Preliminary paleolimnological study of rocha lagoon, SE Uruguay |
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| Authors: | Felipe Garcí a-Rodrí guez, Laura Del Puerto, Carola Casti eira, Hugo Inda, Roberto Bracco, Peter Spechmann,Burkhard Wilhelm Scharf |
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| Affiliation: | Felipe García-Rodríguez, Laura Del Puerto, Carola Castiñeira, Hugo Inda, Roberto Bracco, Peter Spechmann,Burkhard Wilhelm Scharf, |
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| Abstract: | Physical, chemical and biological data from a sedimentary profile of Rocha lagoon (Uruguay) are presented. Analyses of silica remains showed that opal phytoliths, diatoms, sponge spicules and chrysophyte cysts were the most important contributors to biogenic silica. Organic matter, total nitrogen and total phosphorus were used to infer past trophic development. Physical analysis of sediments allowed us to identify five lithological units related to sea level variation and climatic events. |
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| Keywords: | Paleolimnology coastal lagoon opal phytoliths diatoms sponge spicules chrysophyte cysts Uruguay |
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