Extinction

1
Extinction
2
(No Transcript)
3
(No Transcript)
4
(No Transcript)
5
Coring Glacial Ice
6
Ice Core Data
7
Pollen core data collection
8
Pollen Core Data
9
Distribution of North American Trees in past
16,000 years
10
Black-tailed prairie dog
11
Northern bog lemming
12
Eastern chipmunk
13
Global Ice Coverage Last Ice Age
14
Rainforests in a. Glacial period, b.
Inter-glacial period
15
Global carbon cycle
16
Carbon dioxide concentration at Mauna Loa
17
(No Transcript)
18
Model projections of global temperature change
19
Current distributions of biomes
20
Predictions for biomes after global warming
21
The Earth Ice Free
22
Global Ice Coverage Last Ice Age
23
Will species be able to survive current climate
change?

• Maybe
• Maybe not

24
Pikas may run out of mountaintop
25
What makes species vulnerable to extinction?
The dodo
26
(No Transcript)
27
Passenger pigeon
28
Passenger pigeon
29
Allee Effect

• Some species have a minimum requirement for
  population size in order to successfully breed

30
Characteristics that predispose species to
becoming extinct

• 1. habitat overlap - the species occupy habitat
  that is desirable to humans and lose out in
  competition with humans for the habitat -
  tallgrass prairie species
• 2. human attention - species suffer because
  singled out by humans - either desired as food or
  fur and hunted heavily (passenger pigeon, dodo,
  northern elephant seal) or disliked by humans
  and killed as varmints (wolves, African wild
  dogs)
• 3. large home range requirements - animals
  needing large areas cant find large enough areas
  in human dominated landscape - California condor
• 4. limited adaptability and resilience - Pacific
  salmon return to natal stream to reproduce wont
  go elsewhere

31
Konza Prairie Kansas
32
African wild dog
33
California condor
34
Coho salmon
35
Salmon Life Cycle
36
Salmon support 137 species
37
(No Transcript)
38
(No Transcript)