1. Invasive plants jobs 1.Catalina Island Conservancy internships: June 25- August 17. Information at: www.catalinaconservancy.org www.catalinaconservancy.org 2.Rocky Mountain Biological Laboratory (Gothic, CO) Invasive Plants intern: 40 hrs/week June 12-Aug 11 (8 weeks) Room and meals supplied Management and experiments on smooth brome and Canada thistle Applications reviewed March 1 st, accepted until April 1 st. Contact: Dr. Jennifer Reithel (jreithel@gmail.com)

2. Invasive species impacts: reading Strayer, D., V. Eviner, J. Jeschke, and M. Pace (2006). Understanding the long-term effects of species invasions. Trends in Ecology and Evolution 21 (11):645-651.

3. 4)Impacts

4. Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666

5. 4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666 Only ~10% of imported species escape to wild

6. 4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666 Only ~10% of imported species escape to wild Of species that make it to the wild, only ~10% become naturalized

7. 4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666 Only ~10% of imported species escape to wild Only ~10% of species that make it to the wild become naturalized Of species that become naturalized, only ~10% become pests

8. 4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666 Only ~10% of imported species escape to wild Only ~10% of species that make it to the wild become naturalized Only ~10% of naturalized species become pests

9. 4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666 Only ~10% of imported species escape to wild Only ~10% of species that make it to the wild become naturalized Only ~10% of naturalized species become pests Example: 1000 imported species

10. 4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666 Only ~10% of imported species escape to wild Only ~10% of species that make it to the wild become naturalized Only ~10% of naturalized species become pests Example: 1000 imported species 100 escape to wild

11. 4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666 Only ~10% of imported species escape to wild Only ~10% of species that make it to the wild become naturalized Only ~10% of naturalized species become pests Example: 1000 imported species 100 escape to wild 10 become naturalized

12. 4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666 Only ~10% of imported species escape to wild Only ~10% of species that make it to the wild become naturalized Only ~10% of naturalized species become pests Example: 1000 imported species 100 escape to wild 10 become naturalize 1 becomes pest

13. 4)Impacts Some observations: “Tens Rule” Measuring impact is complex What should be measured and how?

14. 4)Impacts Some observations: “Tens Rule” Measuring impact is complex What should be measured and how? For individual plant, individual species, or multiple species?

15. 4)Impacts Some observations: “Tens Rule” Measuring impact is complex What should be measured and how? For individual plant, individual species, or multiple species? Over what time frame?

16. 4)Impacts Some observations: “Tens Rule” Measuring impact is complex Lack of comprehensive data

17. 4)Impacts a)Ecological Conceptual model: From Walker & Smith in Lukens & Thieret (1997) Invasive species affect different community & ecosystem processes