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National Park Service U.S. Department of the Interior National Capital Region Network. Exotic-Invasive Plants. John Paul Schmit George Wright Society Meeting March 2011. Exotic Invasive Plants. Questions Can we determine what makes some parks more vulnerable?

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Exotic invasive plants

National Park Service

U.S. Department of the Interior

National Capital Region Network

Exotic-Invasive Plants

John Paul Schmit

George Wright Society Meeting

March 2011

E X P E R I E N C E Y O U R A M E R I C A


Exotic invasive plants1
Exotic Invasive Plants

Questions

Can we determine what makes some parks more vulnerable?

Can we determine what areas in parks might be more vulnerable?

Are there any species that show up in a certain type of habitat?


Exotic invasive plants2
Exotic Invasive Plants

Data

5 networks (ERMN, MIDN, NCBN,NCRN, NETN) and 2 prototype parks (CACO, SHEN)

List of the 33 worst exotic invasives (commonly found and problematic), plus any woody trees and shrubs

Total of 65 species from 40 parks, 1623 plots, 3094 observations of exotic-invasive plants


Invasives are common in forest plots
Invasives are Common in Forest Plots

E X P E R I E N C E Y O U R A M E R I C A


Of exotic species found per park
# of Exotic Species found per Park

E X P E R I E N C E Y O U R A M E R I C A


Exotic invasive plants

The Worst Plot:

Fort Circle Parks –Washington D.C.

14 Exotic Species

E X P E R I E N C E Y O U R A M E R I C A



What factors are related to differences in exotic invasives between parks
What Factors are Related to Differences in Exotic Invasives between Parks?

  • Park Area

  • Forested Area

  • % of Park Forested

  • Distance to nearest:

    • Park Boundary

    • Road

    • River

  • Elevation

  • 2009 Visitation

  • Latitude

E X P E R I E N C E Y O U R A M E R I C A





Exotic invasive plants within parks
Exotic/Invasive Plants within Parks between Parks?

  • Can we predict which plots are more likely to have exotic plants?

  • Examined 5 parks with 100+ plots (DEWA, FRSP, NERI, PRWI, SHEN)

  • Logistic regression

  • Predictors:

  • Distance to nearest:

    • Park Boundary

    • Road

    • River

  • Elevation

E X P E R I E N C E Y O U R A M E R I C A


What predicts invaded plots
What Predicts Invaded Plots? between Parks?

E X P E R I E N C E Y O U R A M E R I C A


Predicting the occurrence of individual species
Predicting the Occurrence of Individual Species between Parks?

  • What characterizes the parks where a species is found?

  • Where is the species found within parks?

E X P E R I E N C E Y O U R A M E R I C A


What predicts presence in parks
What Predicts Presence in Parks? between Parks?

E X P E R I E N C E Y O U R A M E R I C A


What predicts lonicera japonica invaded plots
What Predicts between Parks?Lonicera japonica Invaded Plots?

E X P E R I E N C E Y O U R A M E R I C A