The introduction of non-native pathogens can have profound effects on forest ecosystems resulting in tree mortality, changes in species composition, and altered fuel structure. The 1990’s introduction of Phytophthora ramorum, the pathogen recognized a . . .

Phytophthora ramorum, an aggressive introduced plant pathogen, has caused the death of several million tanoak (Lithocarpus densiflorus) and oak (Quercus spp.) trees throughout coastal forests of California and Oregon. In the United States, P. ramorum . . .

The primary foliar host for Phytophthora ramorum is Umbellularia californica (bay laurel), a tree species that serves as a reservoir for infections in California woodlands. I investigated environmental and pathogen-mediated influences on the incidence . . .