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Keyword: Long Valley Experimental Forest

Tree ecophysiology research at Taylor Woods

Publications Posted on: March 26, 2009
We summarize the key findings of tree ecophysiology studies performed at Taylor Woods, Fort Valley Experimental Forest, Arizona between 1994 and 2003 that provide unique insight on impacts of long-term stand density management in ponderosa pine forests on tree water relations, leaf gas exchange, radial growth, leaf area-to-sapwood-area ratio, growth efficiency, leaf area index, resin defenses, and stand-level above-ground carbon sequestration.

Understanding ponderosa pine forest-grassland vegetation dynamics at Fort Valley Experimental Forest using phytolith analysis

Publications Posted on: March 26, 2009
In the last century, ponderosa pine forests in the Southwest have changed from more open park-like stands of older trees to denser stands of younger, small-diameter trees. Considerable information exists regarding ponderosa pine forest fire history and recent shifts in stand structure and composition, yet quantitative studies investigating understory reference conditions are lacking.

Dynamics of buckbrush populations under simulated forest restoration alternatives

Publications Posted on: March 26, 2009
Plant population models are valuable tools for assessing ecological tradeoffs between forest management approaches. In addition, these models can provide insight on plant life history patterns and processes important for persistence and recovery of populations in changing environments.

A century of meteorological observations at Fort Valley Experimental Forest: A cooperative observer program success story

Publications Posted on: March 26, 2009
Meteorological observations at Fort Valley Experimental Forest began with its establishment as early silvicultural research made heavy use of meteorological data. The Fort Valley weather data represent the longest climatological record for northern Arizona with records dating back to 1909. Importance of long-term meteorological records and access to the weather record are described.

The resin composition of ponderosa pine (Pinus ponderosa) attacked by the roundheaded pine beetle (Dendroctonus adjunctus) (Coleoptera: Curculionidae, Scolytinae)

Publications Posted on: March 26, 2009
Dendroctonus adjunctus is an aggressive bark beetle species that attacks several species of pine throughout its range from southern Utah and Colorado south to Guatemala. A current outbreak of D. adjunctus provided a unique opportunity to study the relationship between this beetle and pine resin chemistry in northern Arizona. We compared the resin composition of trees that had been attacked by D.

Growth of a 45-year-old ponderosa pine plantation: An Arizona case study

Publications Posted on: March 26, 2009
Information on the growth of forest plantations is necessary for planning of ecosystem-based management of the plantations. This information is also useful in validating or refining computer simulators that estimate plantation growth into the future. Such growth information has been obtained from a 45-year-old ponderosa pine (Pinus ponderosa) plantation in the Hart Prairie area north of the Fort Valley Experimental Forest headquarters.

The U.S. Geological Survey Paleomagnetics Laboratory at Fort Valley Experimental Forest-1970-1991

Publications Posted on: March 26, 2009
The United States Geological Survey (USGS) Paleomagnetics Laboratory was established in 1970, when Dr. Donald P. Elston of USGS negotiated with officials of the U.S. Forest Service in Flagstaff for the use of several buildings at the Fort Valley Experimental Forest (FVEF).

Pine regeneration following wildland fire

Publications Posted on: March 26, 2009
Pine regeneration following wildland fire continues to be a serious problem across the western and southeastern U.S. Frequency of large wildfires has increased over the last several decades and restoration of these burned areas is a major problem confronting land managers. Prescribed fires are used primarily to reduce heavy fuel loads and secondarily to reduce competition or prepare sites for natural or planted pine regeneration.

Forest structure and tree recruitment changes on a permanent historical Cinder Hills plot over a 130-Year Period

Publications Posted on: March 26, 2009
We examined forest structure, tree recruitment, and spatial pattern over a 130-year period on cinder soils in northern Arizona. Data were collected from a 3.24 ha permanent, stem-mapped plot established in 1909. This site is unique in that it represents ponderosa pine (Pinus ponderosa Laws. var. scopulorum Engelm.) growing on black cinder soils, which are of limited extent in the Southwest.

Historical and contemporary lessons from ponderosa pine genetic studies at the Fort Valley Experimental Forest, Arizona

Publications Posted on: March 25, 2009
Forest management will protect genetic integrity of tree species only if their genetic diversity is understood and considered in decision-making. Genetic knowledge is particularly important for species such as ponderosa pine (Pinus ponderosa Dougl. ex Laws.) that are distributed across wide geographic distances and types of climates.