floral Traits in Fragrant Orchids
Why are flowers so diverse? Much of floral evolution is thought to be driven by pollinator-mediated selection, however the connection between macroevolutionary patterns of floral diversity and microevolutionary processes remains poorly understood.
Seminar by Elodie Chapurlat, postdoctor at the Department of Ecology, SLU.
More information:
In my PhD thesis, I have used the fragrant orchids Gymnadenia conopsea s.s. and Gymnadenia densiflora to investigate the role of pollinators as agents of selection on floral traits and to test whether they cause spatial variation in selection. I will present the results of my PhD where I used phenotypic selection studies and manipulation of the pollination environment to address the following questions (1) Is there divergent selection on flowering phenology and floral traits between these two closely related species? (2) What is the contribution of pollinators relative to other selective agents to selection on phenology, visual display, floral scent and spur length? (3) Do diurnal and nocturnal pollinators mediate different selection patterns? (4) Does spatial variation in pollinator communities cause spatial variation in selection? Taken together, my results support the hypothesis that pollinators cause spatial variation in selection on floral traits. They also highlight the importance of experimentally identifying sources of selection to reveal conflicting and reinforcing selection by multiple agents and thus advance our understanding of the evolutionary ecology of floral traits.
All are most welcome to attend via Zoom: https://slu-se.zoom.us/j/64558050512
NB! Due to COVID restrictions, only a limited audience is allowed (16 persons) in Tammsalen on a first come basis (please register at: https://doodle.com/poll/8vappx3m7z9fb378)