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Keyword: distribution

Maximum entropy-based bioclimatic models predict areas of current and future suitable habitat for Armillaria species in western Oregon and western Washington

Publications Posted on: September 30, 2020
Climate change is predicted to increase the impacts of Armillaria root disease as host trees become maladapted to their environment, escalating tree stress, and potentially increasing susceptibly to Armillaria pathogens (e.g., Klopfenstein et al. 2009, Kliejunas et al. 2009, Kliejunas 2011, Sturrock et al. 2011, Dempster 2017, Kubiak et al. 2017, Aslam & Magel 2018).

Status of Pacific Martens (Martes caurina) on the Olympic Peninsula, Washington

Publications Posted on: March 30, 2020
Pacific martens (Martes caurina) remain common in montane regions of the Pacific states, yet their distribution and status on the Olympic Peninsula, Washington, is uncertain. Between 1968–2008, six reliable marten detections exist; a dead juvenile female (2008) indicates martens were reproducing on the Peninsula within the last decade.

Spatial error analysis of species richness for a Gap Analysis map

Publications Posted on: December 13, 2019
Variation in the distribution of species richness as a result of introduced errors of omission and commission in the Gap Analysis database for Oregon was evaluated using Monte Carlo simulations. Random errors, assumed to be independent of a species' distribution, and boundary errors, assumed to be dependent on the species' distribution, were simulated using ten rodent species.

Forested wetland area and distribution: A detailed look at the South

Publications Posted on: December 13, 2019
Debate over the classification, protection, and management of forested wetlands has intensified in recent years. Federal agencies have classified US wetlands in various manners, leading to frequent protests by groups favoring more or less stringent criteria.

Wildland shrubs - their biology and utilization

Publications Posted on: July 31, 2019
Why Is a Shrub Symposium Needed? The answer to this question is obvious in view of the great volume of research that has been done with grasses and forbs while, in contrast, there has been considerably less research and development of shrubs. Yet, shrubs offer tremendous potentials for man's benefit in making the arid and semi - arid lands of the world more productive and useful.

Proceedings-research and management of bitterbrush and cliffrose in Western North America

Publications Posted on: February 26, 2019
Bitterbrush and cliff rose are perhaps the most widely managed shrubs in Western North America. This proceedings of 27 papers is a collection of our current knowledge on research and management of bitterbrush, cliffrose, and other rosaceous shrubs in Western North America.

The aquatic eDNAtlas project

Projects Posted on: February 08, 2018
The website provides: 1) A large list of supporting science behind eDNA sampling. 2) The recommended field protocol for eDNA sampling and the equipment loan program administered by the NGC. 3) A systematically-spaced sampling grid for all flowing waters of the U.S. in a downloadable format that includes unique database identifiers and geographic coordinates for all sampling sites. Available for download in an Geodatabase or available by ArcGIS Online map. This sampling grid can be used to determine your field collection sites to contribute. 4) The lab results of eDNA sampling at those sites where project partners have agreed to share data.


Projects Posted on: January 30, 2017
This NASA-sponsored project will test a variety of sensors and techniques used to collect and improve airborne and ground-based measurements to determine the snow-water equivalent (SWE), or the amount of water held in snow, over different terrains. This is significant because much of the worlds’, including the western U.S.’s water supply is derived from snow in mountain environments. Better information on SWE can improve hazard forecasting, water availability predictions, and agricultural forecasting, among other things. The SnowEx team includes more than 100 scientists from universities and agencies across the U.S., Europe, and Canada.

Big sagebrush: A sea fragmented into lakes, ponds, and puddles

Publications Posted on: May 12, 2016
Pioneers traveling along the Oregon Trail from western Nebraska, through Wyoming and southern Idaho and into eastern Oregon, referred to their travel as an 800 mile journey through a sea of sagebrush, mainly big sagebrush (Artemisia tridentata). Today approximately 50 percent of the sagebrush sea has given way to agriculture, cities and towns, and other human developments.

A snow-tracking protocol used to delineate local lynx, Lynx canadensis, distributions

Publications Posted on: January 22, 2016
Determining Canada Lynx (Lynx canadensis) distribution is an important management need, especially at the southern extent of the species range where it is listed as threatened under the U. S. Endangered Species Act. We describe a systematic snowtrack based sampling framework that provides reliable distribution data for Canada Lynx. We used computer simulations to evaluate protocol efficacy.