The reduction in biodiversity after the end-Cretaceous mass extinction event did not instantaneously create evolutionary opportunities for planktonic protists. Survivors instead re-diversified in pulses that followed morphological innovations.
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Weil, A., Kirchner, J.W. Diversity on the rebound. Nat Ecol Evol 3, 873–874 (2019). https://doi.org/10.1038/s41559-019-0883-5
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DOI: https://doi.org/10.1038/s41559-019-0883-5
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