Producers: Green plants act as producers.. As discussed previously, they utilized the sun light, CO2 and water to prepare the food for other organisms.

Consumers: These includes crustaceans, worms, insect larvae and fishes.

Decomposers: Dead plants and animals form the organic debris in the pond. The decomposer such as bacteria and fungi decay dead body into the simple organic and inorganic substances.

 

Figure 38.2: Fresh Pond ecosystem.