Which freshwater ecosystem is characterized by stagnant water?

Lakes are freshwater ecosystems that are typically characterized by stagnant water. Unlike rivers, creeks, and streams, which are flowing bodies of water that move continuously in one direction, lakes are often still and accumulate water within a basin. This stagnant condition allows for stratification, where different layers of water can exist at various temperatures and oxygen levels, which can significantly influence the types of organisms that thrive there. Lakes can vary greatly in size and depth, and they often support a diverse array of life, including fish, plants, and microorganisms adapted to the stillness of their habitats.