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Alpine marmots face declining juvenile survival due to climate change impacting hibernation and social behaviors. Colder winters and reduced snowpack negatively affect young marmots, hindering their ability to survive and potentially threatening population resilience.

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Area of Science:

  • Ecology and evolutionary biology
  • Climate change biology
  • Mammalian ecology

Background:

  • Understanding climate change impacts on species' life histories is crucial.
  • Species-specific lifestyles, like hibernation and sociality, can mediate climate change responses.
  • The influence of lifestyle on climate change adaptation remains understudied.

Purpose of the Study:

  • To investigate how Alpine marmot lifestyle (hibernation, sociality) interacts with climate change.
  • To analyze temporal variation in age-specific survival in Alpine marmots over 23 years.
  • To determine the effects of changing weather variables on Alpine marmot population dynamics.

Main Methods:

  • Conducted a 23-year longitudinal study on Alpine marmots.
  • Analyzed age-specific survival rates in relation to weather variables and social structure.
  • Examined the influence of hibernation and sociality on population responses to climate change.

Main Results:

  • Alpine marmots showed decreased juvenile survival over the study period.
  • Colder winters with thinner snow cover negatively impacted juvenile survival.
  • Reduced juvenile survival led to fewer helpers, decreasing subsequent over-winter survival for young marmots.

Conclusions:

  • Life-history traits associated with hibernation and sociality in Alpine marmots exacerbate negative climate change impacts.
  • Decreased juvenile survival may impede Alpine marmots' ability to adapt to ongoing climate change.
  • Conservation strategies may need to consider the interplay between lifestyle, climate, and survival in social hibernators.