Freshwater ecosystems are environments where water with low salt concentration, such as rivers, lakes, ponds, and wetlands, supports a variety of life. These ecosystems are crucial for biodiversity, providing habitats for species like fish, amphibians, and aquatic plants. They also play a vital role in the water cycle and help filter pollutants. These ecosystems are essential for human activities, offering resources like drinking water, irrigation for agriculture, and recreational opportunities. Freshwater ecosystems are sensitive to changes, such as pollution and climate change, which can threaten their health and the species that depend on them.