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Graudally ,the more complex animals such as crabs ,frogs and fish return to the pond.The vegetation in the water consists of floating weeds and rooted vegetation on the peiphery whose roots are in the muddy floor under the water and whose foliage emerges out of the surface of the water.
As the pond fills inthe monsson season , a large number of food chains are formed .The algae are eaten by microscopic animals,which are turn eaten by small fush on which the larger carnivorous fish depend .These are in turn eaten by birds of prey.Aquatic insects,worms and snails feed on the waste material excerted by animals and animal matter.They act onthe dertius ,which is broken down into nutrients which aquatic plants can absorb,thus completing the nutrient cyle in the pond .The temporary ponds begin to dry up after the rains and the surrounding grasses and terrestrial plants spread into the moist mud that us exposed.Animals like frogs,snails and worms remain formant in the mud ,awsting the next monsoon.