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April 15, 2026Proceedings of the National Academy of SciencesOpen Access

Habitat-specific temporal variation in the pace of fish diversification

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Authors

NPNick PeoplesMMMichalis MihalitsisPWPeter C. Wainwright

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Overview

This analysis reveals how habitat differences influence fish diversification rates over time, suggesting significant ecological implications.

Key Points

  • To investigate how biotic and abiotic factors across different aquatic habitats influence the diversification rates of ray-finned fishes over geological timescales.
  • Analyzed phylogeny-wide net diversification rates across different fish lineages.
  • Compared diversification rates in complex habitats like reefs and freshwater environments with simpler pelagic zones.
  • Utilized multiple diversification models to assess habitat impact on species evolution.
  • Diversification rates in reef-associated and freshwater fish lineages increased by 1.5 to 1.7 times.
  • Rates remained stable in less complex habitats such as the pelagic zone.
  • Evidence linked increased diversification to benthic-feeding innovations and resources dynamics after the Paleocene–Eocene Thermal Maximum.

Cite This Study

Peoples et al. (2026) studied this question.

synapsesocial.com/papers/69df2b49e4eeef8a2a6b0353https://doi.org/10.1073/pnas.2533611123
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