The four types of organisms that live in aquatic ecosystems are:
1) Plankton: These are tiny organisms that drift or float in the water and can be classified into phytoplankton (plant-like) and zooplankton (animal-like). Examples include diatoms, copepods, and krill.
2) Nekton: These are larger, actively swimming organisms in the water that can move independently of water currents. Examples include fish, whales, and squid.
3) Benthos: These are organisms that live on or in the bottom of bodies of water. They can be found in sediments or attached to hard surfaces. Examples include crabs, clams, and sea stars.
4) Decomposers: These organisms play a crucial role in breaking down dead organic matter in aquatic ecosystems, recycling nutrients back into the environment. Examples include bacteria, fungi, and some types of worms.
These four types of organisms interact with each other and their environment to form complex food webs and contribute to the overall health and functioning of aquatic ecosystems.
