La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	The Great American Schism: Divergence of Marine Organisms After the Rise of the Central American Isthmus
Auteurs :	H. A. Lessios, Auteur
Type de document :	Article
Dans :	Annual Review of Ecology, Evolution, and Systematics (39 2008)
Article en page(s) :	63-91
Langues:	Anglais
Résumé :	After a 12-million-year (My) process, the Central American Isthmus was completed 2.8 My ago. Its emergence affected current flow, salinity, temperature, and primary productivity of the Pacific and the Atlantic and launched marine organisms of the two oceans into independent evolutionary trajectories. Those that did not go extinct have diverged. As no vicariant event is better dated than the isthmus, molecular divergence between species pairs oil its two coasts is of interest. A total of 38 regions of DNA have been sequenced in 9 clades of echinoids,

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