Read e-book online Biogeography of the Quaternary Molluscs of the Southwestern PDF

By Sergio Martínez,Claudia J. del Río,Alejandra Rojas

The Quaternary includes a quick time within the Earth’s heritage, and except a couple of exceptions, molluscan assemblages recovered from exposures alongside the coast of Southwestern South the USA (Southern Brazil, Uruguay, Argentina) are primarily an analogous than those who inhabit the zone this present day, resulting in the belief that no very important swap within the distribution of the faunas seeing that Pleistocene occasions has happened. notwithstanding, the great taxonomic and temporal solution reached within the final years, allowed us to discover a few biogeographic adjustments, even though conventional biogeographic devices stay an identical (i.e. Magellanic and Argentinean Provinces). those variations contain in most cases adaptations within the taxonomic composition of the assemblages and within the southern barriers of a few species distributions (extralimital species), this day retracted northwards. those adjustments are with regards to southward shifts of the nice and cozy waters of the Brazilian present, correlated with worldwide hot peaks. This phenomenon was once extra severe within the past due Pleistocene (MIS 5e) and within the Holocene among ca. 6500-3500 14C yr.

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Biogeography of the Quaternary Molluscs of the Southwestern Atlantic Ocean (SpringerBriefs in Earth System Sciences) by Sergio Martínez,Claudia J. del Río,Alejandra Rojas

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