Ecological effects of fear: How spatiotemporal heterogeneity in predation risk influences mule deer access to forage in a sky-island system

Ecology and Evolution
Christopher LowreyDaniel Thompson

Abstract

Forage availability and predation risk interact to affect habitat use of ungulates across many biomes. Within sky-island habitats of the Mojave Desert, increased availability of diverse forage and cover may provide ungulates with unique opportunities to extend nutrient uptake and/or to mitigate predation risk. We addressed whether habitat use and foraging patterns of female mule deer (Odocoileus hemionus) responded to normalized difference vegetation index (NDVI), NDVI rate of change (green-up), or the occurrence of cougars (Puma concolor). Female mule deer used available green-up primarily in spring, although growing vegetation was available during other seasons. Mule deer and cougar shared similar habitat all year, and our models indicated cougars had a consistent, negative effect on mule deer access to growing vegetation, particularly in summer when cougar occurrence became concentrated at higher elevations. A seemingly late parturition date coincided with diminishing NDVI during the lactation period. Sky-island populations, rarely studied, provide the opportunity to determine how mule deer respond to growing foliage along steep elevation and vegetation gradients when trapped with their predators and seasonally limited by ar...Continue Reading

References

Mar 27, 1999·Biochemical Society Transactions·V L Davidson
Jun 28, 2007·Ecology Letters·Matthew J KauffmanMark S Boyce
Feb 14, 1992·Science·D R Montgomery, W E Dietrich
Aug 8, 2009·Biological Reviews of the Cambridge Philosophical Society·Steven L Lima
Apr 16, 2014·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Mark A HurleyChristophe Bonenfant
May 3, 2014·Proceedings. Biological Sciences·Florian BarnierHervé Fritz
Jun 20, 2014·The Journal of Animal Ecology·Corinna Riginos
Nov 26, 2015·Ecology·Brian S Cade

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Citations

Mar 19, 2020·Ecology and Evolution·Carter L WolffBrandon T Barton

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Methods Mentioned

BETA
PCA

Software Mentioned

ArcInfo
SPSS

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