Population Dynamics and Climate Adaptations in Hibernating Rodents

Hibernating rodents occupy diverse habitats across temperate and polar regions, where seasonal extremes in temperature and resource availability drive their population dynamics. These species employ profound metabolic suppression and torpor cycles to conserve energy, with emergence and immergence timed to local climatic cues. Variation in hibernation phenology influences survival, reproductive timing and cohort recruitment, leading to sex‐ and age‐specific strategies that maximise lifetime fitness. Climate warming and altered precipitation patterns are increasingly shifting the balance between energy reserves and foraging opportunities. Changes in snow cover, temperature regimes and seasonal rainfall can advance or delay hibernation onset, modify interbout arousal frequencies and alter litter size. Such shifts feed back to affect population density, age structure and spatial distribution. Integrating physiological insights with long-term demographic data reveals how hibernators buffer against environmental stochasticity, but also highlights vulnerability where rapid climate change outpaces adaptive capacity. Understanding these dynamics is critical for predicting range shifts, informing conservation management and anticipating ecosystem-level consequences of changing hibernator populations.

Research from Nature Portfolio

Recent work has demonstrated that hibernation timing functions not only as an energy-saving mechanism but also as a life-history trait that varies with age and reproductive state. Ageing individuals delay hibernation entry when breeding effort increases, and older rodents emerge earlier in spring to maximise reproductive opportunities despite elevated predation risk during active periods. This flexibility underscores the adaptive trade-off between survival and current reproduction, revealing that dormancy duration itself is subject to selection pressures linked to longevity and fitness.

Population Dynamics and Climate Adaptations in Hibernating Rodents publication trend

The graph below shows the total number of articles in population dynamics and climate adaptations in hibernating rodents across all publications each year (not limited to Nature Index journals).

Technical terms

Hibernation phenology: Timing of entry into and emergence from seasonal torpor states.

Interbout arousal: Periodic spontaneous return to normothermy during hibernation.

Phenotypic plasticity: Capacity of an organism to adjust its physiology or behaviour in response to environmental variation.

Life-history traits: Characteristics such as growth rate, age at first reproduction and litter size that influence an organism’s life-cycle strategy.

Population dynamics: Patterns of change in population size, composition and distribution over time under ecological and environmental pressures.

References

1. Effects of climate change on life‐history traits in hibernating mammals. Mammal Review (2023).
2. Life history consequences of climate change in hibernating mammals: a review. Ecography (2022).
3. Effects of aging on timing of hibernation and reproduction. Scientific Reports (2018).