Survey of winter bird communities and vegetation in the Oregon Coast Range

We re-surveyed forest bird communities during winter in seven
large plots originally surveyed by graduate student, Stanley Anderson,
from 1968 through 1970, near Corvallis, Oregon, USA. The forests in
plots in the Coast Range Mountain
foothills were and are currently dominated by Douglas-fir
(Pseudotsuga menziesii). Anderson's thesis included plot locations,
summaries of vegetation characteristics and point estimates of bird
densities for each plot. Because of the lack of similar data, we
re-surveyed his plots after aligning methods with his and added
modern components (distance and time interval sampling) to
facilitate comparisons of changes in abundances. We preserved
more extensive metadata than were preserved from Anderson's surveys,
including georeferenced point count survey locations to
facilitate more precisely repeatable future re-surveys. We also
measured vegetation characteristics to compare structural changes since
Anderson's measurements.