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Related Experiment Video

Updated: Jun 14, 2026

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions
07:54

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

Published on: March 9, 2021

Testing alternative models of climate-mediated extirpations.

Erik A Beever1, Chris Ray, Philip W Mote

  • 1U.S. Geological Survey, Alaska Science Center, Anchorage, Alaska 99508-4650, USA. ebeever@usgs.gov

Ecological Applications : a Publication of the Ecological Society of America
|March 31, 2010
PubMed
Summary

Climate change impacts pika populations, with chronic heat and acute cold stress emerging as key predictors of persistence. Understanding these thermal stresses is crucial for conservation efforts and predicting distributional shifts.

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Area of Science:

  • Ecology
  • Climate Change Biology
  • Zoology

Background:

  • Biotic responses to climate change vary, with uncertainty regarding whether populations facing the greatest change or those at the edge of their bioclimatic envelope experience the most losses.
  • Previous research on American pikas (Ochotona princeps) indicated climate, biogeography, and anthropogenic factors influenced 20th-century population extirpations.
  • Subsequent surveys revealed continued extirpations and shifts in pika distribution, prompting further investigation into thermal stress effects.

Purpose of the Study:

  • To evaluate alternative hypotheses on the effects of thermal stress on American pika populations.
  • To determine whether acute cold stress, acute heat stress, or chronic heat stress best predicts pika persistence.
  • To assess the influence of climate change on pika distribution patterns.

Main Methods:

  • Deployed temperature sensors across 156 pika habitat locations in the Great Basin.
  • Related sensor data to Historical Climate Network weather station data to hindcast habitat temperatures from 1945-2006.
  • Defined climate change as shifts in thermal metrics between 1945-1975 and 1976-2006.

Main Results:

  • Pika persistence patterns were significantly predicted by climate metrics.
  • Chronic heat stress and acute cold stress, previously unrecognized stressors, were strong predictors of pika persistence.
  • Climate change effects were suggested, but recent and long-term chronic heat and acute cold stress metrics were more influential.

Conclusions:

  • Distributional shifts in American pikas can be rapid and are strongly influenced by climatic factors.
  • Chronic heat and acute cold stress are critical factors affecting pika persistence, beyond acute heat stress.
  • Findings have significant implications for conservation strategies, including reintroductions and developing early-warning indicators for climate change impacts.