Molecular zoogeography of Antarctic euphausiids and notothenioids: from species phylogenies to intraspecific patterns of genetic variation

Published and unpublished data are used to investigate possible mechanisms of species diversification in two key groups of Antarctic organisms: the Notothenioidei and the Euphausiidae. Species distributions are mapped onto molecular phylogenies, and this evidence is interpreted in light of the vario...

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Bibliographic Details
Published in:Antarctic Science
Main Authors: Bargelloni, Luca, Zane, Lorenzo, Derome, Nicolas, Lecointre, Guillaume, Patarnello, Tomaso
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2000
Subjects:
Geology
Ecology, Evolution, Behavior and Systematics
Oceanography
Antarctic
Southern Ocean
Antarc*
Antarctic Science
Online Access:http://dx.doi.org/10.1017/s0954102000000328
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102000000328
Description
Summary:Published and unpublished data are used to investigate possible mechanisms of species diversification in two key groups of Antarctic organisms: the Notothenioidei and the Euphausiidae. Species distributions are mapped onto molecular phylogenies, and this evidence is interpreted in light of the various ecological and historical factors which characterize the Southern Ocean. The joint effect of diverse agents (vicariance, “jump” dispersal) appears to be determinant in several cases for species divergence. A review of results from population genetics studies, together with new molecular evidence, confirm the importance of physical barriers (oceanographic fronts) in reducing migration, thereby promoting speciation, at least in notothenioids.

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