Talonpoikajäkälärapu

Talonpoikajäkälärapu is the Finnish common name for a species of freshwater crustacean. Its scientific name is Gammarus lacustris. This amphipod is a small, shrimp-like invertebrate that typically inhabits clear, cold freshwater environments. It is found in lakes and streams across Europe and Asia, including in Finland.

The talonpoikajäkälärapu plays an important role in aquatic ecosystems. It is a detritivore, meaning it feeds on decaying organic matter such as dead plant material and algae. This scavenging behavior helps to break down organic waste and recycle nutrients within the water body. It also serves as a food source for a variety of fish and other aquatic predators, contributing to the food web.

These crustaceans are characterized by their laterally compressed bodies and their ability to swim using their legs. They are sensitive to water pollution and are often considered an indicator species for healthy aquatic habitats. Changes in their population or absence can signal a decline in water quality. The presence of talonpoikajäkälärapu is generally a positive sign for the ecological health of a freshwater system.