Invasive Species - Norway Maple

posted May 7, 2015, 10:10 AM by Park Ranger
While walking the trails, you may notice a band around some tree trunks. Student Interns have learned about the Norway Maple Acer platanoides L. which is an invasive species in the United States.  

Interns are starting to eradicate the trees from the woods in McKaig by "girdling", a process which 2 paralell, ½" deep cuts are made all the way around the trunk of the tree, then the bark in between gets removed stopping nutrients getting to the top of the trees.

John Bartram of Philadelphia first introduced Norway maple from England to the U.S. in 1756 and soon began offering it for sale.


Norway maple forms monotypic populations by displacing native trees, shrubs, and herbaceous understory plants. Once established, it creates a canopy of dense shade that prevents regeneration of native seedlings. 

For more information visit: http://www.nps.gov/plants/alien/pubs/midatlantic/acpl.htm
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