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Keyword: Arizona

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.

Do riparian plant community characteristics differ between Tamarix (L.) invaded and non-invaded sites on the upper Verde River, Arizona?

Publications Posted on: December 01, 2009
Invasion by Tamarix (L.) can severely alter riparian areas of the western U.S., which are globally rare ecosystems. The upper Verde River, Arizona, is a relatively free-flowing river and has abundant native riparian vegetation. Tamarix is present on the upper Verde but is a minor component of the vegetation (8% of stems).

Spruce aphid, Elatobium abietinum (Walker): Life history and damage to Engelmann spruce in the Pinaleno Mountains, Arizona

Publications Posted on: November 16, 2009
Spruce aphid is an exotic insect recently introduced to the Pinaleno Mountains. It feeds on dormant Engelmann spruce, and possible effects include tree-growth suppression, tree mortality, and reduction in seed and cone production. Potential longer-term effects include changes in forest structure and species composition - primarily through reduction in Engelmann spruce dominance in spruce-fir and mixed-conifer forcsts.

Habitat selection is unaltered after severe insect infestation: Concerns for forest-dependent species

Publications Posted on: November 16, 2009
Severe disturbance may alter or eliminate important habitat structure that helps preserve food caches of foodhoarding species. Recent recolonization of an insect-damaged forest by the endangered Mt. Graham red squirrel (Tamiasciurus hudsonicus grahamensis) provided an opportunity to examine habitat selection for midden (cache) sites following disturbance.