Summary of Coniferous
Forest Bird Conservation Plan - derived from species account author and
by: Paul Brandy
– Decreasing significantly nationally 2.5 - 3%, more significant in West
(highly significant).Western decrease = 4.1%. Recent declines (last 10
years) in Sierra Nevada signficant from BBS.
B. Habitat Needs
association with old growth (structurally diverse canopy layers).
fire habitat, epsecially high intensity (but also low intensity).
association with clear cuts and thinning (abundance).
in 0-20 year age stands. Between 20 to multi-layer stage not present, then
openings, blow downs, land slides.
range requirements: Positive association with increased snag density and
association with residual timber. Move into area after clear cut.
of seral stages.
(almost significant) with managed timber areas compared to fire (probably
due to predation – corvids?).
productivity (lowest of any passerine in N. America?)
between productivity in managed timber lands vs. fire – managed timber
might be sink.
loss in general. Shift to younger seral stage (old growth being replaced
by clear cuts).
of habitat on wintering ground, especially for California populations.
of natural disturbance.
pesticide effects (spraying after clearcut to control weeds).
much post fire salvage-logging reduces habitat utility.
reproductive success in managed forest.
optimal habitat requirements for productivity (old growth vs. logged vs.
burned vs. natural disturbance). Determine why not productive in managed
impact of post-clearcut pesticide use, pesticides in general
post-fire salvage logging.
or acquired old growth should include old growth types suitable for OSFL
(natural openings, semi-open, multi-storied canopy, S. facing slopes, exposed
rocks) – not just closed canopy (which might be fine for BRCR and PIWO).
factors limiting or affecting prey sources.