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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-5356
DTSTART:20200218T180500Z
DTEND:20200218T190000Z
DTSTAMP:20260317T064110Z
LAST-MODIFIED:20200205T230428Z
LOCATION:4274 Chamberlin (refreshments will be served)
SUMMARY:Drivers of megadiversity in the orchids\, the largest family o
 f flowering plants\, Chaos & Complex Systems Seminar\, Tom Givnish\, U
 W Department of Botany
DESCRIPTION:Orchids are the most diverse family of angiosperms\, with 
 more species than mammals\, birds\, and reptiles combined. Many ideas 
 have been advanced to account for their extraordinary diversity\, but 
 they have – until quite recently – been impossible to test because
  we lacked a good phylogeny (family tree) for the orchids. My colleagu
 es and I have now developed a well-resolved phylogeny for the orchids\
 , based on large numbers of chloroplast genes\, and I will show how we
  can use this phylogeny to identify the age and place of origin of the
  orchids\, assess the role of different orchid traits in driving high 
 rates of speciation\, and reconstruct the geographic spread of orchids
  across the planet. I will also describe some of the remarkable aspect
 s of the ecology of this endlessly fascinating group that have recentl
 y come to light\, mention some of the notable aspects of orchid divers
 ity in Wisconsin\, and sketch some interesting scientific and conserva
 tion issues that should be explored in the future.
URL:https://www.physics.wisc.edu/events/?id=5356
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