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Keyword: Arizona


Publications Posted on: May 12, 2016
This volume addresses the wildlife and fish of the grasslands in the Southwestern Region of the USDA Forest Service. Our intent is to provide information that will help resource specialists and decisionmakers manage wildlife populations within grassland ecosystems in the Southwestern United States. The information and analysis presented is at a Regional scale.

Grassland Assessment Categories and Extent

Publications Posted on: May 12, 2016
This chapter establishes a general framework for describing the various kinds of grasslands outlined in subsequent chapters. This framework outlines the major categories or classes of grasslands that occur as part of Southwestern terrestrial ecosystems within National Forest System lands and provides an ecological and environmental context in regards to how they differ in their floristic, geographic, spatial, and climatic settings.

Dynamics of a pinyon-juniper stand in northern Arizona: a half-century history

Publications Posted on: May 12, 2016
This paper adds to the limited knowledge of stand dynamics in pinyon-juniper woodlands by reporting on the changes in species composition, numbers of trees, arrangements of trees, and total height and volume in a stand from late 1938 to early 1991. This information should be helpful in managing pinyon-juniper woodlands to sustain their productivity and maintain their multiple-use values.

Comparative habitat use of sympatric Mexican spotted and great horned owls

Publications Posted on: May 12, 2016
To provide information on comparative habitat use, we studied radiotagged Mexican spotted owls (Strix occidentalis lucida: n = 13) and great horned owls (Bubo virginianus: n = 4) in northern Arizona. Home-range size (95% adaptive kernel estimate) did not differ significantly between species during either the breeding or nonbreeding season.

Dynamics of coarse woody debris in southwestern mixed-conifer and ponderosa pine forests

Projects Posted on: October 09, 2015
Snags (standing dead trees) and logs are important components of forest landscapes. RMRS scientists established a series of fixed plots in 1997 for monitoring snag populations. This research has direct ramifications for 11 national forests throughout the Southwestern Region, as well as for our overall understanding of the ecology of coarse woody debris and effects of climate change on forest structure and composition.

Sierra Ancha Experimental Forest

Experimental Forests and Ranges Posted on: September 09, 2015
The U.S. Forest Service established the Sierra Ancha Experimental Forest in 1932 as a research area for studying watershed management. Located within the Tonto National Forest, the climate, soil, and landforms of the Sierra Ancha are representative of much of the southwestern region of the United States.

Simulating post-wildfire forest trajectories under alternative climate and management scenarios

Publications Posted on: July 08, 2015
Post-fire predictions of forest recovery under future climate change and management actions are necessary for forest managers to make decisions about treatments. We applied the Climate-Forest Vegetation Simulator (Climate-FVS), a new version of a widely used forest management model, to compare alternative climate and management scenarios in a severely burned multispecies forest of Arizona, USA.

Managing burned landscapes: Evaluating future management strategies for resilient forests under a warming climate

Publications Posted on: July 08, 2015
Climate change effects on forested ecosystems worldwide include increases in drought-related mortality, changes to disturbance regimes and shifts in species distributions. Such climate-induced changes will alter the outcomes of current management strategies, complicating the selection of appropriate strategies to promote forest resilience.

Coronado National Forest Draft Land and Resource Management Plan: Cochise, Graham, Pima, Pinal, and Santa Cruz Counties, Arizona, and Hidalgo County, New Mexico

Publications Posted on: April 21, 2015
The Coronado National Forest is an administrative component of the National Forest System. It administers 1,783,639 acres of National Forest System lands. National forests across the United States were established to provide natural resource-based goods and services to American citizens, and to protect timber and watershed resources. Management of national forests is jointly based on the principles of conservation and multiple use.

Lightning fires in southwestern forests

Publications Posted on: April 20, 2015
Lightning is the leading cause of fires in southwestern forests. On all protected private, state and federal lands in Arizona and New Mexico, nearly 80 percent of the forest, brush and range fires are ignited by lightning. The Southwestern region leads all other regions of the United States both in total number of lightning fires and in the area burned by these fires.