The ecological importance of natural dark nights for circadian organization, metabolism and reproduction in birds

Apr 26, 2026BMC ecology and evolution

Natural dark nights support daily rhythms, metabolism, and reproduction in birds

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Abstract

Natural darkness plays a critical role in regulating metabolism and reproduction in vertebrates.

  • The length of the daily light period is key to physiological ecology across vertebrate species.
  • Disruption of light-dark cycles, especially darkness at night, can disturb circadian rhythms.
  • Changes in circadian organization may have significant effects on metabolism and reproduction.
  • Metabolism is suggested to act as a gatekeeper for reproductive processes in diurnal vertebrates.
  • Preserving natural darkness is important for maintaining the energy balance and population viability of species in urban environments.

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