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Variable Environments Can Boost or Block Adaptation, Large-Scale Evolution Study Finds

Researchers tested thousands of generations of digital organisms across 105 shifting settings to reveal context-dependent paths to higher fitness.

Overview

  • The peer-reviewed analysis, published December 15 in PNAS by University of Vermont and University of Cambridge collaborators, reports divergent outcomes under environmental variability.
  • By contrasting many fluctuating regimes with static ones, the team shows some patterns open routes to higher fitness whereas others trap populations on lower peaks.
  • The authors warn that conclusions from single populations in a single setting can misrepresent a species’ capacity to adapt.
  • Initial conditions and evolutionary history strongly constrained trajectories, indicating that one population cannot stand in for a species.
  • The findings inform questions on climate adaptation and antibiotic resistance and align with AI challenges in continual learning and meta-learning, with lead authors set to continue the work in Tübingen.