1. Beyond Habitat Selection: Physiological Responses of Species to Climate
Betsy Reardon
GEO 387H: Physical Climatology
Literature Review Presentation
Professor: Dr. Zong-Liang Yang

2. Presentation Outline Introduction to Ecology/Biogeography
Climate Envelope Models vs Mechanistic Models
Key Life History Features and Their Relationship to Climate
Conclusions

3. Introduction What is Ecology? What is Biogeography?
Species Ranges and Range Limits

4. Juniperus communis – Common Juniper

6. Introduction What is Ecology? What is Biogeography?
Species Ranges and Range Limits
Future Predictions about Range

7. Climate Envelope Model
Based on Ecological Niche Theory
Hutchinson 1957
Define Current Range
Determine Correlative Environmental Variables
Attempt to Anticipate Future Spatial of Environmental Variables
Species Track Environmental Variables

8. Climate Envelope Model
Based on either presence-absence data or abundance counts
Assume full range information with comprehensive data
Assume capturing all significant environmental variables
Attempt to not “Over-Fit” the data

10. Mahogany Jerusalem Cricket in Southern California Mahogany Jerusalem Cricket in Southern California

11. Mechanistic Model
Identify relationship between key biological events and climate
Predict physiological responses to climate change
Forecast future range boundaries

12. Key Life History Features
Migration
Sex Determination
Phenology
Reproduction

13. Migration
Triggers classically studied as either temperature or lighting variations
Suggest relationship to large-scale global climate phenomena
Ex. North Atlantic Oscillation (NAO)
Huppop and Huppop (2003)

16. Sex Determination Human sex determination is based on sex chromosomes
Most reptile sex determination is based on environmental controls

17.
2ºC shifted from normal
4ºC beyond rebound

19. Phenology Study of the timing of biological events
Use to study reaction of species to climate change
Use to anticipate shifts in ecological relationships

21. Reproduction Commonly coupled with other life history events
Reproductive success is dependent on climate

24. Conclusions
Essential links between key life history events and climate
Rate of evolution and climate change
Climate Envelop vs. Mechanistic Models