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Ecosystem

Displaying 5301 - 5320 of 6068 results

Laboratorys studies were conducted to determine the acute toxicity of three fire retardants (Fire‐Trol GTS‐R, Fire‐Trol LCG‐R, and Phos‐Chek D75‐F), and two fire‐suppressant foams (Phos‐Chek WD‐881 and Ansul Silv‐Ex) to early life stages of chinook…
Author(s): Kevin J. Buhl, Steven J. Hamilton
Year Published:

Plant mortality and productivity in semiarid grasslands may be affected by the length of time grazing is excluded during the postfire regeneration period. The degree of grazing tolerance for the semiarid bunchgrass species, Festuca idahoensis and…
Author(s): Stephen C. Bunting, Ronald Robberecht, Guillermo E. Defosse
Year Published:

Miller Creek, on the Flathead National Forest in northwest Montana, is a demonstration forest, showing up to 30 years of forest change after clearcutting and a wide range of fire treatments in 1967 and 1968. Differences in tree regeneration and…
Author(s): Penelope A. Latham, Raymond C. Shearer, Kevin L. O'Hara
Year Published:

Tenderfoot Creek Experimental Forest is used as a case study to model the effects of prescribed fire and silvicultural treatments on stand structure, snag recruitment, and coarse woody debris. The Forest Vegetation Simulator (FVS) and the Fire and…
Author(s): Colin C. Hardy, Elizabeth D. Reinhardt
Year Published:

This FEIS species review synthesizes information on the relationship of Bromus hordeaceus (soft chess) to fire--how fire affects the species and its habitat, invasiveness of the species, and fire management considerations. Information is also…
Author(s): Janet L. Howard
Year Published:

Stream nutrient data were collected both during a wildfire and over a subsequent five-year period. Sampling was from a series of paired watersheds located within and outside of the wildfire. Phosphorus and nitrogen concentrations increased from 5 to…
Author(s): F. Richard Hauer, Craig N. Spencer
Year Published:

We have developed a spatial database of historic natural fire regimes for the eleven western States to provide information in support of expected national increases in prescribed burning. Fire regimes are described in terms both of frequency and…
Author(s): Colin C. Hardy, James P. Menakis, Donald G. Long, James K. Brown, David L. Bunnell
Year Published:

This policy statement has been prepared in response to plans by some Federal, tribal and State wildland owners/managers to significantly increase the use of wildland and prescribed fires to achieve resource benefits in the wildlands. Many wildland…
Author(s): U.S. Environmental Protection Agency
Year Published:

This Phase III report of the interagency "Wildland Firefighter Safety Awareness" project presents over 200 recommendations for improving the organizational culture, leadership, human factors and external influences that affect wildland firefighter…
Author(s):
Year Published:

Guidelines in the form of a six-step approach are provided for estimating volumes, oven-dry mass, consumption, and particulate matter emissions for piled logging debris. Seven stylized pile shapes and their associated geometric volume formulae are…
Author(s): Colin C. Hardy
Year Published:

Environmental assessment of the Tenderfoot Research Project. This research project proposes to harvest timber in two treatment subwatersheds, Spring Park Creek and Sun Creek. The silvicultural system proposed is a two-aged system termed '…
Author(s): Gloria E. Flora, Ward W. McCaughey
Year Published:

Four conifer species [Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco), ponderosa pine (Pinis ponderosa Dougl. ex. Laws.), western larch (Larix occidentalis Nutt.), and western white pine (Pinus monticola Dougl. ex. D. Don)], growing…
Author(s): Brian P. Oswald, Kent Wellner, Robin Boyce, Leon F. Neuenschwander
Year Published:

Carroll begins by discussing how different staff members in an organization know different things about how work is accomplished. For an organization to run properly, these staff members must engage in organizational learning, which means…
Author(s): John S. Carroll
Year Published:

Wildfire is a major large-scale disturbance affecting terrestrial landscapes and lotic ecosystems in many regions of the world. We examined environmental and biological responses of 20 streams in Yellowstone National Park, U.S.A., over 5 years…
Author(s): G. Wayne Minshall, Christopher T. Robinson, Deron E. Lawrence
Year Published:

Mindful learning takes place with an awareness of contexts and of the ever-changing nature of information. A mindful approach is distinguished by three characteristics: the continuous creation of new categories, openness to new information, and an…
Author(s): Ellen J. Langer
Year Published:

Alder recognizes two decisions common to both the Mann Gulch and Storm King Mountain fires that influenced the behavior of firefighters during critical moments: 1) failing to question authority and 2) failing to obey authority. He argues that these…
Author(s): G. Stoney Alder
Year Published:

This paper analyzes data from 339 large wildland fires that occurred in the Continental United States from 1971 through 1984. Each fire burned 1,000 acres (400 ha) or more. Each fire was associated with the nearest upper-air weather station and…
Author(s): Brian E. Potter
Year Published:

This report evaluates 24 computer-aided decision support systems (DSS) that can support management decision-making in forest ecosystems. It compares the scope of each system, spatial capabilities, computational methods, development status, input and…
Author(s): H. Todd Mowrer
Year Published:

We used 16 years of survey data for a moose population, and 3 Landsat satellite scenes, 19 years, to evaluate the hypotheses that Ontario's Moose Habitat Guidelines for timber harvest: (1) the effects of unmodified clearcuts on moose populations,…
Author(s): Robert S. Rempel, Philip C. Elkie, Arthur R. Rodgers, Michael J. Gluck
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: