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Keyword: connectivity

Demographic fragmentation of a protected wolverine population bisected by a major transportation corridor

Publications Posted on: October 02, 2019
Roads fragment ecosystems around the globe, but the effects of this fragmentation on biodiversity remain poorly understood. Wolverines (Gulo gulo) are snow-dependent carnivores that occur at low densities and they exhibit low genetic diversity at the southern extent of their range where they are snow-limited and fragmented by human development.

Contrasting use of habitat, landscape elements, and corridors by grey wolf and golden jackal in central Iran

Publications Posted on: June 14, 2019
Context: Increasing carnivore-human conflict has threatened the survival of many carnivore species, thus evaluating habitat requirements, landscape connectivity and the protection of biological corridors is critical to guide conservation of carnivores.

Improving habitat and connectivity model predictions with multi-scale resource selection functions from two geographic areas

Publications Posted on: April 08, 2019
Context: Habitat loss and fragmentation are the most pressing threats to biodiversity, yet assessing their impacts across broad landscapes is challenging. Information on habitat suitability is sometimes available in the form of a resource selection function model developed from a different geographical area, but its applicability is unknown until tested.

Habitat fragmentation reduces genetic diversity and connectivity of the Mexican spotted owl: A simulation study using empirical resistance models

Publications Posted on: October 03, 2018
We evaluated how differences between two empirical resistance models for the same geographic area affected predictions of gene flow processes and genetic diversity for the Mexican spotted owl (Strix occidentalis lucida). The two resistance models represented the landscape under lowand high-fragmentation parameters.

Sustaining the Greater sage-grouse may come down to maintaining genetic connectivity

FS News Posted on: May 10, 2018
The Greater sage-grouse, once estimated to have a population of 16 million across the western United States, is now believed to be less than one million. The population decline is related to their habitat, much of which has been degraded by non-native grasses and fragmented by development. Because of the location-specific nature of their mating ritual, greater sage-grouse are particularly vulnerable to habitat disruption. New research builds the case for optimism for this species of concern. A new USDA Forest Service Rocky Mountain Research Station study, The genetic network of greater sage-grouse: range-wide identification of keystone hubs of connectivity, provides tools for decisionmakers to inform which areas of habitat are most critical to conserve, not just for the bird, but for other species as well.

Effects of climate change on wildlife in the Northern Rockies [Chapter 8]

Publications Posted on: September 22, 2017
Few data exist on the direct effects of climatic variability and change on animal species. Therefore, projected climate change effects must be inferred from what is known about habitat characteristics and the autecology of each species.

Sensitivity of resource selection and connectivity models to landscape definition

Publications Posted on: July 20, 2017
Context: The definition of the geospatial landscape is the underlying basis for species-habitat models, yet sensitivity of habitat use inference, predicted probability surfaces, and connectivity models to landscape definition has received little attention.

Sex-biased dispersal and spatial heterogeneity affect landscape resistance to gene flow in fisher

Publications Posted on: June 22, 2017
Genetic connectivity results from the dispersal and reproduction of individuals across landscapes. Mammalian populations frequently exhibit sex-biased dispersal, but this factor has rarely been addressed in individual-based landscape genetics research. In this study, we evaluate the effects of sexbiased dispersal and landscape heterogeneity on genetic connectivity in a small and isolated population of fisher (Pekania pennanti).

Socioeconomic conditions

Pages Posted on: February 06, 2017
Ecosystems are spatially explicit, relatively homogeneous units of the Earth that include all interacting organisms and elements of the abiotic environment within their boundaries. They should be described in terms of their composition, structure, function, and connectivity. These publications and tools include valuable information for terrestrial ecosystems, aquatic ecosystems, and watersheds.

All roads lead to Iran: Predicting landscape connectivity of the last stronghold for the critically endangered Asiatic cheetah

Publications Posted on: October 06, 2016
Effective conservation solutions for small and isolated wildlife populations depend on identifying and preserving critical biological corridors and dispersal routes. With a worldwide population of ≤70 individuals, the critically endangered Asiatic cheetah Acinonyx jubatus venaticus persists in several fragmented nuclei in Iran.