Pacific Northwest Research Station

Title: Estimating historical snag density in dry forests.

Author: Harrod, Richy J.; Gaines, William L.; Hartl, William E.; Camp, Ann.

Date: 1998

Source: Gen. Tech. Rep. PNW-GTR-428. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 16 p

Station ID: GTR-PNW-428

Description: Estimating snag densities in pre-European settlement landscapes (i.e., historical conditions) provides land managers with baseline information for comparing current snag densities. We propose a method for determining historical snag densities in the dry forests east of the Cascade Range. Basal area increase was calculated from tree ring measurements of old ponderosa pine (Pinus ponderosa Dougl. Ex Laws.) trees. Historical stand structure was assumed to be open and parklike, with low densities favoring larger diameter trees, and it was considered relatively stable at the landscape level.

Keywords: Snag density, ponderosa pine, Pinus ponderosa, snag recruitment, historical forest structure

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Citation

Harrod, Richy J.; Gaines, William L.; Hartl, William E.; Camp, Ann.  1998.  Estimating historical snag density in dry forests..   Gen. Tech. Rep. PNW-GTR-428. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 16 p