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Keyword: Arizona

Multiple resource evaluations on the Beaver Creek watershed: An Annotated Bibliography (1956-1996)

Publications Posted on: December 31, 2012
The Beaver Creek experimental watershed, located in north-central Arizona, was established in 1956 in response to public concerns that the flow of streams and the amount of livestock forage on watersheds in the Salt-Verde River Basins were being reduced by increasing densities of ponderosa pine saplings and pinyon-juniper trees.

Developing a prediction model for Armillaria solidipes in Arizona

Publications Posted on: November 09, 2012
In 2010, a collaborative project was started to determine the distribution of Armillaria solidipes (= A. ostoyae) in Arizona. The methods and preliminary accomplishments of the 2010 and 2011 (ongoing) field surveys/collections are summarized. During the next phase of this project, surveys will be completed and remaining Armillaria isolates will be identified using DNA-based methods.

Vulnerability of species to climate change in the Southwest: threatened, endangered, and at-risk species at the Barry M. Goldwater Range, Arizona

Publications Posted on: July 30, 2012
Future climate change is anticipated to result in ecosystem changes, and consequently, many species are expected to become increasingly vulnerable to extinction. This scenario is of particular concern for threatened, endangered, and at-risk species (TER-S) or other rare species. The response of species to climate change is uncertain and will be the outcome of complex interactions and processes.

Depositional characteristics and sediment availability resulting from the post-Schultz Fire floods of 2010

Publications Posted on: May 09, 2012
Wildfire is a major land management concern due to direct impacts of fire on forest resources, and potentially negative effects on landscape processes by increasing rates of runoff, erosion, downstream sedimentation, and overall site degradation (DeBano et al. 1998, Neary et al. 2005, Robichaud et al. 2010).

Magnitudes and timing of seasonal peak snowpack water equivalents in Arizona: A preliminary study of the possible effects of recent climatic change

Publications Posted on: April 04, 2012
Field measurements and computer-based predictions suggest that the magnitudes of seasonal peak snowpack water equivalents are becoming less and the timing of these peaks is occurring earlier in the snowmelt-runoff season of the western United States. These changes in peak snowpack conditions have often been attributed to a warming of the regional climate.

Western yellow pine in Arizona and New Mexico

Publications Posted on: April 05, 2011
Western yellow pine is to the Southwest what white pine is to the Northeast, or longleaf pine to the Southeast. The commercial forests of Arizona and New Mexico are three-fourths western yellow pine, which furnishes by far the greater part of the lumber used locally as well as that shipped to outside markets.

Invasion resistance and persistence: established plants win, even with disturbance and high propagule pressure

Publications Posted on: November 08, 2010
Disturbances and propagule pressure are key mechanisms in plant community resistance to invasion, as well as persistence of invasions. Few studies, however, have experimentally tested the interaction of these two mechanisms.

Effects of prescribed fire on winter assemblages of birds in ponderosa pine forests of northern Arizona

Publications Posted on: September 17, 2010
Studies of birds in winter are rare in wildlife ecology despite winter being a critical time for birds. We examined winter assemblages of birds in ponderosa pine (Pinus ponderosa) forests of northern Arizona following prescribed fire. We conducted point counts on two study sites in northern Arizona from mid-October to mid-March 2004-2006.

Site-index curves for young-growth ponderosa pine in northern Arizona

Publications Posted on: August 25, 2010
The productive capacity or site quality of an area enters into nearly every phase of forest management from regeneration to final harvest. No standards or measures of site quality have been developed specifically for ponderosa pine in the Southwest, which handicaps the forest manager.

Observations of bird numbers and species following a historic wildfire in Arizona ponderosa pine forests

Publications Posted on: March 04, 2010
The Rodeo-Chediski Wildfire, the largest in Arizona's history, damaged or destroyed ecosystem resources or disrupted ecosystem functioning in a mostly mosaic pattern throughout the ponderosa pine (Pinus ponderosa) forests exposed to the burn.