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Keyword: forest structure

Restoring composition and structure in Southwestern frequent-fire forests: A science-based framework for improving ecosystem resiliency

Publications Posted on: September 30, 2013
Ponderosa pine and dry mixed-conifer forests in the Southwest United States are experiencing, or have become increasingly susceptible to, large-scale severe wildfire, insect, and disease episodes resulting in altered plant and animal demographics, reduced productivity and biodiversity, and impaired ecosystem processes and functions.

Nesting habitat of Mexican spotted owls in the Sacramento Mountains

Publications Posted on: September 10, 2013
Understanding the habitat relationships of rare species is critical to conserving populations and habitats of those species. Nesting habitat is suspected to limit distribution of the threatened Mexican spotted owl (Strix occidentalis lucida), and may vary among geographic regions. We studied selection of nesting habitat by Mexican spotted owls within their home ranges in the Sacramento Mountains, New Mexico.

Multicentury fire and forest histories at 19 sites in Utah and eastern Nevada

Publications Posted on: December 14, 2011
Our objective is to provide site-specific fire and forest histories from Utah and eastern Nevada that can be used for land management or additional research. We systematically sampled fire scars and tree-recruitment dates across broad gradients in elevation and forest type at 13 sites in Utah and 1 in eastern Nevada to characterize spatial and temporal variation in historical fire regimes as well as forest structure and composition.

Mapping snags and understory shrubs for LiDAR based assessment of wildlife habitat suitability

Publications Posted on: October 07, 2010
The lack of maps depicting forest three-dimensional structure, particularly as pertaining to snags and understory shrub species distribution, is a major limitation for managing wildlife habitat in forests. Developing new techniques to remotely map snags and understory shrubs is therefore an important need.

Thinning and prescribed fire effects on overstory tree and snag structure in dry coniferous forests of the interior Pacific Northwest

Publications Posted on: April 07, 2010
Forest thinning and prescribed fires are practices used by managers to address concerns over ecosystem degradation and severe wildland fire potential in dry forests. There is some debate, however, about treatment effectiveness in meeting management objectives as well as their ecological consequences.

Tree squirrel habitat selection and predispersal seed predation in a declining subalpine conifer

Publications Posted on: March 04, 2010
Differential responses by species to modern perturbations in forest ecosystems may have undesirable impacts on plant-animal interactions. If such disruptions cause declines in a plant species without corresponding declines in a primary seed predator, the effects on the plant could be exacerbated.

Characterizing forest succession with lidar data: An evaluation for the Inland Northwest, USA

Publications Posted on: April 10, 2009
Quantifying forest structure is important for sustainable forest management, as it relates to a wide variety of ecosystem processes and services. Lidar data have proven particularly useful for measuring or estimating a suite of forest structural attributes such as canopy height, basal area, and LAI. However, the potential of this technology to characterize forest succession remains largely untested.

Predicting the effects of forest management on lynx populations

Publications Posted on: April 03, 2009
Lynx are quintessential snowshoe hare predators with morphological adaptations such as large paws. This species depends on boreal forests, so the listing of Canada Lynx as a Threatened species is a major conservation issue to forest managers. The U.S.

Forest structure and downed woody debris in boreal temperate, and tropical forest fragments

Publications Posted on: March 19, 2009
Forest fragmentation affects the heterogeneity of accumulated fuels by increasing the diversity of forest types and by increasing forest edges. This heterogeneity has implications in how we manage fuels, fire, and forests. Understanding the relative importance of fragmentation on woody biomass within a single climatic regime, and along climatic gradients, will improve our ability to manage forest fuels and predict fire behavior.

Forest structure estimation and pattern exploration from discrete return lidar in subalpine forests of the Central Rockies

Publications Posted on: September 04, 2008
This study evaluates the relative ability of simple light detection and ranging (lidar) indices (i.e., mean and maximum heights) and statistically derived canonical correlation analysis (CCA) variables attained from discrete-return lidar to estimate forest structure and forest biomass variables for three temperate subalpine forest sites.

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