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SUMMARY:Global vegetation responses to deer: ecosystem changes and recover
 y - Andrew Tanentzap
DTSTART:20100611T120000Z
DTEND:20100611T123000Z
UID:TALK23964@talks.cam.ac.uk
CONTACT:15560
DESCRIPTION:Large mammalian herbivores have reached such high densities in
  many temperate regions that culling is frequently used to reduce their im
 pacts on vegetation. However\, little is known about the long-term respons
 es of ecosystems to landscape-level reductions in herbivore densities. The
  responses of ecosystems to herbivore removal may have important implicati
 ons for global carbon sequestration in plant biomass. I use long-term perm
 anent monitoring plots to compare the effects of deer\n(Cervidae) culling 
 on vegetation change in New Zealand\, Canada\, and England\, in order to p
 redict whether ecosystems can recover from deer-disturbance. Forest simula
 tion models provide an important tool for predicting the outcomes of deer 
 management and I develop a spatially explicit forest simulation model to p
 redict the spread of upland birchwoods in the central Scottish Highlands i
 n response to deer browsing pressures. \n\nMy results suggest that even lo
 w deer densities may restrict vegetation recovery\, and therefore\, restor
 ing herbivore-disturbed ecosystems may not only require patience but a ran
 ge of active management strategies.
LOCATION:Department of Plant Sciences\, Large Lecture Theatre
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