Models of regional habitat quality and connectivity for pumas (Puma concolor) in the Southwestern United States

Brett G Dickson, Gary W. Roemer, Brad H. McRae, Jill M. Rundall

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The impact of landscape changes on the quality and connectivity of habitats for multiple wildlife species is of global conservation concern. In the southwestern United States, pumas (Puma concolor) are a well distributed and wide-ranging large carnivore that are sensitive to loss of habitat and to the disruption of pathways that connect their populations. We used an expert-based approach to define and derive variables hypothesized to influence the quality, location, and permeability of habitat for pumas within an area encompassing the entire states of Arizona and New Mexico. Survey results indicated that the presence of woodland and forest cover types, rugged terrain, and canyon bottom and ridgeline topography were expected to be important predictors of both high quality habitat and heightened permeability. As road density, distance to water, or human population density increased, the quality and permeability of habitats were predicted to decline. Using these results, we identified 67 high quality patches across the study area, and applied concepts from electronic circuit theory to estimate regional patterns of connectivity among these patches. Maps of current flow among individual pairs of patches highlighted possible pinch points along two major interstate highways. Current flow summed across all pairs of patches highlighted areas important for keeping the entire network connected, regardless of patch size. Cumulative current flow was highest in Arizona north of the Colorado River and around Grand Canyon National Park, and in the Sky Islands region owing to the many small habitat patches present. Our outputs present a first approximation of habitat quality and connectivity for dispersing pumas in the southwestern United States. Map results can be used to help target finer-scaled analyses in support of planning efforts concerned with the maintenance of puma metapopulation structure, as well as the protection of landscape features that facilitate the dispersal process.

Original languageEnglish (US)
Article numbere81898
JournalPLoS One
Volume8
Issue number12
DOIs
StatePublished - Dec 18 2013

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Puma
Southwestern United States
Puma concolor
Ecosystem
Circuit theory
Highway systems
habitats
Topography
Conservation
permeability
Rivers
Permeability
canyons
Planning
Water
Networks (circuits)
electronic circuits
Colorado River
landscape management
habitat destruction

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Models of regional habitat quality and connectivity for pumas (Puma concolor) in the Southwestern United States. / Dickson, Brett G; Roemer, Gary W.; McRae, Brad H.; Rundall, Jill M.

In: PLoS One, Vol. 8, No. 12, e81898, 18.12.2013.

Research output: Contribution to journalArticle

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