Skip to Main Content
Exotic plant species diversity: Influence of roads and prescribed fire in Arizona ponderosa pine forestsAuthor(s): James F. Fowler; Carolyn Hull Sieg; Brett G. Dickson; Victoria Saab
Source: Range Ecology and Management. 61: 284-293.
Publication Series: Scientific Journal (JRNL)
Station: Rocky Mountain Research Station
PDF: Download Publication (635.58 KB)
DescriptionMany studies have investigated the ecological effects of roads and roadsides as both habitat and dispersal corridors for exotic plant species. Several of these compared roadside exotic species richness and abundance with adjacent interior habitats, but we found no studies of individual exotic species' abundance between the two habitats in the context of prescribed fire. We measured exotic species richness and individual species' abundance along roadsides and in adjacent interior habitat (.150 m) before and after prescribed fire at three ponderosa pine (Pinus ponderosa Douglas ex Lawson & C. Lawson) sites in northern Arizona. Eighteen of the 20 exotic plant species found in this study have been and continue to be intentionally introduced or are known agricultural seed contaminants. Roadsides had significantly higher exotic species richness than adjacent forest interior habitats, but only one site showed a significant (decreasing) fire effect on species richness. Four exotic plant species had significantly higher densities along roadsides at two of the three sites, and four species had no significant difference in abundance between habitats at any site supporting an individualistic species response hypothesis. Most exotic species showed no significant change in density post-prescribed fire suggesting that low-intensity prescribed fire may have minimal effect on exotic species diversity. Variability in total exotic species richness, composition, species' constancies, and species' densities between the three regionally similar sites suggests differing degrees and effectiveness of past management practices and policies such as intentional seeding.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- 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.
CitationFowler, James F.; Sieg, Carolyn Hull; Dickson, Brett G.; Saab, Victoria. 2008. Exotic plant species diversity: Influence of roads and prescribed fire in Arizona ponderosa pine forests. Range Ecology and Management. 61: 284-293.
Keywordsexotic species abundance, exotic species richness, intentional introduction, ponderosa pine, prescribed fire, seeding
- Role of fire in restoration of a ponderosa pine forest, Washington
- Effects of prescribed fire on winter assemblages of birds in ponderosa pine forests of northern Arizona
- Effects of low intensity prescribed fires on ponderosa pine forests in wilderness areas of Zion National Park, Utah
XML: View XML