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In fire-prone spotted-owl forests, the most persistent closed canopy is not randomly distributed

Models from the Pacific Northwest place fire-persistent nesting and roosting forest in sheltered topography and lower slope positions, suggesting a way to spatially reconcile fuels restoration with habitat retention.

Evidence
Peer-reviewed
Geography
Eastern Washington Cascades, Klamath Province and southern Cascades, USA
System
Frequent-fire conifer forests and northern spotted-owl nesting/roosting habitat

WHAT THE EVIDENCE SAYS

A Forest Ecology and Management study modeled where northern spotted-owl nesting and roosting forest persists after fire in frequent-fire landscapes. Persistent forest was concentrated in topographically sheltered settings and lower slope positions, while exposed positions were less persistent. The spatial pattern resembles historical landscape heterogeneity and may help identify closed-canopy habitat that is both valuable to owls and relatively resistant to fire-driven loss.

WHY IT MATTERS / OUR READ

For land managers, the signal is to move beyond a blanket choice between ‘retain dense forest’ and ‘thin for resilience.’ Topography and fire-refugia potential can help decide where closed-canopy habitat is most defensible to retain and where restoration of more open structure may create less conflict. Spatial persistence becomes another decision layer alongside fuels, habitat quality and operational constraints.

CAVEATS / UNCERTAINTY

The models are observational and correlational, not a randomized treatment experiment. Relationships differed by region and fire history, and persistence fell under hotter fire-weather conditions. The authors recommend using the maps to guide and test management—not as a universal prescription for thinning or habitat retention.

SOURCE

Forest Ecology and Management
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