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Keyword: mixed conifer

Chapter 2: Beginning of water studies in the Central Arizona Highlands

Publications Posted on: June 12, 2009
Water has been recognized as an important resource in central Arizona and has affected populations occupying the Salt River Valley for centuries. Water related activities have been documented since about 200 before the common era, when Hohokam Indians settled the Valley and constructed canals to irrigate their fields.

Chapter 1: Central Arizona Highlands

Publications Posted on: June 12, 2009
The Central Arizona Highlands are a distinct biogeographic, climatic, and physiographic province that forms a diverse ecotone between the larger Colorado Plateau to the north and the Sonoran Desert ecoregions to the south (figure 1). The Highlands coincide approximately with the Arizona Transition Zone identified by ecologists, geologists and others.

Fire treatment effects on vegetation structure, fuels, and potential fire severity in western U.S. forests

Publications Posted on: March 05, 2009
Forest structure and species composition in many western U.S. coniferous forests have been altered through fire exclusion, past and ongoing harvesting practices, and livestock grazing over the 20th century. The effects of these activities have been most pronounced in seasonally dry, low and mid-elevation coniferous forests that once experienced frequent, low to moderate intensity, fire regimes.

Ponderosa pine, mixed conifer, and spruce-fir forests [Chapter 2]

Publications Posted on: October 25, 2007
Before European settlement of the interior west of the United States, coniferous forests of this region were influenced by many disturbance regimes, primarily fires, insects, diseases, and herbivory, which maintained a diversity of successional stages and vegetative types across landscapes. Activities after settlement, such as fire suppression, grazing, and logging significantly altered these disturbance regimes.

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