1. Cage Matching: Head to Head Competition Experiments of an Invasive Plant Species from Different Regions as a Means to Test for Differentiation Lortie et al. 2009

2. Why are invasive successful?

3. Invasion Hypotheses EICA – evolution of increased competitive ability Disturbance regimes

4. Ecotypic differentiation How the population of a species adapts to a particular set of environment conditions Shade-tolerant plantFull-sun plants

5. Objective Compare inter vs. intra regional competitive ability

6. Methods

8. Results

9.  For mixed plots

10. > ?

11. Novelty Compares invasibility of the same species in two different populations Focus on environmental drivers for plant invasion Couples biogeography with population ecology.

12. Future work? Compare YST in the native range

13. Questions What is ecotypic differentiation? How does ecotypic differentiation relate to competition? How was the Californian population more successful than the Argentinean population? What are some ways to experimental measure the response of competition in plants?