2025-02-26 ロードアイランド大学(URI)
<関連情報>
- https://www.uri.edu/news/2025/02/when-the-wild-things-are-uri-team-reports-on-mammalian-daily-activity-with-surprising-results/
- https://www.science.org/doi/10.1126/sciadv.ado3843
野生動物が 哺乳類の昼夜活動性と可塑性の定義 When the wild things are: Defining mammalian diel activity and plasticity
Kadambari Devarajan, Mason Fidino, Zach J. Farris, Solny A. Adalsteinsson, […], and Brian D. Gerber
Science Advances Published:26 Feb 2025
Abstract
Circadian rhythms are a mechanism by which species adapt to environmental variability and fundamental to understanding species behavior. However, we lack data and a standardized framework to accurately assess and compare temporal activity for species during rapid ecological change. Through a global network representing 38 countries, we leveraged 8.9 million mammalian observations to create a library of 14,587 standardized diel activity estimates for 445 species. We found that less than half the species’ estimates were in agreement with diel classifications from the reference literature and that species commonly used more than one diel classification. Species diel activity was highly plastic when exposed to anthropogenic change. Furthermore, body size and distributional extent were strongly associated with whether a species is diurnal or nocturnal. Our findings provide essential knowledge of species behavior in an era of rapid global change and suggest the need for a new, quantitative framework that defines diel activity logically and consistently while capturing species plasticity.
