Which term refers to flowing water ecosystems like rivers and streams?

Which term refers to flowing water ecosystems like rivers and streams?

• A. Lentic Systems
• B. Lotic Systems
• C. Riverine Habitats
• D. Aquatic Systems

Answer: (B)

Flowing-water habitats are defined by the movement of water downstream, which creates a continuous current and unique physical conditions. Lotic systems capture this idea perfectly, covering rivers and streams where water flow shapes the environment, oxygen dynamics, sediment transport, and the organisms adapted to living in currents. This contrasts with still-water environments, where water isn’t moving—these are called lentic systems. The term “riverine habitats” is descriptive of streams and rivers but isn’t the standard category for the whole flowing-water concept, and “aquatic systems” is too broad, since it includes both flowing and still waters. So, the best term for ecosystems like rivers and streams is lotic systems.

Flowing-water habitats are defined by the movement of water downstream, which creates a continuous current and unique physical conditions. Lotic systems capture this idea perfectly, covering rivers and streams where water flow shapes the environment, oxygen dynamics, sediment transport, and the organisms adapted to living in currents. This contrasts with still-water environments, where water isn’t moving—these are called lentic systems. The term “riverine habitats” is descriptive of streams and rivers but isn’t the standard category for the whole flowing-water concept, and “aquatic systems” is too broad, since it includes both flowing and still waters. So, the best term for ecosystems like rivers and streams is lotic systems.