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Publication Title:   Effects of landslide erosion on subsequent Douglas-fir growth and stocking levels in the western Cascades, Oregon

Year:  1984     Status:  Published     Publication Type:  Journal Article

H. J. Andrews Publication Number:  656

Citation:  Miles, D. W. R.; Swanson, F. J.; Youngberg, C. T. 1984. Effects of landslide erosion on subsequent Douglas-fir growth and stocking levels in the western Cascades, Oregon. Soil Science Society of America Journal. 48(3): 667-671.

Online PDF:  http://andrewsforest.oregonstate.edu/pubs/pdf/pub656.pdf

Abstract: 

Shallow, rapid landslides are common events in steep terrain of the Pacific Northwest. The effect of landslides on timber growth potential of forest land was estimated by examining a 30-yr history of clearcutting and landsliding in the western Oregon Cascades. The height growth of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] and stocking level of all commercial conifer species on naturally regenerated landslides were compared with the height growth and stocking level on nearby, artificially regenerated clear-cut units of similar aspect, elevation, ages, and slope position. Average height growth of Douglas-fir trees 5 to 18 years old on the landslides was reduced 62% compared to trees on clear-uts, and the average stocking level was reduced 25% from the clear-cut level. One-third of the landslide area was estimated to be nonstockable because of unstable or impenetrable substrate.

Personnel and Keyword Links

Author Links
Miles ,  Donald   W. R.
Swanson ,  Frederick   J.
Youngberg ,  C.   T.


Theme
Community dynamics
Douglas-fir forest
Erosion
Forest dynamics
Forest ecosystems
Forest regeneration
Landslides/earthflows
Mass movement
Productivity
Regeneration
Seedlings
Soil disturbance
Soil dynamics

Place
Oregon
Oregon Cascades
Western Oregon Cascades
Western Oregon

Taxa
Pseudotsuga menziesii