Skip to Main Content
The national picture of nonnative plants in the United States according to FIA dataAuthor(s): Sonja N. Oswalt; Christopher M. Oswalt
Source: In: Morin, Randall S.; Liknes, Greg C., comps. Moving from status to trends: Forest Inventory and Analysis (FIA) symposium 2012; 2012 December 4-6; Baltimore, MD. Gen. Tech. Rep. NRS-P-105. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. [CD-ROM]: 262-267.
Publication Series: Paper (invited, offered, keynote)
Station: Northern Research Station
PDF: View PDF (2.1 MB)
DescriptionData collected by the U.S. Forest Service Forest Inventory and Analysis Program was assembled from each region of the United States. Occurrence, measured as the percentage of forested subplots within a county with observed nonnative invasive plant (NNIP) species, was calculated across the continental United States and Hawaii. Each region, and in some cases each state, maintains a specific watch list to constrain monitoring to only the most important NNIP species within a given area. Therefore, occurrence is based on regionally important species and is inconsistent across the United States. NNIP can be found invading forests across all of the United States. Eastern U.S. forests, however, currently exhibit high levels of NNIP occurrence. Major U.S. travel corridors and areas of considerable forest fragmentation that are often coupled with the large human population in the eastern United States can be important drivers of NNIP distributions. Travel corridors are known to play a profound role in the spread and growth of invasive plants. That fact is evident in maps of NNIP species where many major U.S. interstates are apparent. For example, the I-85 corridor from Virginia to Alabama is an area of intense invasive plant abundance. When forests are divided into smaller and smaller parcels (fragmented), the biological diversity of native animals and plants is diminished, water cycles are altered, and often nonnative invasive plants are introduced. This could help explain the high degree of plant invasions in the heavily agriculture dominated landscapes of the middle southern and middle western United States.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationOswalt, Sonja N.; Oswalt, Christopher M. 2012. The national picture of nonnative plants in the United States according to FIA data. In: Morin, Randall S.; Liknes, Greg C., comps. Moving from status to trends: Forest Inventory and Analysis (FIA) symposium 2012; 2012 December 4-6; Baltimore, MD. Gen. Tech. Rep. NRS-P-105. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. [CD-ROM]: 262-267.
Keywordsstatistics, estimation, sampling, modeling, remote sensing, forest health, data integrity, environmental monitoring, cover estimation, international forest monitoring
- Updating the southern nonnative plant watch list: the future of NNIP Monitoring in the south
- Relationship of invasive groundcover plant presence to evidence of disturbance in the forests of the upper midwest of the United States. Chapter 3.
- Determining effective riparian buffer width for nonnative plant exclusion and habitat enhancement
XML: View XML