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17 May 2021 Seasonal habitat suitability models for a threatened species: the Gunnison sage-grouse
Anthony D. Apa, Kevin Aagaard, Mindy B. Rice, Evan Phillips, Daniel J. Neubaum, Nathan Seward, Julie R. Stiver, Scott Wait
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Abstract

Context. The Gunnison sage-grouse (Centrocercus minimus) has experienced range-wide declines and has been listed as Threatened by the USA Fish and Wildlife Service to receive protections under the USA Endangered Species Act. A draft Recovery Plan was recently completed. No seasonal habitat models have been developed for the small isolated populations.

Aims. To develop a habitat suitability model that was collaboratively developed between modellers and conservation practitioners to predict the probability of use by Gunnison sage-grouse during the breeding and summer seasons in designated occupied critical habitat, and extrapolate to adjacent designated unoccupied critical habitat.

Methods. We captured, marked and tracked Gunnison sage-grouse in nine different studies spanning 25 years. We used a suite of biotic, abiotic and vegetation local-level and population-scale covariates in a use-available resource selection function to develop models that predict the probability of use by Gunnison sage-grouse.

Key results. We used 9140 Gunnison sage-grouse locations from 406 individual birds to develop nine resource selection models for occupied habitat and extrapolated model predictions to adjacent unoccupied critical habitat in five small isolated Gunnison sage-grouse populations. A majority of our models validated well.

Conclusions. We report the first two-season resource use-based habitat suitability models for five of six small isolated Gunnison sage-grouse populations. Because of the unique habitat use by Gunnison sage-grouse in each population, we recommend that resource managers strategically target management actions in individual populations and avoid ‘one-size-fits-all’ habitat management prescriptions.

Implications. Our models will assist managers in the identification of seasonal habitats within populations to target management actions for Gunnison sage-grouse recovery.

© CSIRO 2021
Anthony D. Apa, Kevin Aagaard, Mindy B. Rice, Evan Phillips, Daniel J. Neubaum, Nathan Seward, Julie R. Stiver, and Scott Wait "Seasonal habitat suitability models for a threatened species: the Gunnison sage-grouse," Wildlife Research 48(7), 609-624, (17 May 2021). https://doi.org/10.1071/WR20006
Received: 14 January 2020; Accepted: 29 March 2021; Published: 17 May 2021
KEYWORDS
Centrocercus minimus
Colorado
Gunnison sage-grouse
habitat suitability model
occupied critical habitat
probability of use
recovery
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