RESPONSE OF AMPHIBIANS TO CLEARCUTTING, BURNING, AND GLYPHOSATE APPLICATION IN THE OREGON COAST RANGE

We sampled amphibians on 3 red alder (Alnus rubra) sites 1 year before and 1 and 2 years after die following treatments were applied to each site: (1) control (uncut), (2) clearcut and broadcast burned, and (3) clearcut, broadcast burned, and then sprayed with the herbicide glyph osate. All sites included uncut riparian buffer strips. For 3 of the 6 species with greater than or equal to 20 captures in pitfall traps, w e did not detect changes in capture rates after clearcutting. Capture rates of ensatinas (Ensatina eschscholtzii) and Pacific giant salamand ers (Di- camptodon tenebrosus) decreased after logging. Capture rates of western redback salamanders (Plethodon vehiculum) increased the fir st year after logging, probably because the salamanders sheltered in p itfalls, but effects on populations were unclear Logging did not signi ficantly alter capture rates of rough-skin newts (Taricha granulosa), Dunns's salamanders (P. dunni), and red-legged frogs (Rana aurora). Pl anning the location and timing of clearcuts or other silvicultural pra ctices over a landscape and retaining riparian buffer strips may be ne cessary to ensure long-term persistence of Pacific giant salamanders. We did not detect any effects of herbicide spraying on capture rates. Capture rates for rough-skin newts and red-legged frogs mere higher in uncut red alder stands than in Douglas-fir (Pseudotsuga menziesii) st ands sampled in other studies, an indication that, when red alder stan ds are converted to Douglas-fir, some alders should be left adjacent t o streams to provide habitat for these species and other hardwood asso ciates.