Streams and rivers belong to which type of ecosystem?

• A. Lentic ecosystems
• B. Transitional ecosystems
• C. Lotic ecosystems
• D. Fluvial ecosystems

Answer: (C)

Streams and rivers are classified as lotic ecosystems because they are characterized by flowing water. The term "lotic" comes from the Latin word "lotus," meaning "to wash" or "to flow." This classification encompasses any aquatic ecosystem where water is in motion, distinguishing it from lentic ecosystems, which refer to still water bodies such as lakes and ponds.

Lotic ecosystems include a variety of flowing water environments, from small creeks to large rivers. The flow of water in these systems significantly influences their physical and biological properties, such as sediment transport, nutrient cycling, and the types of organisms that can inhabit these waters. The continuous movement of water also creates distinct habitats and ecological dynamics, making lotic ecosystems unique compared to static bodies of water.

Understanding this classification helps in recognizing the ecological processes and species that thrive in flowing environments, underscoring the importance of conservation efforts for these vital water systems.