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Ecosystem

Displaying 5341 - 5360 of 6066 results

Presents detailed age structure for two western larch stands that historically experienced frequent fires. Compares age structures of eleven ponderosa pine and western larch stands representing a broad range of sites that had frequent fires.…
Author(s): Stephen F. Arno, Helen Y. Smith, Michael A. Krebs
Year Published:

Acute toxicity tests were conducted with Hyalella azteca Saussure (an amphipod) exposed in soft and hard waters to three fire retardants (Fire‐Trol GTS‐R, Fire‐Trol LCG‐R, and Phos‐Chek D75‐F) and two foam suppressants (Phos‐Chek WD‐881 and Silv‐Ex…
Author(s): S. F. McDonald, Steven J. Hamilton, Kevin J. Buhl, James F. Heisinger
Year Published:

This FEIS species review synthesizes information on the relationship of Poa secunda (Sandberg bluegrass) to fire--how fire affects the species and its habitat, and fire management considerations. Information is also provided on the species'…
Author(s): Janet L. Howard
Year Published:

Sediment influx to channel networks is stochastically driven by rainstorms and other perturbations, which are discrete in time and space and which occur on a landscape with its own spatial variability in topography, colluvium properties, and state…
Author(s): Lee E. Benda, Thomas Dunne
Year Published:

This FEIS species review synthesizes information on the relationship of Ambystoma macrodactylum (long-toed salamander) to fire--how fire affects the species and its habitat, and fire management considerations. Information is also provided on the…
Author(s): Janet L. Howard
Year Published:

Spatially-varied hydrologic surface conditions exist on steep hillslopes after timber harvest operation and site preparation burning treatments. Site preparation burning creates low- and high-severity burn surface conditions or disturbances. In this…
Author(s): Peter R. Robichaud, T. M. Monroe
Year Published:

This book focuses on the causes, consequences, and possible means of avoiding organizational accidents. While individual accidents are more frequent and often target the individual for blame, organizational accidents are deep rooted errors in the…
Author(s): James Reason
Year Published:

From the introduction... "The magnitude and intensity of recent fires heighten concerns regarding forest/ecosystem health, the potential loss of valuable wood fiber and private property, and the apparent threat to sensitive species. Such concerns…
Author(s): Bruce E. Rieman, Danny C. Lee, Gwynne L. Chandler, Deborah Myers
Year Published:

In this study vegetation development is compared and contrasted following natural and logging disturbances in a major boreal river valley in Alberta. Permanent sample plots and releves were established and sampled for vegetation and landscape…
Author(s): Kevin P. Timoney, George Peterson, Ross W. Wein
Year Published:

To understand and avoid future calamities, decision makers must have a more accurate way of understanding past calamities. Most of what we know about calamities comes from eye witness accounts that favor relief efforts and damage reports rather than…
Author(s): Barry A. Turner, Nick F. Pidgeon
Year Published:

We examined the influence of a moderately severe wildfire on the thermal patterns in three small streams in central Idaho, USA, for an 11-month period beginning ten months after the fire. Two streams in unburned catchments served as reference sites…
Author(s): Todd V. Royer, G. Wayne Minshall
Year Published:

Water production from mountain watersheds depends on total precipitation input, the type and distribution of precipitation, the amount intercepted in tree canopies, and losses to evaporation, transpiration and groundwater. A systematic process was…
Author(s): Ward W. McCaughey, Phillip E. Farnes, Katherine J. Hansen
Year Published:

Acute toxicity tests were conducted exposing Daphnia magna Straus (daphnid) in soft and hard reconstituted waters (hardness 42 and 162 mg/liter as CaCO3, respectively), and Selenastrum capricornutum Printz (algae) in ASTM algal assay medium (…
Author(s): S. F. McDonald, Steven J. Hamilton, Kevin J. Buhl, James F. Heisinger
Year Published:

The 26 papers in this document address the current knowledge of fire as a disturbance agent, fire history and fire regimes, applications of prescribed fire for ecological restoration, and the effects of fire on the various forested ecosystems of the…
Author(s): Colin C. Hardy, Stephen F. Arno
Year Published:

From the Background...'A rapid decline in whitebark pine has occurred during the last 60 years as a result of three interrelated factors: epidemics of mountain pine beetle (Dendroctonus ponderosae); the introduced disease white pine blister…
Author(s): Robert E. Keane, Stephen F. Arno
Year Published:

This FEIS species review synthesizes information on the relationship of Taxidea taxus (American badger) to fire--how fire affects the species and its habitat, and fire management considerations. Information is also provided on the species'…
Author(s): Janet Sullivan
Year Published:

Palmer and Dunford analyze the concept of reframing and discuss four key limits to this concept. Reframing literature asserts that people generally are trapped into a singular way of thinking about a situation, and thus, they are unable to think…
Author(s): Ian Palmer, Richard Dunford
Year Published:

Elimination of the historic pattern of frequent low-intensity fires in ponderosa pine and pine-mixed conifer forests has resulted in major ecological disruptions. Prior to 1900, open stands of large, long-lived, fire-resistant ponderosa pine were…
Author(s): Stephen F. Arno
Year Published:

One of the critical mistakes made by wildland firefighters during both the Mann Gulch and South Canyon fires was their unwillingness to drop heavy tools and packs as they attempted to outrun the flames. Weick points to 10 possible reasons for their…
Author(s): Karl E. Weick
Year Published:

We investigated the short-term influence of fire on xeric sage grouse (Centrocercus urophasianus Bonaparte) brood habitat in southeastern Idaho from 1990-92.
Author(s): Richard A. Fischer, Kerry P. Reese, John W. Connelly
Year Published: