Transcript Impacts of invasive species: introduction

Invasive plants jobs
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Catalina Island Conservancy internships: June 25August 17. Information at:
www.catalinaconservancy.org
Rocky Mountain Biological Laboratory (Gothic,
CO) Invasive Plants intern:
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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 1st, accepted until April 1st.
Contact: Dr. Jennifer Reithel ([email protected])
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.
4) Impacts
4) Impacts
Some observations:
• “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666
4) Impacts
Some observations:
• “Tens Rule” From Williamson & Fitter (1996) Ecology 77:1661-1666
Only ~10% of imported species escape to wild
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
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
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
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
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
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
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
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