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Keyword: Pinus ponderosa

Phenotypic selection on ponderosa pine seed and seedling traits in the field under three experimentally manipulated drought treatments

Publications Posted on: May 23, 2019
Drought-related selection during seedling emergence and early development may play a strong role in adaptation. Yet this process is poorly understood and particularly so in relation to ongoing climate change.

Doughnuts don’t make trees fatter

Science Spotlights Posted on: May 06, 2019
Large, old trees, often called legacy trees, serve a foundational role in old-growth forests. Restoration efforts to improve vigor of legacy trees and decrease risk to high-intensity wildland fire and drought-mediated insect mortality often include reductions in stand density. However, sometimes regulatory and social constraints limit stand-level thinning options by requiring maintenance of closed canopies.

GENGYM: A variable density stand table projection system calibrated for mixed conifer and ponderosa pine stands in the Southwest

Publications Posted on: February 26, 2019
A computerized growth and yield model based on a variable density stand table projection system using 1-inch-wide diameter classes has been developed for projecting expected stand conditions in southwestern mixed conifer and ponderosa pine stands, including the effects of dwarf mistletoe. Stand management options include both even-aged and uneven-aged cutting methods.

Fuel dynamics after a bark beetle outbreak impacts experimental fuel treatments

Publications Posted on: January 30, 2019
Background: Fuel reduction treatments have been widely implemented across the western US in recent decades for both fire protection and restoration. Although research has demonstrated that combined thinning and burning effectively reduces crown fire potential in the few years immediately following treatment, little research has identified effectiveness of thinning and burning treatments beyond a decade.

Condition of live fire-scarred ponderosa pine twenty-one years after removing partial cross-sections

Publications Posted on: October 05, 2018
Concern over the effects of removing fire-scarred partial cross-sections may limit sampling of live ponderosa pine to reconstruct fire history. We report mortality rates for ponderosa pine trees 20 to 21 years after removing fire-scarred partial cross-sections to reconstruct fire history.

Assessing high-cost wildfires in relation to the natural distribution of ponderosa pine in the 11 Western states (2000-2017)

Publications Posted on: October 04, 2018
In this analysis we introduce a broad-scale long-term overview of the US West’s costliest wildfires in relation to the natural distribution of ponderosa pine (Pinus ponderosa). The species is dependent on frequent, low-intensity burning, but in absence of this function, it has become one of the region’s most altered ecosystems (U.S. Government Accounting Office, 1999; U.S.D.A.

Effects and interactions of fire, logging, and grazing

Publications Posted on: August 01, 2018
In this chapter, we summarize current knowledge about the effects of fire, logging, and grazing on coniferous forest birds and their habitats. We critically review the results of studies evaluating how these individual factors influence bird numbers, species diversity, nesting success, and habitat use in ponderosa pine forests.

Summary (Songbird ecology in southwestern ponderosa pine forests: A literature review)

Publications Posted on: August 01, 2018
Most ornithological studies in Southwestern ponderosa pine forests have yielded results that are applicable only to the specific location and particular conditions of the study areas (for example, Green 1979 and Hurlbert 1984).

Characterizing spatial neighborhoods of refugia following large fires in northern New Mexico, USA

Publications Posted on: July 10, 2018
The spatial patterns resulting from large fires include refugial habitats that support surviving legacies and promote ecosystem recovery. To better understand the diverse ecological functions of refugia on burn mosaics, we used remotely sensed data to quantify neighborhood patterns of areas relatively unchanged following the 2011 Las Conchas fire.

Biochar effects on the nursery propagation of 4 northern Rocky Mountain native plant species

Publications Posted on: May 10, 2018
Biochar has emerged as a promising potential amendment of soilless nursery media for plant propagation.