1 / 23

Ecological Niches of Three Jay Species in North America

Ecological Niches of Three Jay Species in North America. Kevin Bracy Knight Jenna McAleer. Our subjects…. Steller’s Jay ( Cyanocitta stelleri ) Blue Jay ( Cyanocitta cristata ) Western Scrub-Jay ( Aphelocoma californica ). animaldiscovery-chanel.blogspot.com. sportsyakima.com.

viveca
Download Presentation

Ecological Niches of Three Jay Species in North America

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. Ecological Niches of Three Jay Species in North America Kevin Bracy Knight Jenna McAleer

  2. Our subjects… • Steller’s Jay (Cyanocittastelleri) • Blue Jay (Cyanocittacristata) • Western Scrub-Jay (Aphelocomacalifornica) animaldiscovery-chanel.blogspot.com sportsyakima.com calliebowdish.com

  3. Known Distributions Blue Jay

  4. Known Distributions Blue Jay & Steller’s Jay

  5. Known Distributions Blue Jay, Steller’s Jay and Western Scrub Jay

  6. Detailed view of Colorado overlap

  7. Phylogenetic Relationships De Los Monteros & Cracraft 1997

  8. Phylogenetic Relationships Bonaccorso & Peterson 2007

  9. Western Scrub Jay Point Distribution vs. Range Map

  10. Our questions Can we discern the ecological niches of these three Jay species? a. What climatic or environmental factors are likely contributing to their current distribution patterns? b. How are their ranges likely to change in the future?

  11. Methods • Known distributions from ORNIS2 • Edit/clean up data to include only NA localities (.csv) • Range maps from Nature Serve • Current & future climatic data from Bioclim (.asc) • Run MaxEnt to generate niche models • Map in QGIS

  12. MaxEnt Results Western Scrub Jay Bio 3 = isothermality (diurnal range (weekly diff. b/w max and min temp)/annual temp range Bio 1= annual mean temp Bio 19 = precip of coldest quarter Bio 18 = precip of warmest quarter

  13. Western Scrub Jay Niche Model

  14. Western Scrub Jay Niche Model Validation

  15. Western Scrub Jay Niche Model

  16. MaxEnt Results Blue Jay Bio 1 = annual mean temp Bio 4 = temperature seasonality Bio 18 = precip of warmest quarter Bio 15 = precip seasonality

  17. Blue Jay Niche Model

  18. MaxEnt Results Steller’s Jay Bio 1= annual mean temp Bio4 = temperature seasonality Bio3 = isothermality 2/7 (diurnal range (weekly diff. b/w max and min temp)/annual temp range Bio19 = precip of coldest quarter

  19. Steller’s Jay Niche Model

  20. Steller’s Jay Future Loss of Habitat

  21. Future predicted increase in niche overlap betweenBlue Jays and Western Scrub Jays (2080s)

  22. Future predicted niche overlap increase between Western Scrub Jay and Steller’s Jay (2080s)

  23. Future research… • Compare our data with niche models for past geographic distributions of each species • Generate and compare niche models for vegetation

More Related