Skip to Main Content
Interpreting landscape change in high mountains of northeastern Oregon from long-term repeat photography.Author(s): Jon M. Skovlin; Gerald S. Strickler; Jesse L. Peterson; Arthur W. Sampson
Source: Gen. Tech. Rep. PNW-GTR-505. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 78 p
Publication Series: General Technical Report (GTR)
Station: Pacific Northwest Research Station
View PDF (129.0 MB)
DescriptionWe compared 45 photographs taken before 1925 to photographs taken as late as 1999 and documented landscape changes above 5,000 feet elevation in the Wallowa, Elkhorn, and Greenhorn Mountains of northeastern Oregon. We noted the following major changes from these comparisons: (1) the expansion of subalpine fir into mountain grasslands, (2) the invasion of moist and wet meadows by several tree species, (3) a loss of whitebark pine from subalpine habitats, (4) continued soil erosion stemming from livestock grazing long since discontinued, and (5) a high rate of natural gravitational mass wasting. The most important factor contributing to changes in woody vegetation has been a reduction in fire frequency. Fires that occurred before 1925 were nine times more frequent than those that occurred at the end of the 20th century. Historical land uses and origins of place names are described.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- 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.
CitationSkovlin, Jon M.; Strickler, Gerald S.; Peterson, Jesse L.; Sampson, Arthur W. 2001. Interpreting landscape change in high mountains of northeastern Oregon from long-term repeat photography. Gen. Tech. Rep. PNW-GTR-505. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 78 p
KeywordsWallowas, Elkhorns, Greenhorns, Oregon, photography (repeat), photo history, land use, long-term change, landscape ecology, tree encroachment, whitebark pine, recreation, Eagle Cap Wilderness Area, erosion, fire frequency, climate, subalpine ecosystem
- Protecting whitebark pines through a mountain pine beetle epidemic with verbenone-is it working?
- Tenderfoot Creek Experimental Forest
- Proceedings of the ninth Lake States Forest Tree Improvement Conference, August 22-23, 1969.
XML: View XML