A 700-year multiproxy reconstruction on the Argentinian Pampas inferred from the sediments of Laguna Blanca Grande

The Pampean region is a crucial area to obtain sensitive paleoclimatic lacustrine archives due the presence of shallow environments in territory non impacted by humans until last centuries. In this study, we provide paleoecological reconstruction for ca. 700 years based on multiproxy record from Laguna Blanca Grande, Olavarría (Buenos Aires, Argentina). Our inferences, which were sedimentary properties, diatom, cladoceran and ostracod assemblages, offered interesting information about hydroclimatic variability nutrient increase. Changes relative abundances diatoms, specifically Aulacoseira granulata var. angustissima fragilariods, used infer shifts conditions. remainder proxies together indicated small lake level changes. Reconstructed conditions Grande are consistent with previous inferences indicating humid phase around AD 1450 progressive drier 1530–1900. A flood gate construction an increase nutrients revealed higher human pressure population land-use changes during century. Further studies taxonomy autecology microcrustaceans needed effectively unlock contained biological Sudamerican records.