Petrified Forest National Park Invasive Plant Species Survey and Mapping; 2002-2005

Open-File Report 2009-1179
By: , and 



We conducted a survey for invasive nonnative plant species at Petrified Forest National Park from 2002 through 2005. The survey employed a unique sampling design consisting of a grid of consecutive one-hectare cells as the sampling units. Our use of predetermined sampling units allowed all observations to be referenced to a fixed area with geographic coordinates that easily transferred to a geographic information system. Our field team surveyed 2,730 sampling units in three select areas for at least 1 year and 879 sampling units for 4 years. During this period we identified 40 different invasive plant species; more than half the invasive plants (22 species) were annual forbs and grasses. Four invasive plant species occurred in 25 percent or more of all sampling units observed in one or more years: Bromus tectorum, Erodium cicutarium, Salsola tragus, and Sisymbrium altissimum. Salsola tragus was the most abundant species in all years and occurred in more than 55 percent of all sampling units surveyed each year.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Petrified Forest National Park Invasive Plant Species Survey and Mapping; 2002-2005
Series title Open-File Report
Series number 2009-1179
DOI 10.3133/ofr20091179
Edition -
Year Published 2009
Language ENGLISH
Publisher U.S. Geological Survey
Contributing office(s) Southwest Biological Science Center
Description Report: v, 73 p.; Data Package
Time Range Start 2002-01-01
Time Range End 2005-12-31
Online Only (Y/N) Y
Additional Online Files (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details