GEOLOGY

Detailed explanation-1: -They play a vital role in aquatic ecosystems by forming the energy base of the food web for all aquatic organisms. As autotrophic organisms, algae convert water and carbon dioxide to sugar through the process of photosynthesis.

Detailed explanation-2: -Phytoplankton and algae form the bases of aquatic food webs. They are eaten by primary consumers like zooplankton, small fish, and crustaceans. Primary consumers are in turn eaten by fish, small sharks, corals, and baleen whales.

Detailed explanation-3: -Few creatures of these ecosystems include shellfish, shark, tube worms, crab small and large ocean fishes, turtles, crustaceans, blue whale, reptiles, marine mammals, seabirds, plankton, corals and other ocean plants. They are the open systems of land and water which are joined together to form the coastal ecosystems.

Detailed explanation-4: -They are quite an essential part of the aquatic ecosystem. Furthermore, they provide oxygen to the animal species living underwater. It is very important for their metabolic processes. Moreover, they also supply food to some of the species of animals living underwater.