Skip to Main Content
Spatial relationship between Phytophthora ramorum and roads or streams in Oregon tanoak forestsAuthor(s): Ebba Peterson; Everett Hansen; Alan Kanaskie
Source: Forest Ecology and Management 312: 216-224
Publication Series: Scientific Journal (JRNL)
Download Publication (1.29 MB)
DescriptionThe pathogen, Phytophthora ramorum, causal agent of sudden oak death (SOD) of oaks and tanoaks, continues to expand its range within Oregon despite an effort to eradicate it from native forests. With its early detection and prompt removal of infected hosts, the Oregon SOD eradication program has produced a landscape distribution of disease resulting predominantly from the long distance (100 m to 4 km) dispersal of inoculum between sites. Using a regionally restricted randomization test reflecting the south to north intensification of the SOD epidemic in Oregon, we assessed if the movement of P. ramorum between sites was spatially dependant upon roads and streams, topographic features associated with the landscape-scale movement of soil and water borne inoculum of related Phytophthora spp. Dissimilar to other forest Phytophthora spp. we found no association between SOD sites and the road network. We did, however, determine that SOD sites are occurring closer to streams than would be expected by chance, especially in regions with microclimates less conducive to establishment. Environmental conditions and/or dispersal mechanisms associated with streams may contribute to the distribution of SOD in Oregon tanoak forests. Monitoring and management should therefore concentrate on susceptible forests in close proximity to streams, especially in stands further inland from a coastal climate.
- You may send email to email@example.com 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.
CitationPeterson, Ebba; Hansen, Everett; Kanaskie, Alan.2014. Spatial relationship between Phytophthora ramorum and roads or streams in Oregon tanoak forests. Forest Ecology and Management 312: 216-224.
KeywordsForest pathology, Invasive pathogen, Phytophthora ramorum Restricted randomization, Spatial spread, Sudden oak death
- Source or Sink? The Role of Soil and Water Borne Inoculum in the Dispersal of Phytophthora ramorum in Oregon Tanoak Forests
- Comparison of the recovery of Phytophthora ramorum from tanoak and California bay laurel, and the potential recovery of inoculum in fog
- Efficacy of local eradication treatments against the sudden oak death epidemic in Oregon tanoak forests
XML: View XML