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Keyword: forest structure

Using structural sustainability for forest health monitoring and triage: Case study of a mountain pine beetle (Dendroctonusponderosae)-impacted landscape

Publications Posted on: August 16, 2016
Heavy disturbance-induced mortality can negatively impact forest biota, functions, and services by drastically altering the forest structures that create stable environmental conditions. Disturbance impacts on forest structure can be assessed using structural sustainability - the degree of balance between living and dead portions of a tree population’s size-class distribution - which is the basis of baseline mortality analysis.

Mountain pine beetles: A century of knowledge, control attempts, and impacts central to the Black Hills

Publications Posted on: August 16, 2016
This publication chronicles the understanding, controlling, and impacts of mountain pine beetles (MPB) central to the Black Hills of South Dakota and Wyoming from the time they were described by Hopkins in 1902, through the presentation of data from work started by Schmid and Mata in 1985. The plots established by these two men from 1985 through 1994 were subjected to the most intense MPB stress to occur since 1900 in the Black Hills.

Here today, here tomorrow: Managing forests for fisher habitat in the Northern Rockies

Publications Posted on: August 09, 2016
The fisher is a unique member of the weasel family and a sensitive species in the northern Rockies. They were almost extirpated by trapping in the early twentieth century, but these animals (a mix between a native and introduced population) now inhabit a swath of mesic coniferous forests in Idaho and Montana.

Root diseases in coniferous forests of the Inland West: potential implications of fuels treatments

Publications Posted on: May 12, 2016
After nearly 100 years of fire exclusion, introduced pests, and selective harvesting, a change in forest composition has occurred in many Inland West forests of North America. This change in forest structure has frequently been accompanied by increases in root diseases and/or an unprecedented buildup of fuels. Consequently, many forest managers are implementing plans for fuels treatments to lower the risk of severe wildfires.

Influence of forest structure on the abundance of snowshoe hares in western Wyoming

Publications Posted on: January 19, 2016
Snowshoe hares (Lepus americanus) are a primary prey species for Canada lynx (Lynx canadensis) in western North America. Lynx management plans require knowledge of potential prey distribution and abundance in the western United States. Whether even-aged regenerating forests or multi-storied forests contain more snowshoe hares is currently unknown.

Fort Valley Experimental Forest

Experimental Forests and Ranges Posted on: September 09, 2015
The first Forest Service research facility established in the Nation, the Fort Valley Experimental Forest (formerly the Coconino Experiment Station) opened in August 1908. Researchers past and present at Fort Valley have studied natural and artificial regeneration, stand improvement, sample plots, climate—everything that might influence a tree throughout its life.

Forest canopy effects on snow accumulation and ablation: an integrative review of empirical results

Publications Posted on: July 28, 2015
The past century has seen significant research comparing snow accumulation and ablation in forested and open sites. In this review we compile and standardize the results of previous empirical studies to generate statistical relations between changes in forest cover and the associated changes in snow accumulation and ablation rate.

Northern goshawk and its prey in the Black Hills: Habitat assessment

Publications Posted on: July 16, 2015
The northern goshawk is classified as a Sensitive Species in all USDA Forest Service regions, including on the Black Hills National Forest in western South Dakota and northeastern Wyoming. An assessment was conducted of the quality of northern goshawk nesting and foraging habitat, along with the habitat quality of 22 of the goshawk’s prey species.

Discriminating disturbance from natural variation with LiDAR in semi-arid forests in the southwestern USA

Publications Posted on: July 13, 2015
Discriminating amongst spatial configurations and climax size of trees in forests along varying physical gradients from time since last disturbance is a significant component of applied forest management.

Ecology of Mexican spotted owls in the Sacramento Mountains, New Mexico

Science Spotlights Posted on: May 20, 2015
RMRS scientists recently completed a 10 year study of a population of threatened Mexican spotted owls (Strix occidentalis lucida) in the Sacramento Mountains, New Mexico. This study evaluated demography, habitat use, and diet composition of spotted owls, as well as forest structure characteristic of owl habitat. We determined that most owl nests are located in wet mixed-conifer forests not greatly in need of ecological restoration.