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Keyword: Ursus americanus

Wildlife dispersal ability and landscape connectivity in the northern Rocky Mountains

Science Spotlights Posted on: October 14, 2015
Increasing human populations have fueled urban development and land conversion, causing substantial loss and fragmentation of wildlife habitat. Researchers evaluated conditions for 108 different species across a large portion of the Northern Rockies in order to predict current and potential future patterns of fragmentation, prioritize keystone corridors for protection and enhancement, and identify which species in which places might require habitat restoration or assisted migration.

Cost-efficient selection of a marker panel in genetic studies

Publications Posted on: September 19, 2013
Genetic techniques are frequently used to sample and monitor wildlife populations. The goal of these studies is to maximize the ability to distinguish individuals for various genetic inference applications, a process which is often complicated by genotyping error. However, wildlife studies usually have fixed budgets, which limit the number of geneticmarkers available for inclusion in a study marker panel.

Detecting genotyping errors and describing black bear movement in northern Idaho

Publications Posted on: December 12, 2012
Non-invasive genetic sampling has become a favored tool to enumerate wildlife. Genetic errors, caused by poor quality samples, can lead to substantial biases in numerical estimates of individuals.

Why replication is important in landscape genetics: American black bear in the Rocky Mountains

Publications Posted on: October 05, 2011
We investigated how landscape features influence gene flow of black bears by testing the relative support for 36 alternative landscape resistance hypotheses, including isolation by distance (IBD) in each of 12 study areas in the north central U.S. Rocky Mountains. The study areas all contained the same basic elements, but differed in extent of forest fragmentation, altitude, variation in elevation and road coverage.

Movement behavior explains genetic differentiation in American black bears

Publications Posted on: March 30, 2011
Individual-based landscape genetic analyses provide empirically based models of gene flow. It would be valuable to verify the predictions of these models using independent data of a different type. Analyses using different data sources that produce consistent results provide strong support for the generality of the findings. Mating and dispersal movements are the mechanisms through which gene flow operates in animal populations.

Use of empirically derived source-destination models to map regional conservation corridors

Publications Posted on: February 02, 2009
The ability of populations to be connected across large landscapes via dispersal is critical to longterm viability for many species. One means to mitigate population isolation is the protection of movement corridors among habitat patches. Nevertheless, the utility of small, narrow, linear features as habitat corridors has been hotly debated.

Gene flow in complex landscapes: Testing multiple hypotheses with causal modeling

Publications Posted on: August 28, 2007
Predicting population-level effects of landscape change depends on identifying factors that influence population connectivity in complex landscapes. However, most putative movement corridors and barriers have not been based on empirical data.