Invasive plants jobs 1.Catalina Island Conservancy internships: June 25- August 17. Information at: 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

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):

4)Impacts

Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77:

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

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

4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77: 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

4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77: 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

4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77: 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

4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77: 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

4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77: 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

4)Impacts Some observations: “Tens Rule” From Williamson & Fitter (1996) Ecology 77: 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

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

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

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?

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

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