Moluscos recientes del Canal Beagle, Tierra del Fuego: unanálisis cualitativo y cuantitativo de los ensambles de valvas fósiles y actuales.

GORDILLO, S., BAYER, M.S., MARTINELLI, J.

Anales del Instituto de la Patagonia

Universidad de Magallanes

Lugar: Punta Arenas; Año: 2010 vol. 38 p. 95 - 106

0718-6932

In the Isla Grande of Tierra del Fuego, the marine Holocene (ca. 8.000 years BP) is represented bylittoral deposits, mostly up to 10 m a.s.l. raised marine terraces, extending along the modern coast, andcharacterized by the presence of mollusk shells, mainly bivalves and gastropods. In this work, which isfocused on Holocene mollusk assemblages from the Beagle channel, a qualitative and quantitative analysisof both fossil and modern shell assemblages, respectively collected from raised marine deposits andtheir adjacent beaches, was performed. For each assemblage, species richness, abundance and varioustaphonomic attributes were analyzed. The results indicate that the differences between assemblages do notcorrelate with climate changes that occurred during the Mid-Late Holocene, but reflect local differencesamong the sites taking into account the habitat heterogeneity in the Beagle channel.