This preview shows page 1. Sign up to view the full content.
Unformatted text preview: laughter 12 4 4/3/2013 human modiﬁcation of the landscape was
changing what the pigeon was adapted for. Forest fragmentation from historical records,
Cadiz Township, Wisconsin Green = forest, white = agriculture or town Passenger pigeon superbly adapted for this landscape, but not this one.
From Raven et al. 13 Hunting could not have done it alone:
• Nut feeder; pigeon was so successful because it beat the
predator avoidance strategy of oak and beech mast crops
• Colonial life style: allee effects likely (needed combination of habitat modiﬁcation and
human hunting eliminated the species. aggregation) • In pre settlement north America, there was always mast
• …but not after massive loss of forest and fragmentation
• Remaining flocks searching for shrinking remnants of
forest; hunters recruited by telegraph and railroad; no
predator refuge, no density dependent controls on hunters The destruction of habitat has now been
reversed, restoring their original habitat in
which they had adapted. • The irony: today’s landscape would probably prevent
extinction in New England
14 5 4/3/2...
View Full Document
This document was uploaded on 01/27/2014.
- Winter '14
- Annotated Lecture S