Issues
at Hendricks Park
Non-native, Invasive Plant Species
The forest under-story has been
significantly impacted by invasive and ornamental species from nearby
residential landscaping, and to some degree by seeds carried in on
clothing and dog fur by park visitors.
Other invasive species, like sweet cherry, have been introduced by birds in their droppings, or
by squirrels as food caches, and a few have blown in by wind.
Road-cuts and trails through the park provide conditions favoring
the spread of introduced species. Of
the 198 native and naturalized vascular plant species inventoried in
Hendricks Park, about 60% are native, and 40% have been introduced (i.e.,
escaped, naturalized, non-native species).
In this latter category, 20 species are considered ãinvasive.ä

Invasives English Ivy (Hedera Helix) & Herb Robert (Geranium
Robertianum)
Forest
Inventory
In recent years a number of seemingly healthy Douglas-fir trees fell
during wind storms. These incidents and other issues raised concerns about
the health of the
Hendricks
Park
forest. In response, the city
appointed an advisory committee and hired a consultant to develop the Hendricks
Park Forest Management Plan. In 1999 the management plan established
24 permanent forest monitoring plots to provide baseline data about forest
conditions. In order to track changes in forest conditions the 24
permanent plots need to be re-inventoried every few years.
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Download
Final Report
Issues at Hendricks Park
Project Objectives
Project Task List
Project Development
Educational Plant
Guide
Invasive Species Monitoring
Treatment Study
Encroachment Study
Forest Inventory
Update
Plot Photo
Database
Data Analysis
Misc. Project
Photos
Reference Sites
Presentations
Fall Term
Presentation 
Winter Term Presentation

Final Presentation
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