Skip to Main Content
Forest cover dynamics in the Pacific Northwest west side: regional trends and predictions.Author(s): Ralph J. Alig; Daolan Zheng; Thomas A. Spies; Brett J. Butler
Source: Res. Pap. PNW-RP-522. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 22 p
Publication Series: Research Paper (RP)
Station: Pacific Northwest Research Station
Download Publication (142 KB)
DescriptionThe objectives of this paper were to (1) analyze recent rates of transitions among forest cover types on private timberland, (2) identify differences by ownership class, and (3) project future changes under different scenarios related to current policy issues in the Pacific Northwest. Timber harvests are the dominant class of disturbance on private timberland in western Oregon and Washington. Net changes in forest type areas depend on the relative mix of natural and human-related forces. Transitions among forest types after harvest may be planned, as in conversion of red alder (Alnus rubra Bong.) to the commercially preferred Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), or stochastic successional changes, such as reversion of disturbed areas to red alder in the absence of intervention. Projected areas of Douglas-fir and red alder were notably different under a scenario without harvests versus a scenario in which the rate of partial harvesting is increased. Areas of Douglas-fir were projected to increase under selected scenarios for both industrial and nonindustrial private ownerships. Conversely, areas of red alder are projected to decrease under selected scenarios and for both ownerships.
- Visit PNW's Publication Request Page to request a hard copy of this publication.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationAlig, Ralph J.; Zheng, Daolan; Spies, Thomas A.; Butler, Brett J. 2000. Forest cover dynamics in the Pacific Northwest west side: regional trends and predictions. Res. Pap. PNW-RP-522. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 22 p
KeywordsForest type transitions, forest land management, temporal analyses, periodic surveys
- Brush control on forest lands with emphasis on promising methods for the Pacific Northwest: a review of selected references.
- Annualized diameter and height growth equations for Pacific Northwest plantation-grown Douglas-fir, western hemlock, and red alder.
- Growth of bear-damaged trees in a mixed plantation of Douglas-fir and red alder.
XML: View XML