1 / 14

Distributions of C 3 and C 4 Plants

Distributions of C 3 and C 4 Plants. Travis Wicks. What are C 3 /C 4 Plants?. Different photosynthetic pathways. C 3 -C 4 Examples. C 3. C 4. Treesdirect.co.uk. Scientificamerican.com. Kaupag.com. En.wikipedia.org. Most plants. Warm-season grasses. Influences on Distribution.

osias
Download Presentation

Distributions of C 3 and C 4 Plants

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Distributions of C3 and C4 Plants Travis Wicks

  2. What are C3/C4 Plants? Different photosynthetic pathways

  3. C3-C4 Examples C3 C4 Treesdirect.co.uk Scientificamerican.com Kaupag.com En.wikipedia.org Most plants Warm-season grasses

  4. Influences on Distribution • Temperature • CO2 concentration • Precipitation patterns • Light intensity

  5. Goals Modern C4 Distribution Compare with: • Koch et al. (2004) • Still and Powell (2010)

  6. Models Koch et al. (2004) • Based on regressions on modern distributions • Purely climate-based • Inputs: • mean annual temperature • mean annual precipitation • mean summer precipitation

  7. Koch Results

  8. Models Still and Powell (2010) • Climate aspect based on experimental data • MODIS and Global Land Cover (GLC) vegetation data included • Eliminates problem of plant physiology distributions • Inputs: • Mean monthly precipitation • Mean monthly temperature • MODIS % herbaceous layer • Global Land Cover Map 2000

  9. Still and Powell Results

  10. Still and Powell Results Without GLC With GLC

  11. Still and Powell (non-GLC) Results

  12. Intermodel comparison Mean difference: 0.17 Mean difference: 0.20

  13. Conclusions • Both models have their respective problems • Hybridize the two • Other possible factors: • Fire regime • Herbivores • Are the systems truly in equilibrium? • Natural variability

  14. The End! Thanks to: -Gonzalo Espinoza -Dr. Maidment -You, for listening

More Related