Which of the following is NOT an example of a lentic ecosystem?

A lentic ecosystem is characterized by still or standing water bodies, such as ponds and lakes, where water is not in constant motion. Ponds and lakes are prime examples of lentic environments due to their relatively calm water, which allows for the formation of diverse habitats and ecosystems. Wetlands, while they may have slow-moving water, also fit into the lentic category because they maintain standing water for significant portions of the year, supporting various plant and animal life.

In contrast, rivers are flowing water ecosystems, characterized by moving water that shapes their physical and ecological properties. The constant current in rivers creates unique conditions that are fundamentally different from those found in lentic systems. This distinction is critical for understanding the characteristics and ecological dynamics of these aquatic systems, as the flowing nature of rivers supports different species and community structures than those found in still water environments.