Modeling within-lineage evolution as a consequence of changes in the adaptive landscape across short and long timescales

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ID: 320447
2026
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Abstract
Abstract The adaptive landscape has been suggested as a potential conceptual bridge between phenotypic evolution on generational and macroevolutionary timescales. However, this potential remains largely untapped due to a limited understanding of how it changes through time. Here, we assessed the dynamics of the adaptive landscape across different time intervals by analyzing phenotypic time series using multivariate models of adaptation. First, we examined whether a decrease in river water flow affected the optimal body mass of a salmon population over a few decades. Second, we explored whether temperature changes affected the optimal size of coccoliths in a species of coccolithophore across about a hundred thousand years in the Cretaceous. Finally, we analyzed the extent to which temperature changes affected the optimal shell size in a lineage of planktic foraminifera over a few million years during the Miocene. We find evidence that evolution induced by changes in the adaptive landscape, driven by environmental change, occurred in the salmon and foraminifer datasets, but we do not detect a causal link between the investigated paleo‑proxies and size changes in the coccolithophore lineage. We argue that applying the same modeling framework to datasets covering different time spans not only offers a promising way to better connect evolutionary processes across timescales but also enables tests of adaptive hypotheses about within-lineage evolution.
Reference Key
openalex_W7167936802 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Marion Thaureau, Kjetil Lysne Voje
Journal international journal of systematic and evolutionary microbiology
Year 2026
DOI
10.1093/evolut/qpag127
URL
https://doi.org/10.1093/evolut/qpag127
Keywords Keywords not found

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