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Beyond Habitat Selection: Physiological Responses of Species to Climate

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Beyond Habitat Selection: Physiological Responses of Species to Climate

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  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. http://www.conifers.org/cu/ju/communis

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

  6. 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

  7. 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

  8. http://www.ecologyandsociety.org/vol4/iss1/art1/figure2

  9. http://www.bio.sdsu.edu/eb/avanderg/pitfall_locations2.jpg

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

  11. Key Life History Features • Migration • Sex Determination • Phenology • Reproduction

  12. 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)

  13. http://www.bird-friends.com/pics/BlackThroatedBlueWarbler

  14. http://www.fws.gov/arrowwood/pothole.html

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

  16. 2ºC shifted from normal • 4ºC beyond rebound http://i1.treknature.com/

  17. http://www.parkerriver.org

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

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

  20. http://www.naturcymru.org.uk

  21. http://www.marksphotos.nuttybird.net

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