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May 14, 2026The Journal of the Acoustical Society of America

Climate change and shifting bearded seal ( Erignathus barbatus ) breeding phenology in the Alaskan Arctic

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Authors

RLRachel LewisMFMichelle FournetADAndrew Von Duyke

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Overview

Randomized trial analyzes changes in bearded seal chorusing timing, implying shifts in Arctic ecosystems due to climate change.

Key Points

  • This study aims to examine how climate change impacts the breeding phenology of bearded seals in the Alaskan Arctic.
  • Analyzed passive acoustic data from 2010–2012 and 2024.
  • Assessed changes in chorus onset in relation to spring sea ice breakup.
  • Calculated vocalization presence in loudest sound periods (top 10th percentile) across years.
  • Chorus onset shifted to March 20 in 2024, compared to April 29, April 27, and May 11 in 2010, 2011, and 2012, respectively.
  • Bearded seal vocalizations were present in 40% of analyzed sound bins each year.
  • Findings suggest earlier chorusing may increase acoustic competition among seals.

Cite This Study

Lewis et al. (2025) studied this question.

synapsesocial.com/papers/6a0567fda550a87e60a20442https://doi.org/10.1121/10.0040035
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