Abundance not linked to survival across the end-Cretaceous mass extinction: Patterns in North American bivalves
AUTOR(ES)
Lockwood, Rowan
FONTE
The National Academy of Sciences
RESUMO
Ecological studies suggest that rare taxa are more likely to go extinct than abundant ones, but the influence of abundance on survivorship in the fossil record has received little attention. An analysis of Late Maastrichtian bivalve subgenera from the North American Coastal Plain found no evidence that survivorship is tied to abundance across the end-Cretaceous mass extinction (65 million years ago), regardless of abundance metric or spatial scale examined. The fact that abundance does not promote survivorship in end-Cretaceous bivalves suggests that the factors influencing survivorship during mass extinctions in the fossil record may differ from those operating during intervals of background extinction.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=151366Documentos Relacionados
- The last dinosaurs of Brazil: The Bauru Group and its implications for the end-Cretaceous mass extinction
- Avian evolution, Gondwana biogeography and the Cretaceous-Tertiary mass extinction event.
- Meteorite impact and the mass extinction of species at the Cretaceous/Tertiary boundary
- The tempo of mass extinction and recovery: The end-Permian example
- Gene flow across linguistic boundaries in Native North American populations