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Keyword: habitat loss

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.

Simulating impacts of rapid forest loss on population size, connectivity and genetic diversity of Sunda clouded leopards (Neofelis diardi) in Borneo

Publications Posted on: September 26, 2018
Habitat loss is the greatest threat to biodiversity in Borneo, and to anticipate and combat its effects it is important to predict the pattern of loss and its consequences. Borneo is a region of extremely high biodiversity from which forest is being lost faster than in any other.

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.  

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.

Sage grouse population connectivity and landscape change

Science Spotlights Posted on: July 30, 2015
Recent connectivity assessments for the greater sage-grouse (Centrocercus urophasianus) in the Columbia Basin, Washington, provide an opportunity to (1) evaluate approaches for parameterizing resistance models based on sage grouse specifically or the concept of landscape integrity, (2) derive parameters from expert or empirical data, and (3) explore the influence of scale on model accuracy. Sage grouse in this region occupy a small fraction of their former range and are now threatened by extinction.

UNICOR Users Manual

Publications Posted on: May 23, 2012
Habitat loss and its effects on populations of vulnerable species is among the most urgent problems in conservation ecology. It is critical that managers and scientists have effective tools to evaluate the effects of landuse and climate change on the extent and connectivity of populations. To address this need, we introduce UNIversal CORridor network simulator (UNICOR), a species connectivity and corridor identification tool.

Human impacts on regional avian diversity and abundance

Publications Posted on: September 04, 2008
Patterns of association between humans and biodiversity typically show positive, negative, or negative quadratic relationships and can be described by 3 hypotheses: biologically rich areas that support high human population densities co-occur with areas of high biodiversity (productivity); biodiversity decreases monotonically with increasing human activities (ecosystem stress); and biodiversity peaks at intermediate levels of human influence (

Effects of habitat loss and fragmentation on amphibians: A review and prospectus

Publications Posted on: July 24, 2007
Habitat loss and fragmentation are among the largest threats to amphibian populations. However, most studies have not provided clear insights into their population-level implications. There is a critical need to investigate the mechanisms that underlie patterns of distribution and abundance.

Effect of reproductive rate on minimum habitat requirements of forest-breeding birds

Publications Posted on: July 07, 2006
A major challenge facing conservation biologists and wildlife managers is to predict how fauna will respond to habitat loss. Different species require different amounts of habitat for population persistence, and species’ reproductive rates have been identified as one of the major factors affecting these habitat-amount requirements.