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Keyword: gene flow

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.

Reproductive isolation and environmental adaptation shape the phylogeography of mountain pine beetle (Dendroctonus ponderosa)

Publications Posted on: June 01, 2018
Chromosomal rearrangement can be an important mechanism driving population differentiation and incipient speciation. In the mountain pine beetle (MPB, Dendroctonus ponderosae), deletions on the Y chromosome that are polymorphic among populations are associated with reproductive incompatibility.

Quantifying functional connectivity: The role of breeding habitat, abundance, and landscape features on range-wide gene flow in sage-grouse

Publications Posted on: May 11, 2018
Functional connectivity, quantified using landscape genetics, can inform conservation through the identification of factors linking genetic structure to landscape mechanisms.

Genetics research identifies Bengal tiger conservation opportunities

Science Spotlights Posted on: October 20, 2017
The Bengal tiger is the world’s largest feline, which has suffered immense declines in range and population. Today, less than 10 percent of the tiger's original range is occupied with a global population of less than 7000 individuals in the wild. Understanding the factors that drive local abundance and population connectivity are critical for the conservation of this species.  

Southwestern white pine - threats to the species in a changing world

Science Spotlights Posted on: October 19, 2017
Collaborative research is quantifying adaptive variation in tree species, specifically in southwestern white pine, across the western United States. This research predicts changes in species distribution and their ability to adapt in the face of global change by combining population-wide genomic data collection, common garden manipulative experiments, pathogen resistance trials, and simulation modeling.

Conserving threatened riparian ecosystems in the American West: Precipitation gradients and river networks drive genetic connectivity and diversity in a foundation riparian tree (Populus angustifolia)

Publications Posted on: September 25, 2017
Gene flow is an evolutionary process that supports genetic connectivity and contributes to the capacity of species to adapt to environmental change. Yet, for most species, little is known about the specific environmental factors that influence genetic connectivity, or their effects on genetic diversity and differentiation.

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).

Genetic diversity and structure of an endangered desert shrub and the implications for conservation

Publications Posted on: May 24, 2017
Population genetic information can provide valuable insight for the conservation and management of threatened and endangered plant species. Tamarix taklamakanensis is an endangered shrub endemic to arid basins of northwestern China. This species serves to stabilize soils in this region, but has seen substantial loss in its abundance due to depletion of ground water.

Hybridization between Dalmatian and yellow toadflax

Media Gallery Posted on: May 12, 2017
Two closely related invasive Linaria species, Dalmatian toadflax and yellow toadflax, have successfully invaded a broad range of ecosystems throughout most of continental North America. The management challenge imposed by the landscape scale of many toadflax infestations, particularly in the West, is further complicated by hybridization between these two weeds.

Looks aren’t everything: Hybridization between Dalmatian and yellow toadflax

Science Spotlights Posted on: May 11, 2017
Two closely related invasive Linaria species, Dalmatian toadflax (Linaria dalmatica) and yellow toadflax (Linaria vulgaris), have successfully invaded a broad range of ecosystems throughout most of continental North America. The management challenge imposed by the landscape scale of many toadflax infestations, particularly in the West, is further complicated by hybridization between these two weeds. Herbicide and biological control treatments for invasive Linaria are highly species-specific, necessitating the development of a molecular diagnostic tool that can accurately confirm when cryptic hybridization has spontaneously occurred in the field, particularly in plants conforming to typical species appearance.

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