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149 results found
Significant changes over the past 150 years in aquatic, terrestrial, landscape, and socioeconomic systems have altered biophysical systems in the interior Columbia basin. Changes and conflict in public policy concerns, such as resource use vs. restoration vs. conservation are especially evident in…
Author(s): Richard W. Haynes, Thomas M. Quigley, Jodi L. Clifford, Rebecca A. Gravenmier
Keywords: forest management, ecosystems, land management planning
Source: Forest Ecology and Management. 153: 3-14
Year: 2001
The 1730-ha Serpentine Slide Research Natural Area (RNA) is located in central Alaska in the White Mountains National Recreation Area. It is managed by the U.S. Department of the Interior, Bureau of Land Management, Steese-White Mountains District. Serpentine Slide was selected as a Research…
Author(s): G.P. Juday
Keywords: Alaska, beaver, Castor canadensis, earthslide, ecosystems, goshawk, Accipiter gentilis, grizzly bear, Ursus arctos, hill prairie, Research Natural Area, Natural Areas (Research), northern wood frog, Rana sylvatica, old-growth forest, scientific reserves, serpentine, semipalmated plover, Charadrius semipalmatus, white spruce, Picea glauca
Source: Gen. Tech. Rep. PNW-GTR-271. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 66 p
Year: 1992
Southern Appalachian forests are undergoing considerable change due to altered disturbance regimes. For example, fire exclusion has had a major impact on the structure and function of pine-hardwood ecosystems. Recently, fire has been prescribed for a variety of applications: 1) stand-replacement in…
Author(s): Barton D. Clinton, James M. Vose, Jennifer D. Knoepp, Katherine J. Elliott
Keywords: disturbance, ecosystems, nitrate response, old growth, North Carolina, prescribed fire, resistance, riparian zone, southern Appalachia, stream
Source: Pages 174-181 in K.E.M. Galley, R.C. Klinger, and N.G Sugihara (eds.). Proceedings of Fire Conference 2000: The First National Congress on Fire Ecology, Prevention, and Management. Miscellaneous Publication No. 13, Tall Timbers Research Station, Tallahassee, FL
Year: 2003
Long-term qualitative observations suggest a marked decline in quaking aspen (Populus tremuloides Michx.) primarily due to advancing succession and fire suppression. This study presents an ecoregional coarse-grid analysis of the current aspen situation using Forest Health Monitoring (FHM) data from…
Author(s): Paul Rogers
Keywords: aspen, ecosystems, forest health, forest succession, forest disturbance, populus tremuloides
Source: Forest Ecology and Management. Vol. 155, no. 1-3, pp. 223-236.
Year: 2002
An appropriate yardstick for a biodiversity program is how it affects the persistence of viable populations. A coordinated program of biodiversity research could be structured under three overlapping subject areas: (1) threatened, endangered, and sensitive species; (2) restoration of missing,…
Author(s): James W. McMinn
Keywords: Genes, endangered species, plant communities, animal communities, ecosystems
Source: Gen. Tech. Rep. SE-71. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station. 7 p.
Year: 1991
A study of the water chemistry of Colorado Rocky Mountain Front Range alpine/subalpine lakes and streams in wilderness ecosystems was conducted during the summer of 1995 by the USDA Forest Service Arapaho and Roosevelt National Forests and Rocky Mountain Forest and Range Experiment Station, and the…
Author(s): Robert C. Musselman, Laura Hudnell, Mark W. Williams, Richard A. Sommerfeld
Keywords: water chemistry, alpine/subalpine lakes and streams, atmospheric deposition, nitrogen saturation, ecosystems, aquatic
Source: Res. Pap. RM-RP-325. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 13 p.
Year: 1996
Intermittent channels comprise a large proportion of the drainage network in many parts of the Pacific Northwest, and recent policy changes now afford them an unprecedented level of protection. If, during watershed analysis, these sites are found to be relatively unimportant in maintaining the…
Author(s): Leslie M. Reid, Robert R. Ziemer
Keywords: watershed analysis, channels, ecosystems, drainage, intermittent stream
Source: Issues in watershed analysis. Discussions at interdisciplinary and interagency workshops held at the Humboldt Interagency Watershed Analysis Center in McKinleyville, California. 13 p.
Year: 1994
Watershed analysis-the evaluation of processes that affect ecosystems and resources in a watershed-is now being carried out by Federal land-management and regulatory agencies on Federal lands of the Pacific Northwest. Methods used differ from those of other implementations of watershed analysis…
Author(s): Leslie M. Reid, Robert R. Ziemer, Michael J. Furniss
Keywords: watershed analysis, ecosystems, cumulative effects analysis
Source: Issues in watershed analysis. Discussions at interdisciplinary and interagency workshops held at the Humboldt Interagency Watershed Analysis Center in McKinleyville, California. 14 p.
Year: 1994
Human activities have degraded substantial portions of the nation’s ecological resources, including physical and biological aquatic systems. The effects are continuing and cumulative, and few high-quality aquatic ecosystems remain in the United States. Concern about these diminishing resources…
Author(s): Robert R. Ziemer
Keywords: PSW4351, ecosystems, riparian reserves, watershed analysis, salmonid
Source: In: Williams, Jack E., Christopher A. Wood, and Michael P. Dombeck (eds). Watershed Restoration: Principles and Practices. American Fisheries Society, Bethesda, Maryland. p. 80-95.
Year: 1997
Abstract - Important new lessons are not in technical details, but in how to scale up the details to apply to large watersheds and landscapes. Nearly three years of experience with the Northwest Forest Plan have revealed some major new challenges in the fields of watershed science. In particular…
Author(s): Robert R. Ziemer, Leslie M. Reid
Keywords: PSW4351, watershed analysis, watershed restoration, Redwood Creek basin, geomorphology, ecosystems, interdisciplinary approach
Source: In: Sari Sommarstrom (ed). What is watershed stability? Proceedings, Sixth Biennial Watershed Management Conference. 23-25 October 1996. Lake Tahoe, California/Nevada. University of California, Water Resources Center Report No. 92, Davis, California. p. 43-56.
Year: 1997