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Keyword: fragmentation

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.

Recent and projected future wildfire trends across the ranges of three spotted owl subspecies under climate change

Publications Posted on: April 08, 2019
A major task for researchers in the twenty-first century is to predict how climate-mediated stressors such as wildfires may affect biodiversity under climate change. Previous model predictions typically did not address non-stationarity in climate-fire relationships across time and space.

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.

Rangelands on the Edge: Quantifying the modification, fragmentation, and future residential development of U.S. rangelands

Publications Posted on: August 08, 2018
Rangelands are increasingly urban, subdivided, and fragmented. About 62 percent of coterminous U.S. rangelands occur on private land and are at further risk for conversion.

Managing emerging threats to spotted owls

Publications Posted on: May 10, 2018
The 3 spotted owl (Strix occidentalis) subspecies in North America (i.e., northern spotted owl [S. o. caurina], California spotted owl [S. o. occidentalis], Mexican spotted owl [S. o. lucida]) have all experienced population declines over the past century due to habitat loss and fragmentation from logging.

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.  

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.

Quantifying terrestrial habitat loss and fragmentation: A protocol

Publications Posted on: October 03, 2016
Anthropogenic habitat loss and fragmentation have been implicated as among the key drivers of the burgeoning global biodiversity crisis. In response, there is a growing mandate among natural resource managers to evaluate the impacts of proposed management actions on the extent and fragmentation of habitats.

The scientific basis for conserving forest carnivores: American marten, fisher, lynx, and wolverine in the western United States.

Publications Posted on: May 12, 2016
This cooperative effort by USDA Forest Service Research and the National Forest System assesses the state of knowledge related to the conservation status of four forest carnivores in the western United States: American marten, fisher, lynx, and wolverine. The conservation assessment reviews the biology and ecology of these species. It also discusses management considerations stemming from what is known and identifies information needed.

A multi-scale assessment of population connectivity in African lions (Panthera leo) in response to landscape change

Publications Posted on: October 22, 2015
Habitat loss and fragmentation are among the major drivers of population declines and extinction, particularly in large carnivores. Connectivity models provide practical tools for assessing fragmentation effects and developing mitigation or conservation responses.

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