There are two main types of water communities – freshwater and saltwater. Freshwater communities include ponds, lakes, rivers, and marshes. In summer, some ponds are so covered with plants that you can hardly see the water underneath. Saltwater communities are found along sea coasts. There, the tides rise and fall, so the plants are sometimes above water and sometimes underwater.
Plants that grow in and around watery places give food and shelter to many animals. Grebes and other water birds use these plants to make nests. Muskrats eat plants such as cattails and also use them for building houses. Frogs often fasten their eggs to water plants. When the eggs hatch, the tadpoles use the plants as food. Bass and other big fish hide among water plants. From these hiding places, they dart out to snap up careless frogs and small fish.
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