Behavioral Ecology of American Pikas (Ochotona princeps) at Mono Craters, California: Living on the Edge

Smith, Andrew T.; Nagy, John D.; Millar, Constance I.

doi:10.3398/064.076.0408

Cited by 16 publications

(43 citation statements)

References 78 publications

(156 reference statements)

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“…Often these sites were intermingled with and within the dispersal distance of extant sites; potentially some of these sites are transiently vacant patches that might be recolonized. In other situations, rapid surveys might have missed signs of occurrence (i.e., false absence), as has been noted before (Jeffress, Van Gunst, and Millar 2017;Millar, Westfall, and Delany 2013;Smith, Nagy, and Millar 2016). Further, we have found that detection was consistently much lower at lower elevation and/or marginal habitat, even where pikas were present and abundant, making the rapid-survey issue even more problematic (Smith, Nagy, and Millar 2016).…”

Section: Extant Pika Populations In the Great Basin And Comparison Wisupporting

confidence: 54%

“…In other timeseries studies of this region, however, population status does not correlate consistently with temperature or elevation (Millar et al 2014a;Smith and Nagy 2015;Stewart and Wright 2012). Surveys in parts of the western GB (Massing 2012;Millar and Westfall 2010;Millar, Westfall, and Delany 2013;Stewart et al 2015) documented the locally widespread presence of pikas, including sites at low and climatically marginal GB sites, which suggest thermal tolerance (Beever et al 2008;Collins and Bauman 2012;Jeffress, Van Gunst, and Millar 2017;Millar, Westfall, and Delany 2013;Smith, Nagy, and Millar 2016).…”

Section: Introductionmentioning

confidence: 83%

“…In other situations, rapid surveys might have missed signs of occurrence (i.e., false absence), as has been noted before (Jeffress, Van Gunst, and Millar 2017;Millar, Westfall, and Delany 2013;Smith, Nagy, and Millar 2016). Further, we have found that detection was consistently much lower at lower elevation and/or marginal habitat, even where pikas were present and abundant, making the rapid-survey issue even more problematic (Smith, Nagy, and Millar 2016). Finally, old sign has only recently been recorded as a survey variable, and there were differences in survey effort by subregions.…”

Section: Extant Pika Populations In the Great Basin And Comparison Wimentioning

confidence: 90%

“…Where extreme high values would seem to be unfavorable given the thermal physiology of pikas (as in sites with warm summers or cold, dry winters), we suspect that thermal conditions are mitigated by microclimates associated with talus landforms. Rocky landforms have thermal regimes shown to be decoupled from surface air, which results in cooler temperatures with low variance during warm summer days and warmer temperatures under snow in cold winters (Hall et al 2016;Delany 2014b, 2016;Otto, Wilson, and Beever 2015;Rodhouse, Hovland, and Jeffress 2017;Smith, Nagy, and Millar 2016;Wilkening, Ray, and Varner 2015). These landforms also support vegetation in their forefields on which pikas depend for summer forage and winter caching (Millar et al 2015).…”

Section: Extant Pika Populations In the Great Basin And Comparison Wimentioning

confidence: 99%

“…In addition, studies based on surveys of modern (nonhistoric) sites have focused on limited portions of the GB pika range. Finally, some monitoring efforts used rapid-assessment surveys, which have an increased likelihood for introducing error in population status compared with traditional methods that are more time consuming (Smith, Nagy, and Millar 2016). Taken together, a widely held assumption in scientific and public understanding is that pikas have become rare (especially in the GB), pikas are limited to a few high and cool elevations, a significant portion of GB pika sites have become extirpated, and that the species is at risk of extinction.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Distribution, climatic relationships, and status of American pikas (Ochotona princeps) in the Great Basin, USA

Millar

Delany

Hersey

et al. 2018

Arctic, Antarctic, and Alpine Research

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To advance understanding of the distribution, climatic relationships, and status of American pikas (Ochotona princeps) in the Great Basin, United States, we compiled 2,387 records of extant pika sites surveyed since 2005, 89 records of documented extirpated sites (resurvey of historic sites), and 774 records of sites with old sign only. Extant sites extended across five degrees latitude and ten degrees longitude, encompassed six subregions, traversed forty mountain ranges, spanned 2,378 m in elevation (1,631-4,009 m), and comprised three of five currently described pika subspecies. A climate envelope for extant sites using the PRISM climate model expands the range of temperature and precipitation values that have been previously described. Extirpated and old-sign sites were mostly found within the geographic and climatic space of extant sites, but often in warmer and drier portions. Considerable overlap of extirpated, old, and extant groups within the same climate space suggests that nonclimatic factors have also contributed to population losses. The broad distribution and enlarged climate envelope of extant pika sites indicate that despite some localized extirpations, pika populations are persisting across Great Basin mountains, and appear to be able to tolerate a broader set of habitat conditions than previously understood.

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Section: Extant Pika Populations In the Great Basin And Comparison Wisupporting

confidence: 54%

Section: Introductionmentioning

confidence: 83%

Section: Extant Pika Populations In the Great Basin And Comparison Wimentioning

confidence: 90%

Section: Extant Pika Populations In the Great Basin And Comparison Wimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Distribution, climatic relationships, and status of American pikas (Ochotona princeps) in the Great Basin, USA

Millar

Delany

Hersey

et al. 2018

Arctic, Antarctic, and Alpine Research

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Return of the pika: American pikas re‐occupy long‐extirpated, warm locations

Millar

Smith

2022

Ecology and Evolution

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American pikas (Ochotona princeps), small mammals related to rabbits, occur in mountainous regions of western North America, where they live in shattered‐rock habitats (talus). Aspects of their physiology and life history create situations that appear to put pikas at risk from warming climates. Some low‐elevation, warm sites that historically harbored pikas have become extirpated, and the assumption is that these will not be re‐colonized under current climate trends. Unexpectedly, in 2021, we found that pikas had re‐colonized two very warm, low‐elevation, dry sites in eastern California, USA, in the Bodie Mountains and Mono Craters. Resident pikas appear to have been absent at both sites for ≥10 years. These findings suggest that pikas, which are normally diurnally active, are able to overcome thermal dispersal barriers and re‐colonize long‐extirpated sites, perhaps by moving during cool nights. Our data also highlight the often unrecognized suitability of pika habitat in warm regions where the interiors of taluses can remain stably cool even when external air temperatures are hot.

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Collecting, Documenting, and Archiving Bioacoustical Data and Metadata

Gannon

Dunlop²,

Hawkins³

et al. 2022

Exploring Animal Behavior Through Sound: Volume 1

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The best practices for conducting bioacoustical research are described in this chapter. Ethical considerations, including the need for research integrity, animal ethics (e.g., in the USA, the Institutional Animal Care and Use Committee, IACUC) approvals, and data management and archiving are discussed. Suggestions for conducting a bioacoustical study in the laboratory, field, and captivity are described, including designing a data sheet. Recommendations for carrying out playback studies, a special type of bioacoustical study, are also provided. Finally, the importance of historical data, properly logging the details of a recording, documenting equipment specifications, and correctly storing analog and digital acoustic data are summarized.

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Behavioral Ecology of American Pikas (Ochotona princeps) at Mono Craters, California: Living on the Edge

Cited by 16 publications

References 78 publications

Distribution, climatic relationships, and status of American pikas (Ochotona princeps) in the Great Basin, USA

Distribution, climatic relationships, and status of American pikas (Ochotona princeps) in the Great Basin, USA

Return of the pika: American pikas re‐occupy long‐extirpated, warm locations

Collecting, Documenting, and Archiving Bioacoustical Data and Metadata

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