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Abstract
Vegetation data from the 1997 inventory of non-Federal forests in western Oregon were examined to assess the abundance of invasive nonnative plants detected by the inventory. Inventoried plants were the more common, identifiable species; composites and graminoids were underrepresented. Nonnative species were found on 1,040,000 ha (35 percent) of the non-Federal forest land in western Oregon. Abundance of most nonnatives was greater on lands that had been recently clearcut or thinned and was more closely related to stand density than climate. Most species were shade-intolerant, but shade-tolerant ivy and holly have the potential to greatly increase in abundance.
Parent Publication
Citation
Gray, Andrew N. 2005. Nonnative Plants in the Inventory of Western Oregon Forests. In: McRoberts, Ronald E.; Reams, Gregory A.; Van Deusen, Paul C.; McWilliams, William H.; Cieszewski, Chris J., eds. Proceedings of the fourth annual forest inventory and analysis symposium; Gen. Tech. Rep. NC-252. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 11-16
