Show simple item record

dc.contributor.author Cusminsky, Gabriela
dc.contributor.author Schwalb, Antje
dc.contributor.author Perez, Alejandra P.
dc.contributor.author Pineda, Daniela
dc.contributor.author Viehberg, Finn
dc.contributor.author Whatley, Robin C.
dc.contributor.author Markgraf, Vera
dc.contributor.author Gilli, Andrea
dc.contributor.author Ariztegui, Daniel
dc.contributor.author Anselmetti, Flavio S.
dc.date.accessioned 2011-07-05T10:55:39Z
dc.date.available 2011-07-05T10:55:39Z
dc.date.issued 2011-07-05
dc.identifier.citation Cusminsky , G , Schwalb , A , Perez , A P , Pineda , D , Viehberg , F , Whatley , R C , Markgraf , V , Gilli , A , Ariztegui , D & Anselmetti , F S 2011 , ' Late quaternary environmental changes in Patagonia as inferred from lacustrine fossil and extant ostracods ' Biological Journal of the Linnean Society , vol 103 , pp. 397-408 . en
dc.identifier.issn 1095-8312
dc.identifier.other PURE: 169005
dc.identifier.other dspace: 2160/7135
dc.identifier.uri http://hdl.handle.net/2160/7135
dc.description Cusminsky, G., Schwalb, A., Perez, A. P., Pineda, D., Viehberg, F., Whatley, R., Markgraf, V., Gilli, A., Ariztegui, D., Anselmetti, F. S. (2011). Late quaternary environmental changes in Patagonia as inferred from lacustrine fossil and extant ostracods. Biological Journal of the Linnean Society, 103(2), 397-408. en
dc.description.abstract In the present study, we compare modern and Quaternary ostracods from two lacustrine basins: Laguna Cari-Laufquen (41 degrees S) and Lago Cardiel (49 degrees S) in Patagonia. Taxonomic and quantitative analyses along with isotopic and chemical studies of the extant ostracod fauna indicate that distinct ostracod associations can be identified as a function of conductivity. Three ostracod associations can be distinguished: (1) springs, ponds and small creeks, characterized by low conductivity (e. g. 1015 ms cm(-1)); (2) lakes and permanent ponds, characterized by medium conductivity (e. g. 1625 ms cm(-1)) and (3) ephemeral lacustrine environments, generally characterized by higher conductivity (e. g. 16 480 ms cm(-1)) These modern ostracod associations were also identified in older sequences from sediments outcropping in the Laguna Cari-Laufquen current shoreline, as well as in sediment cores from Lago Cardiel. The predominance of Limnocythere rionegroensis Cusminsky & Whatley in the Cari-Laufquen sections suggests the development of a saline and turbid lake during the Late Pleistocene and Early Holocene, and thus higher precipitation at these latitudes. Changes in ostracod abundance and associations have been observed in Lago Cardiel during the last approximately 16 000 calibrated years BP. Conductivity is known to change as a function of the ratio of precipitation to evaporation and a decrease in conductivity from the Late Pleistocene to the Middle Holocene suggests substantial hydrological variations (i. e. increase of the precipitation/ evaporation ratio suggests minor conductivity). These two examples show that ostracods provide an excellent proxy for interpreting palaeoclimatic and palaeoenvironmental changes in Patagonia. (C) 2011 The Linnean Society of London, Biological Journal of the Linnean Society, 2011, 103, 397-408. en
dc.format.extent 12 en
dc.language.iso eng
dc.relation.ispartof Biological Journal of the Linnean Society en
dc.subject autoecology en
dc.subject non-marine ostracods en
dc.subject ostracods en
dc.subject Pleistocene to Recent sequences en
dc.subject Southern south America en
dc.title Late quaternary environmental changes in Patagonia as inferred from lacustrine fossil and extant ostracods en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Other IGES Research en
dc.description.status Peer reviewed en


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Cadair


Advanced Search

Browse

Statistics