lake life cycle

A lake's life cycle, or extinction, can occur over days or geological time. Lakes physically disappear through water loss or sedimentation, or chemically/biologically through eutrophication. Initially, lakes are oligotrophic with little organic material and ample oxygen. As nutrients increase from erosion and organic matter, they become eutrophic, leading to oxygen depletion. This process, known as ecological succession, can eventually transform a lake into a marsh and then a pond, ultimately disappearing.12

Human activities, such as pollution from sewage and fertilizers, can accelerate eutrophication, leading to excessive algal blooms and degraded water quality. Sediments, including clastic material, organic debris, and chemical precipitates, accumulate on the lake bottom, gradually filling the basin. Paleolimnology, the study of past lakes through sediment cores, helps reconstruct lake history and environmental changes.342