River connectivity and climate behind the long-term evolution of tropical American floodplain lakes.

ABSTRACT: This study presents the long-term evolution of two floodplains lakes (San Juana and Barbacoas) of the Magdalena River in Colombia with varying degree of connectivity to the River and with different responses to climate events (i.e., extreme floods and droughts). Historical limnological changes were identified through a multiproxy-based reconstruction including diatoms, sedimentation, and sediment geochemistry, while historical climatic changes were derived from the application of the Standardised Precipitation-Evapotranspiration Index. The main gradients in climatic and limnological change were assessed via multivariate analysis and generalized additive models. The reconstruction of the more isolated San Juana Lake spanned the last c. 500 years. Between c. 1,620 and 1,750 CE, riverine-floo

SUBMITTER: Lopera-Congote L 

PROVIDER: S-EPMC8495813 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature