01675nas a2200193 4500008004100000022001400041245006400055210006400119260001600183300001200199490000800211520110500219100002001324700001801344700002301362700002101385700002001406856005501426 2011 eng d a0027-551400aPhytophthora species in forest streams in Oregon and Alaska0 aPhytophthora species in forest streams in Oregon and Alaska cAug-01-2012 a22 - 350 v1033 a

Eighteen Phytophthora species and one species of Halophytophthora were identified in 113 forest streams in Alaska, western Oregon and southwestern Oregon that were sampled by baiting or filtration of stream water with isolation on selective media. Species were identified by morphology and DNA characterization with single strand conformational polymorphism, COX spacer sequence and ITS sequence. ITS Clade 6 species were most abundant overall, but only four species, P. gonapodyides (37% of all isolates), P. taxon Salixsoil, P. taxon Oaksoil and P. pseudosyringae, were found in all three regions. The species assemblages were similar in the two Oregon regions, but P. taxon Pgchlamydo was absent in Alaska and one new species present in Alaska was absent in Oregon streams. The number of Phytophthora propagules in Oregon streams varied by season and in SW Oregon, where sampling continued year round, P. taxon Salixsoil, P. nemorosa and P. siskiyouensis were recovered only in some seasons.

1 aReeser, Paul, W1 aSutton, Wendy1 aHansen, Everett, M1 aRemigi, Philippe1 aAdams, Gerry, C uhttps://www.tandfonline.com/doi/pdf/10.3852/10-013