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Keyword: Arizona

Pre-wildfire fuel treatments affect long-term ponderosa pine forest dynamics

Publications Posted on: May 05, 2009
The 2002 Rodeo-Chediski fire, the largest wildfire in south-western USA history, burned over treated stands and adjacent untreated stands in the Apache-Sitgreaves National Forest, setting the stage for a natural experiment testing the effectiveness of fuel reduction treatments under conditions of extraordinary fire severity.

Fuel-reduction treatment effects on avian community structure and diversity

Publications Posted on: April 03, 2009
We assessed responses of the breeding bird community to mechanical thinning and prescribed surface fire, alone and in combination, between 2000 and 2006 in ponderosa pine (Pinus ponderosa) forests in northern Arizona, USA. Fuel-reduction treatments did not affect species richness or evenness, and effects on density of 5 commonly detected species varied among species.

Prescribed fire effects on bark beetle activity and tree mortality in southwestern ponderosa pine forests

Publications Posted on: January 14, 2009
Prescribed fire is an important tool in the management of ponderosa pine (Pinus ponderosa Dougl. ex Laws.) forests, yet effects on bark beetle (Coleoptera: Curculionidae, Scolytinae) activity and tree mortality are poorly understood in the southwestern U.S.

International co-operative program on assessment and monitoring of air pollution effects on forests: The Sierra Ancha Experimental Forest, Arizona

Publications Posted on: September 26, 2008
At the end of the 2007 Fiscal Year, the Experimental Forests and Ranges (EFR) Synthesis Network Committee awarded funds to 18 sites to establish a strategic ICP Level II (described below) synthesis network in the United States. Eleven Experimental Forest were selected to be included in the network, as well as seven Long Term Ecological Research (LTER) sites.

A survey of effects of intentional burning on fuels and timber stands of ponderosa pine in Arizona

Publications Posted on: September 15, 2008
Limited intentional burning of ponderosa pine timberlands to achieve net benefits has been going on for years. Many statements of results have been published. Most statements have been based on small plot records or subjective observations. Hence, the statements have been questioned by some readers and have led to debate over the merits of intentionally burning ponderosa pine timberlands.

Estimating canopy cover in forest stands used by Mexican spotted owls: Do stand-exam routines provide estimates comparable to field-based techniques?

Publications Posted on: June 06, 2008
Canopy cover has been identified as an important correlate of Mexican spotted owl (Strix occidentalis lucida) habitat, yet management guidelines in a 1995 U.S. Fish and Wildlife Service recovery plan for the Mexican spotted owl did not address canopy cover. These guidelines emphasized parameters included in U.S. Forest Service stand exams, and canopy cover typically is not sampled in these inventories.

Geologic associations of Arizona willow in the White Mountains, Arizona

Publications Posted on: April 02, 2008
The Arizona willow (Salix arizonica Dorn) is a rare species growing in isolated populations at the margins of the Colorado Plateau. Although its habitat in the White Mountains of Arizona has been mischaracterized as basaltic, the area is actually a complex mixture of felsic, basaltic and epiclastic formations.

Measurements of the effects of forest cover upon the conservation of snow waters

Publications Posted on: March 25, 2008
The large treeless openings or "parks" in the western yellow pine forests of the southwest, which form a well known characteristic, afford an excellent opportunity for a comparative study of the effect of a forest canopy upon local snow conditions.

Papers on climatology in relation to agriculture, transportation, water resources, etc.: The Coconino Forest Experiment Station near Flagstaff, Ariz.

Publications Posted on: March 25, 2008
The largest pine forest on the North American Continent extends from north-central Arizona in a southeasterly direction into southwestern New Mexico, a distance of approximately 250 miles The forest occupies an extensive plateau, known as the Colorado Plateau, which has a general elevation of from 6,000 to 8,000 feet above sea level, with numerous peaks the highest of which reaches an altitude of about 13,000 feet.

A meteorological study of parks and timbered areas in the western yellow-pine forests of Arizona and New Mexico

Publications Posted on: March 25, 2008
The object of the study, the results of which are presented here, was to determine the influence of the forest cover upon climate locally in the Southwest, in so far as this influence might be of importance in the management of timberlands and the possible afforestation of parks and denuded areas.