Preliminary Paleolimnological Study of Rocha Lagoon, SE Uruguay.

GARCÍA–RODRÍGUEZ, F., DEL PUERTO, L. CASTIÑEIRA, C., INDA, H., BRACCO, R. SPRECHMANN, P. Y W. S. BURKHARD

LIMNOLOGICA

Año: 2001 p. 221 - 228

0075-9511

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.