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Extinction debt is also known by the terms dead clade walking and survival without recovery when referring to the species affected.
Scientists found more than half of the groups of ancient sea-dwelling invertebrates they examined in the fossil record qualify as "dead-clades walking," or groups that survive an extinction event but never fully recover their previous diversity, shedding new light on extinction events.
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Apr 7, 2021 · “Dead clade walking” refers to fossil groups that suffer major drops in their biodiversity at a mass extinction but do not completely disappear from the fossil record. Why these groups were able to survive but not rediversify remains a relative mystery.
Apr 20, 2021 · Dead clades walking are animal groups that survive an extinction event but never fully recover. A study of 134 orders of ancient sea-dwelling invertebrates found that DCW are more common and long-lasting than expected, challenging the view of extinction as a sudden disappearance.
Apr 4, 2021 · Here we examine a special pattern of selectivity and recovery known as “dead clades walking” (DCWs) (7, 8) wherein certain clades survive through a ME event but never rediversify and maintain lowered levels of taxonomic richness until finally becoming extinct.
- B. Davis Barnes, Judith A. Sclafani, Judith A. Sclafani, Andrew Zaffos
- 10.1073/pnas.2019208118
- 2021
- 2021/04/04
Using a wealth of new fossil record data made available over the last two decades, the study found DCW are also common around smaller, more localized background extinction stages, the scientists...
"Dead clade walking" refers to fossil groups that suffer major drops in their biodiversity at a mass extinction but do not completely disappear from the fossil record. Why these groups were able to survive but not rediversify remains a relative mystery.
