New methods and hierarchical models for estimating intensity of diurnal habitat use by merriam’s turkeys in managed forests of northern Arizona

Brett G Dickson, Vincent J. Frary, Steven E. Sesnie, Jill M. Rundall, Michael F. Ingraldi

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

The response of native wildlife species to habitat change and the increased pace of large-scale forest restoration and fuels reduction treatments in managed forests of the southwestern United States is not well studied. Thus, there is a need to develop contemporary statistical models for evaluating the effect of these activities on animal populations prior to extensive and rapid habitat modification while accounting for small sample sizes typical of many field efforts. We used a maximum likelihood-based modeling framework to estimate seasonal intensity of diurnal habitat use by a population of Merriam’s turkeys (Meleagris gallopavo merriami) occupying a ponderosa pine (Pinus ponderosa) forest in northern Arizona. Using an information-theoretic approach and multimodel inference, we fitted linear mixed models that were capable of accommodating high-resolution global positioning system data on turkeys. We accounted for spatial and temporal structuring in these locational data and incorporated multiple random effects. We considered a modest number (12) of key habitat variables (i.e., fixed effects) in these models that were specified a priori and included remote sensing-derived, high-resolution data on forest structure. On average, fixed kernel estimates of summer home range and core area use were larger than winter estimates. Relationships between the intensity of use\and habitat variables were different in each season, and digitally derived estimates of forest structure and vegetation often were strong predictors. In both seasons turkeys tended to use areas closer to small canopy gaps but not use areas with high densities of forest edge or that were proximate to tertiary roads. Low and intermediate values of the normalized difference vegetation index, derived as a surrogate measure of the amount of deciduous or herbaceous understory vegetation on a site, were also important predictors of use in the summer and winter respectively. Individuals showed greater habitat use in canyon bottoms and steeper terrain at higher elevations, as well as areas closer to water in the summer. During the winter season, we detected a strong positive relationship with areas that were thinned or burned in previous years. Our results provide insight into which forest or habitat parameters are contributing to the intensity of habitat use by Merriam’s turkeys and will help to mitigate the adverse timing or targeting of large-scale forest restoration and fuels reduction treatments. Our modeling approach is highly transferable to the management and conservation of other species and ecosystems.

Original languageEnglish (US)
Title of host publicationThe Colorado Plateau VI: Science and Management at the Landscape Scale
PublisherUniversity of Arizona Press
Pages41-59
Number of pages19
ISBN (Print)9780816502356, 9780816531592
StatePublished - Jan 1 2015

Fingerprint

habitat use
habitat
Ecosystem
Turkey
habitats
Pinus ponderosa
fuels (fire ecology)
forest restoration
methodology
winter
restoration
summer
canopy gap
Southwestern United States
forest edge
vegetation
Homing Behavior
canopy gaps
method
Forests

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Earth and Planetary Sciences(all)
  • Social Sciences(all)
  • Environmental Science(all)

Cite this

Dickson, B. G., Frary, V. J., Sesnie, S. E., Rundall, J. M., & Ingraldi, M. F. (2015). New methods and hierarchical models for estimating intensity of diurnal habitat use by merriam’s turkeys in managed forests of northern Arizona. In The Colorado Plateau VI: Science and Management at the Landscape Scale (pp. 41-59). University of Arizona Press.

New methods and hierarchical models for estimating intensity of diurnal habitat use by merriam’s turkeys in managed forests of northern Arizona. / Dickson, Brett G; Frary, Vincent J.; Sesnie, Steven E.; Rundall, Jill M.; Ingraldi, Michael F.

The Colorado Plateau VI: Science and Management at the Landscape Scale. University of Arizona Press, 2015. p. 41-59.

Research output: Chapter in Book/Report/Conference proceedingChapter

Dickson, BG, Frary, VJ, Sesnie, SE, Rundall, JM & Ingraldi, MF 2015, New methods and hierarchical models for estimating intensity of diurnal habitat use by merriam’s turkeys in managed forests of northern Arizona. in The Colorado Plateau VI: Science and Management at the Landscape Scale. University of Arizona Press, pp. 41-59.
Dickson BG, Frary VJ, Sesnie SE, Rundall JM, Ingraldi MF. New methods and hierarchical models for estimating intensity of diurnal habitat use by merriam’s turkeys in managed forests of northern Arizona. In The Colorado Plateau VI: Science and Management at the Landscape Scale. University of Arizona Press. 2015. p. 41-59
Dickson, Brett G ; Frary, Vincent J. ; Sesnie, Steven E. ; Rundall, Jill M. ; Ingraldi, Michael F. / New methods and hierarchical models for estimating intensity of diurnal habitat use by merriam’s turkeys in managed forests of northern Arizona. The Colorado Plateau VI: Science and Management at the Landscape Scale. University of Arizona Press, 2015. pp. 41-59
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