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SUMMARY:Birdsong and the Environment: How to Speed Up Evolution - Caroline
  Dingle\, Zoology Department
DTSTART:20051130T123000Z
DTEND:20051130T133000Z
UID:TALK4503@talks.cam.ac.uk
CONTACT:Ryan Prescott Adams
DESCRIPTION:The astonishing biodiversity found in tropical regions is the 
 result of natural selection and speciation.  In order for speciation to oc
 cur\, reproductive isolation is needed\, which is thought to occur most co
 mmonly when populations become isolated by a  physical barrier\, such as a
  mountain range or a large river system\, preventing populations on either
  side from interbreeding.  However\, evidence is accumulating that speciat
 ion can occur in the absence of a physical barrier despite ongoing gene-fl
 ow between subpopulations of a species. This could happen either due to st
 rong environment-based natural selection across ecological gradients or as
  a result of changes in behavioural traits which prevent adjacent groups f
 rom recognizing each other as the same species\, thus resulting in a pre-m
 ating barrier to gene-flow.  In this seminar\, I will present some results
  from my studies in which I have used a combination of genetic\, behaviour
 al and ecological studies to test hypotheses regarding speciation in the t
 ropics and to determine whether or not the process of speciation can indee
 d be influenced by the environment.
LOCATION:Room 911\, Cavendish Laboratory
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