Write the common food chain of a pond ecosystem.
Producers: Rooted or floating plants usually algae, called phytoplankton are the major autotrophs that act as the food sources to consumers.
Consumers are of two types:
Big Fish/Animals/Birds consume the small fish.
So the food chain is as follows:
Algae ---------Protozoa ———Small fish —— Large fish/bird/animal
(Producer) (Herbivore) (Carnivore) (Large carnivore)