You are here

Keyword: Arizona

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.

Geologic influences on Apache trout habitat in the White Mountains of Arizona

Publications Posted on: March 14, 2008
Geologic variation has important influences on habitat quality for species of concern, but it can be difficult to evaluate due to subtle variations, complex terminology, and inadequate maps. To better understand habitat of the Apache trout (Onchorhynchus apache or O.

Hydrology of southwestern encinal oak ecosystems: A review and more

Publications Posted on: March 13, 2008
Information about the hydrology of oak ecosystems of the southwestern United States and northern Mexico is lacking (Lopes and Ffolliott 1992, Baker et al. 1995) even though the woodlands and savannas cover more than 31,000 square miles. These ecosystems generally are found between 4,000 and 7,300 feet in elevation. Precipitation occurs in the winter and summer and averages between 15 and 20 inches annually.

Chapter 6: Research needs for the conservation of the cactus ferruginous pygmy-owl in Arizona

Publications Posted on: December 13, 2007
In this chapter, we describe research needs for the conservation of the cactus ferruginous pygmy-owl (Glaucidium brasilianum cactorum) in Arizona. Estimates of population size, structure, and dynamics, as well as demographic data, are needed for the recovery team to formulate sound population objectives.