Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern
Help
 

GeoTreesearch


Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

(1.0 MB)

Title: Potential impacts of year-round sampling on monitoring presence- absence of invasive flora in the southern United States

Author: Oswalt, Christopher M.; Oswalt, Sonja N.; Moser, W. Keith

Date: 2012

Source: In: McWilliams, Will; Roesch, Francis A. eds. 2012. Monitoring Across Borders: 2010 Joint Meeting of the Forest Inventory and Analysis (FIA) Symposium and the Southern Mensurationists. e-Gen. Tech. Rep. SRS-157. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 113-121.

Publication Series: Paper (invited, offered, keynote)

   Note: This article is part of a larger document. View the larger document

Description: Studies suggest that the southern United States is an area of primary concern with regards to the spread of nonnative invasive plant species. Recent data show that species such as Japanese honeysuckle (Lonicera japonica) and Nepalese browntop (Microstegium vimineum) are invading forests and displacing native species throughout the southern United States. Monitoring on large spatial scales is among the most important mechanisms for the detection and prevention of the spread of nonnative species. Accurate assessments of on-going biological invasions are a primary research priority in the Southeast. As one method for addressing this need, the US Forest Service Southern Research Station (SRS), in partnership with State forestry agencies across the South, initiated a southern region survey of 33 invasive plant taxa in 2001 on all forest ownerships as part of the SRS Forest Inventory and Analysis (FIA) program. Currently in the southern United States, presence-absence data is collected for select invasive flora throughout the calendar year. Little is known about the impacts of year-round sampling on the quality of invasive flora data collection. In this study we investigate the implications of year-round sampling on presence-absence data collected by the southern FIA program for states east of the Mississippi river. Chinese and European privets (Ligustrum spp) are observed on FIA plots most often between February and May, and least often between September and December. Exotic roses (Rosa spp) and Japanese honeysuckle follow a similar trend. Nepalese browntop, however, is observed more often between August and October. Moreover, Nepalese browntop is observed more than four times as often during peak months than it is during the period between December and April. These results suggest that plant apparency may be impacting the quality of presence-absence data collected by the SRS-FIA program. While the systematic nature of the FIA sampling design minimizes the impact to population estimates of sampled invasive flora, year-round sampling may be impacting attempts to accurately portray the geographical distribution of a given plant.

Keywords: forest Inventory, invasive species, exotic plants, sampling bias, plant survey

Publication Notes:

  • 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.
  • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Oswalt, Christopher M.; Oswalt, Sonja N.; Moser, W. Keith 2012. Potential impacts of year-round sampling on monitoring presence- absence of invasive flora in the southern United States. In: McWilliams, Will; Roesch, Francis A. eds. 2012. Monitoring Across Borders: 2010 Joint Meeting of the Forest Inventory and Analysis (FIA) Symposium and the Southern Mensurationists. e-Gen. Tech. Rep. SRS-157. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 113-121.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.