Publications
Filter Total Items: 1999
Modelling root reinforcement in shallow forest soils
A hypothesis used to explain the relationship between timber harvesting and landslides is that tree roots add mechanical support to soil, thus increasing soil strength. Upon harvest, the tree roots decay which reduces soil strength and increases the risk of management -induced landslides. The technical literature does not adequately support this hypothesis. Soil strength values attributed to root
Authors
Arne E. Skaugset
A research problem analysis in support of the Cooperative Forest Ecosystem Research (CFER) Program
No abstract available.
Authors
Jeff P. Smith, Robert E. Gresswell, John P. Hayes
Wildlife response to thinning young forests in the Pacific Northwest
No abstract available.
Authors
J. P. Hayes, S.S. Chan, W.H. Emmingham, J. C. Tappeiner, L.D. Kellogg, J. D. Bailey
Rotifer abundance and distribution in the northern Cascade Mountains, Washington, USA
No abstract available.
Authors
E. Deimling, W.J. Liss, G.L. Larson, R. Hoffman, G.A. Lomnicky
Shorebird-prey interactions in South Carolina coastal soft-sediments
We investigated the simultaneous influence of benthic prey (primarily insect larvae, oligochaetes, and polychaetes) on spring-migrating shorebirds (Charadriiformes) and shorebirds on prey in brackish managed wetlands of South Carolina. We proposed that positive correlations between shorebird and prey densities and between prey reduction and shorebird density might result in a negative feedback loo
Authors
Louise M. Weber, Susan M. Haig
Effects of road management on movement and survival of Roosevelt elk
Road closures frequently are used to manage for Rocky Mountain elk (Cervus elaphus nelsoni), but no studies have evaluated the effects of limited vehicle access on movements and survival of Roosevelt elk (C. elaphus roosevelti). We studied movements and survival of female Roosevelt elk before Road Management Areas (RMA) were designated, and during limited vehicular access from 1991 to 1995. The Bu
Authors
Eric Cole, Michael D. Pope, Robert G. Anthony
Effects of drought and prolonged winter on Townsend's ground squirrel demography in shrubsteppe habitats
During a mark–recapture study of Townsend's ground squirrels (Spermophilus townsendii) on 20 sites in the Snake River Birds of Prey National Conservation Area, Idaho, in 1991 through 1994, 4407 animals were marked in 17639 capture events. This study of differences in population dynamics of Townsend's ground squirrels among habitats spanned a drought near the extreme of the 130-yr record, followed
Authors
Beatrice Van Horne, Gail S. Olson, Robert L. Schooley, Janelle G. Corn, Kenneth P. Burnham
Disturbance of biological soil crusts: Impacts on potential wind erodibility of sandy desert soils in southeastern Utah
Friction threshold velocities (FTVs) were determined for biological soil crusts in different stages of recovery. Particles on the surface of crusts that had been relatively undisturbed for at least 20 years were found to have significantly higher FTVs than those that had been disturbed 5, 10 or 1 years previously (376, 87, and 46 cm sec-1 , respectively). FTV's for crust breakage was also much hig
Authors
J. Belnap, Dale A. Gillette
Nitrogen metabolism of sheep and goats consuming Acacia brevispica and Sesbania sesban
We described the effects of two East African browses, Acacia brevispica and Sesbania sesban, on nitrogen metabolism of sheep and goats. The A. brevispica had a substantial amount of proanthocyanidins (condensed tannins); S. sesban did not. The browses were fed at three levels in combination with vetch (Vicia dasycarpa) and teff straw (Eragrostis abyssinica). Fecal N, N balance, and plasma urea N (
Authors
A. Woodward, J.D. Reed