1 / 17

Dynamic landscapes driving diversity

Dynamic landscapes driving diversity. T. Janzen, R.S . Etienne Community and Conservation Ecology Group University of Groningen. Picture courtesy Jen Reynolds. Dynamic landscapes & diversity. Diversity mainly driven by speciation Sympatric speciation Allopatric speciation

orien
Download Presentation

Dynamic landscapes driving diversity

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. Dynamic landscapes driving diversity T. Janzen, R.S. Etienne Community and Conservation Ecology GroupUniversity of Groningen Picture courtesy Jen Reynolds

  2. Dynamiclandscapes & diversity • Diversitymainlydrivenbyspeciation • Sympatricspeciation • Allopatricspeciation • Slow changes in landscape • Mountainridges • Formation of lakes • Drifting of continents

  3. Dynamiclandscapes • Fast (repetitive) changes in landscape: • Glaciation • Islands and changing sea levels • Fluctuating lake levels • On a different spatio-temporal scale: • Predators • Dispersal andexpansion • Alternatingperiods of allopatryandsympatry Aguilée et al. 2010

  4. Aguilée et al. 2010 Aguilée et al 2010

  5. Focal system

  6. Lake Tanganyika Water elvel below present Million years ago

  7. Eretmodini Ruberet al. 1999 PNAS

  8. Summary andaims • Changes in landscapes canberelativelyfast • Lake Tanganyika has experienceddramatic changes in water level • Have these changes in waterlevel driven the currentdiversity in cichlids?

  9. The model

  10. Lineages-through-time plots (LTT) Slide by R. S. Etienne

  11. Lamprologini Sturmbauer et al. 2010

  12. Typical run Simulation Empirical data Water level

  13. Stochasticity

  14. Rate of water level fluctuation Speciationrate Extinctionrate

  15. Found estimates Specrate: Coyne & Orr 2004 Waterlevel: Lezzar 1996, Cohen 1997, Scholz 2003

  16. Conclusion & Perspectives • Dynamic landscapes are important in shapingdiversity • Estimates of this model are well in line withempiricalestimates • Fit this model tosimilar systems

  17. Thanks to: • RampalEtienne • Lucas Molleman • Hanno Hildenbrandt • Stephan Koblmüller Picture courtesyT. Janzen

More Related