Index Geophysics

Dynamics of community structure of macromammals in the late Cenozoic of North America: Rapid Turnover Fauna Episodes (RTE) under the concept of Chronofauna

During the late Cenozoic the highest generic richness tended towards the loss of diversity, although three peaks were recognized with high rates of first records followed a high percentage of extinctions known as Rapid Turnover Fauna Episodes (RTE) (early Hemphillian, late Blancan and late Irvigntonian). However, these events define a pattern that fits the concept of Chronofauna of Olson (1952). The RTE episodes are considered in this structure as transition events between a Chonofauna and another. While the period of relative stability is equivalent to the Chronofauna, in which new ecomorphs are taking a dominant role, persisting around a series of intervals, is not the case in their taxonomic composition, which is altered by small events of low intensity extinctions.
Under this pattern, we can deduce that in the last 9 million years, four different Chronofaunas can be recognized: Clarendoniano chronofauna (later section), Blancan chronofauna, Irvingtonian chronofauna and Holocene chronofauna (initial section).

R. E. Hernández Jasso

Dinámica de la estructura de comunidades

Cronofauna

Recambio rápido de fauna

Norteamérica

Cenozoico tardío

Geology

QE1-996.5

Consejo Superior de Investigaciones Científicas

2017-06-01T00:00:00Z

article

0367-0449

1988-3250

10.3989/egeol.42668.434

https://doaj.org/article/fa44868e47a8435a84c1bed4c3bbd13d

Estudios Geologicos, Vol 73, Iss 1, Pp e063-e063 (2017)

EN

ES

FR

http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/view/956

https://doaj.org/toc/0367-0449

https://doaj.org/toc/1988-3250

Journal Licence: CC BY