There are two types of water on Earth. Saltwater and freshwater. Saltwater has a lot of salt in it, and freshwater does not have very much salt. Oceans are salt water. Lakes, ponds, swamps, streams, and rivers are freshwater.
Places that have freshwater are called freshwater aquatic biomes. Biomes are areas on Earth with similar climates, animals, and plants. For example, a freshwater aquatic biome could be made up of a lake, the land surrounding the lake, the plants growing in and around the lake, and the animals and insects that live in and around the lake. It would also include all of the non-living things such as rocks, soil, and sunlight.
Many organisms live in freshwater biomes. You can find plants such as cattails, lily pads, and duckweed. Cattails are an important part of a pond environment. Blackbirds and ducks both nest among the cattails. Also, ducks and fish eat parts of the cattails. However, in some ponds cattails can become a problem. They can take up space and prevent other plant species from growing.
There are also many animals living in freshwater aquatic biomes. Many different species of fish swim in the fresh water. There are also frogs, birds, turtles, beavers, otters, and insects. The river otter is an example of an animal that lives in a freshwater aquatic biome.
Plants and animals get everything they need to survive within the biome. The plants get energy from the Sun. Insects eat the plants, fish eat the insects, and river otters eat the fish. Plants also provide shade and protection for the insects and small animals that live around the pond.
All of the organisms living in freshwater aquatic biomes have adapted to survive in that environment.