Download Biogeography of the Quaternary Molluscs of the Southwestern by Sergio Martínez, Claudia J. del Río, Alejandra Rojas PDF

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

ISBN-10: 940076054X

ISBN-13: 9789400760547

The Quaternary contains a short time within the Earth’s heritage, and except a number of exceptions, molluscan assemblages recovered from exposures alongside the coast of Southwestern South the USA (Southern Brazil, Uruguay, Argentina) are basically an analogous than those who inhabit the quarter at the present time, resulting in the idea that no vital swap within the distribution of the faunas considering the fact that Pleistocene occasions has happened. notwithstanding, the great taxonomic and temporal solution reached within the final years, allowed us to notice a few biogeographic adjustments, even if conventional biogeographic devices stay a similar (i.e. Magellanic and Argentinean Provinces). those differences contain almost always diversifications within the taxonomic composition of the assemblages and within the southern obstacles of a few species distributions (extralimital species), at the present time retracted northwards. those adjustments are regarding 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 overdue Pleistocene (MIS 5e) and within the Holocene among ca. 6500-3500 14C 12 months.

Show description

Read or Download Biogeography of the Quaternary Molluscs of the Southwestern Atlantic Ocean PDF

Similar paleontology books

Fossil Legends of the First Americans

This paintings exceeds expectation created via Mayor's prior excavation, "The First Fossil Hunters", which digs out the cast continues to be of myths of the Classical historic global. The examine would possibly not qualify as 'exhaustive'; yet, it really is definitely huge, with shovels-full of formerly unpublished local American lore.

American Monster: How the Nation's First Prehistoric Creature Became a Symbol of National Identity

In 1801, the 1st entire mastodon skeleton was once excavated within the Hudson River Valley, marking the climax of a century-long debate in the US and Europe over the identification of a mysterious creature often called the yankee Incognitum. lengthy sooner than the dinosaurs have been stumbled on and the suggestion of geological time obtained foreign money, many voters of the hot republic believed this legendary beast to be a ferocious carnivore, able to crushing deer and elk in its ''monstrous grinders.

Adventures in Paleontology: 36 Classroom Fossil Activities (PB201X)

Thousands of years after vanishing from the Earth, dinosaurs nonetheless have the ability to stir scholars' interest. Deepen that curiosity with Adventures in Paleontology, a chain of energetic hands-on actions particularly for center schoolers. This superbly illustrated complete colour publication positive aspects 36 actions that open scholars as much as numerous foundational sciences, together with biology, geology, chemistry, physics, and astronomy.

Additional resources for Biogeography of the Quaternary Molluscs of the Southwestern Atlantic Ocean

Sample text

Htm Huang X-L, Qiao G-X, Lei F-M (2010) Use of parsimony analysis to identify areas of endemism of Chinese birds: implications for conservation and biogeography. Int J Mol Sci 11:2097– 2108. 3390/ijms11052097 Isla FI, Rutter NW, Schnack EJ, Zarate MA (2000) La transgresión Belgranense en Buenos Aires. Una revisión a cien años de su definición. Rev Cuat Cienc Amb 1:3–14 Kreft H, Jetz W (2010) A framework for delineating biogeographical regions based on species distributions. J Biogeogr 7:2029–2053.

According to the present geographical ranges of the studied species, temperatures were warmer during the Quaternary than during Recent times, but no significant temperature differences are recorded between the Pleistocene and Holocene assemblages. More fine-tuning works are needed to elucidate whether the paleoclimatic information provided by molluskan faunas reflects the same results that could be reached through the studies of other taxonomic groups or using different methodologies. There is an important verification: the areas located in the extremes of the geographical distribution of species have not extralimital species.

Although there are some methodological problems for testing this latitudinal richness variation during the Quaternary of the Southwestern Atlantic region, the multivariate analyses carried out show a latitudinal control both for the Pleistocene and Holocene assemblages, grouping the areas according to their geographical location. Richness and taxonomic diversity do not fully confirm this pattern in the region during Quaternary times and, even when Tierra del Fuego shows the lowest richness, it must be kept in mind that this southern region of the Southwestern Atlantic is one of the less studied, and that future findings could substantially increase the number of recorded taxa.

Download PDF sample

Biogeography of the Quaternary Molluscs of the Southwestern Atlantic Ocean by Sergio Martínez, Claudia J. del Río, Alejandra Rojas


by John
4.1

Rated 4.45 of 5 – based on 32 votes