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Product Description This digital document is a journal article from Forest Ecology and Management, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser. Description: Phytophthora ramorum has caused extensive mortality to tanoak and several oak species in coastal California. This pathogen has infected at least 72 plant species under natural conditions and 32 additional species in the laboratory. Many infected hosts have been distributed across the United States by the horticultural industry. We developed a simulation model using CLIMEX software to evaluate the suitability of the climate in the United States for establishment of P. ramorum. CLIMEX was driven by monthly climate normal data for 1971-2000 collected from >5300 weather stations in the contiguous United States. CLIMEX growth-requirement and stress-response parameters were derived from literature data. Values for the ecoclimatic index (EI), a measure of overall climatic suitability based on temperature and soil moisture, were between 0 and 53. Much of the Intermountain West and the Great Plains was climatically unsuitable for establishment of P. ramorum (EI=0). Many states bordering the Great Lakes were marginal (025) for establishment of P. ramorum were common in the Gulf States, and areas considered favorable (10