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Ecosystem

Displaying 5241 - 5260 of 6066 results

Many of the accidents that organizations face are a result of complex interactions between multiple events and with multiple actors. They cannot be explained as being only one group or individual’s “fault”. In this book, Perrow investigates the…
Author(s): Charles Perrow
Year Published:

Pinyon-juniper woodlands involve vegetation dominated by about seven species of Pinus and 17 species of Juniperus scattered over more than 75 million acres of the Southwestern United States and Mexico. The junipers are more widespread latitudinally…
Author(s): Neil E. West
Year Published:

The 1996 fire season illustrated the potential impacts of wildland fires on the Bureau of Land Management (BLM) administered lands through numerous western states. During the 1996 fire season, over six million acres burned in the United States…
Author(s): Thomas C. Roberts
Year Published:

Forest scientists ask that everyone, from the home gardener to the forest manager, help revive western white pine by planting it everywhere, even in nonforest environments such as our neighborhood streets, parks, and backyards. White pine, long ago…
Author(s): Leon F. Neuenschwander, James W. Byler, Alan E. Harvey, Geral I. McDonald, Denise S. Ortiz, Harold L. Osborne, Gerry C. Snyder, Arthur Zack
Year Published:

This FEIS species review synthesizes information on the relationship of Amelanchier utahensis (Utah serviceberry) to fire--how fire affects the species and its habitat, and fire management considerations. Information is also provided on the species…
Author(s): Elena Zlatnik
Year Published:

The Federal Wildland Fire Management Policy and Program Review, chartered and completed in 1995, represents the latest stage in the evolution of wildland fire management. The concept of appropriate management response is central to this policy.…
Author(s): G. Thomas Zimmerman
Year Published:

Living things change constantly, as do communities of living things. In a forest, where individual trees can live for centuries and new plants replace old plants, it is not easy to visualize the changes that occur over time. Luckily, we have some…
Author(s): Helen Y. Smith, Stephen F. Arno
Year Published:

The flea beetle, Aphthona nigriscutis Foudras, is a potentially useful agent for biological control of leafy spurge (Euphorbia esula L.) in grasslands devoted to wildlife conservation. However, effects of other grassland management practices on the…
Author(s): David P. Fellows, Wesley E. Newton
Year Published:

This FEIS species review synthesizes information on the relationship of Artemisia tridentata subsp. wyomingensis (Wyoming big sagebrush) to fire--how fire affects the species and its habitat, and fire management considerations. Information is also…
Author(s): Janet L. Howard
Year Published:

This FEIS species review synthesizes information on the relationship of Ericameria nauseosa (rubber rabbitbrush) to fire--how fire affects the species and its habitat, and fire management considerations. Information is also provided on the species…
Author(s): D. A. Tirmenstein
Year Published:

This FEIS species review synthesizes information on the relationship of Elymus glaucus (blue wildrye) to fire--how fire affects the species and its habitat, and fire management considerations. Information is also provided on the species'…
Author(s): Kathleen A. Johnson
Year Published:

Categories of papers in the "Ecological Session" were history and ecological change, distribution, classification, ecology, and physiology, succession and diversity, and disease. Substantial changes have taken place in pinyon-juniper…
Author(s): W. A. Laycock
Year Published:

Thresholds are important to understanding Great Basin ecology. Once a threshold has been crossed, the new community may have very different functional capabilities than the previous community. Management action needs to occur well before a threshold…
Author(s): Robin J. Tausch
Year Published:

In the West, thinning and partial cuttings are being considered for treating millions of forested acres that are overstocked and prone to wildfire. The objectives of these treatments include tree growth redistribution, tree species regulation,…
Author(s): Russell T. Graham, Alan E. Harvey, Theresa B. Jain, Jonalea R. Tonn
Year Published:

This FEIS species review synthesizes information on the relationship of Hesperostipa comata (needle-and-thread grass) to fire--how fire affects the species and its habitat, and fire management considerations. Information is also provided on the…
Author(s): Elena Zlatnik
Year Published:

Visitors to National Forests in Colorado, Idaho, and Wyoming were asked how their visitation rates would change with the presence of a high-intensity crown fire, prescribed fire, and a 20-year-old high-intensity fire at the area they were visiting.…
Author(s): John B. Loomis, Jeffrey Englin, Armando Gonzalez-Caban
Year Published:

Fuel treatment activities are analyzed at the landscape scale by using both simulation and optimization. Simulating vegetative patterns and processes at landscape scales (SIMPPLLE), a stochastic simulation modeling system, is initially applied to…
Author(s): J. Greg Jones, Jimmie D. Chew, Hans R. Zuuring
Year Published:

In many western Montana ponderosa pine (Pinus ponderosa) stands, fire suppression and past selective logging of large trees have resulted in conditions favoring succession to dense stands of shade-tolerant, but insect- and disease-prone Douglas-fir…
Author(s): Donald J. Bedunah, Michael G. Harrington, Dayna M. Ayers
Year Published:

This comprehensive chapter documents, from a management perspective, the knowledge base on risk assessments and risk management. The previous chapter in the book is a companion article that provides the scientific foundation for the concepts and…
Author(s): D.A. Cleaves, R. W. Haynes
Year Published:

In 1974, two clearcuts, two shelterwoods, and two sets of eight group selections (equally divided between two elevation zones) were harvested on the Coram Experimental Forest in northwestern Montana. Four levels of tree and residue utilization were…
Author(s): Raymond C. Shearer, Jack A. Schmidt
Year Published: