North American Pika (<i>Ochotona princeps</i>) as a Late Quaternary Biogeographic Indicator Species

Hafner, David J.

doi:10.1006/qres.1993.1044

Cited by 90 publications

(114 citation statements)

References 17 publications

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“…Ochotona first appeared in North America during the Hemphillian land mammal age (late Pliocene) (Mead, 1987). Fossils of O. princeps have been reported in the literature from 44 sites from the Late Pleistocene and the Holocene records (Hafner, 1993).…”

Section: Evolutionary Processesmentioning

confidence: 99%

Molecular Systematics of Pikas (Genus Ochotona) Inferred from Mitochondrial DNA Sequences

Ning

Zheng

Zhang

et al. 2000

Molecular Phylogenetics and Evolution

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Section: Evolutionary Processesmentioning

confidence: 99%

Molecular Systematics of Pikas (Genus Ochotona) Inferred from Mitochondrial DNA Sequences

Ning

Zheng

Zhang

et al. 2000

Molecular Phylogenetics and Evolution

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“…Using hundreds of museum records of O . princeps , Hafner [37,38] proposed the species as a biogeographic indicator of cool, mesic, rocky habitat. He derived an equation for “pika-equivalent elevation,” which predicts the minimum elevation of pika occupancy at a site, given its latitude and longitude: E (in m) = 14087 –(56.6)*°N– 82.9*°W.…”

Section: Introductionmentioning

confidence: 99%

Predictors of Current and Longer-Term Patterns of Abundance of American Pikas (Ochotona princeps) across a Leading-Edge Protected Area

et al. 2016

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American pikas (Ochotona princeps) have been heralded as indicators of montane-mammal response to contemporary climate change. Pikas no longer occupy the driest and lowest-elevation sites in numerous parts of their geographic range. Conversely, pikas have exhibited higher rates of occupancy and persistence in Rocky Mountain and Sierra Nevada montane ‘mainlands’. Research and monitoring efforts on pikas across the western USA have collectively shown the nuance and complexity with which climate will often act on species in diverse topographic and climatic contexts. However, to date no studies have investigated habitat, distribution, and abundance of pikas across hundreds of sites within a remote wilderness area. Additionally, relatively little is known about whether climate acts most strongly on pikas through direct or indirect (e.g., vegetation-mediated) mechanisms. During 2007–2009, we collectively hiked >16,000 km throughout the 410,077-ha Glacier National Park, Montana, USA, in an effort to identify topographic, microrefugial, and vegetative characteristics predictive of pika abundance. We identified 411 apparently pika-suitable habitat patches with binoculars (in situ), and surveyed 314 of them for pika signs. Ranking of alternative logistic-regression models based on AICc scores revealed that short-term pika abundances were positively associated with intermediate elevations, greater cover of mosses, and taller forbs, and decreased each year, for a total decline of 68% during the three-year study; whereas longer-term abundances were associated only with static variables (longitude, elevation, gradient) and were lower on north-facing slopes. Earlier Julian date and time of day of the survey (i.e., midday vs. not) were associated with lower observed pika abundance. We recommend that wildlife monitoring account for this seasonal and diel variation when surveying pikas. Broad-scale information on status and abundance determinants of montane mammals, especially for remote protected areas, is crucial for land and wildlife-resource managers trying to anticipate mammalian responses to climate change.

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“…Contemporary mark -recapture and genetic data suggest a usually high degree of philopatry (Smith 1974a, but see Peacock andRay 2001). Furthermore, the species ' relatively complete paleontological record demonstrates that the species ' range has expanded and contracted in response to climatic fl uctuations across geologic time (Hafner 1993). mortality under) acute-heat stress, when it is disallowed behavioral thermoregulation (Smith 1974b).…”

mentioning

confidence: 99%

Not‐so‐splendid isolation: modeling climate‐mediated range collapse of a montane mammalOchotonaprinceps across numerous ecoregions

Calkins¹,

Beever²,

Boykin³

et al. 2012

Ecography

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We modeled current and future distribution of suitable habitat for the talus-obligate montane mammal Ochotona princeps (American pika) across the western USA under increases in temperature associated with contemporary climate change, to: a) compare forecasts using only climate variables vs using those plus habitat considerations; b) identify possible patterns of range collapse (center vs margins, and large-vs small-sized patches); and c) compare conservation and management implications of changes at two taxonomic resolutions, and using binned-vs binaryprobability maps. We used MaxEnt to analyze relationships between occurrence records and climatic variables to develop a bioclimatic-envelope model, which we refi ned by masking with a deductive appropriate-habitat fi lter based on suitable land-cover types. We used this fi nal species-distribution model to predict distribution of suitable habitat under range-wide temperature increases from 1 to 7 ° C, in 1 ° C increments; we also compared these results to distribution under IPCC-forecasted climates for 2050 and 2080. Th ough all currently recognized lineages and traditionally defi ned subspecies were predicted to lose increasing amounts of habitat as temperatures rose, the most-dramatic range losses were predicted to occur among traditional subspecies. Nineteen of the 31 traditional US pika subspecies were predicted to lose Ͼ 98% of their suitable habitat under a 7 ° C increase in the mean temperature of the warmest quarter of the year, and lineages were predicted to lose 88-95% of suitable habitat. Under a 4 ° C increase, traditional subspecies averaged a predicted 73% (range ϭ 44-99%) reduction. Th e appropriate-habitat fi lter removed 40 -6% of the predicted climatically suitable pixels, in a stepped and monotonically decreasing fashion as predicted temperatures rose. Predicted range collapse proceeded until only populations in island-biogeographic ' mainlands ' remained, which were not in the geographic range center. We used this model system to illustrate possible distributional shifts under stepped changes in biologically relevant aspects of climate, importance of land cover and taxonomic level in species-distribution forecasts, and impact of using a single threshold vs multiple categories of persistence probability in predicted range maps; we encourage additional research to further investigate the generality of these patterns.

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North American Pika (Ochotona princeps) as a Late Quaternary Biogeographic Indicator Species

Cited by 90 publications

References 17 publications

Molecular Systematics of Pikas (Genus Ochotona) Inferred from Mitochondrial DNA Sequences

Molecular Systematics of Pikas (Genus Ochotona) Inferred from Mitochondrial DNA Sequences

Predictors of Current and Longer-Term Patterns of Abundance of American Pikas (Ochotona princeps) across a Leading-Edge Protected Area

Not‐so‐splendid isolation: modeling climate‐mediated range collapse of a montane mammalOchotonaprinceps across numerous ecoregions

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