Question

in which part of a pond ecosystem decomposers are abundant

Answer 1

Most of the decomposers  of Pond ecosystem are saprophytes but some parasites are also found .Bacteria,fungi like AspergillusCladosporium Rhizopus,Alternaria,Fusarium,Saprolegniaetc are decomposers.Generally the decomposers either live in the soil layer beneath water or in the mud.They act on dead and decayed organic matter of plants and animals and supply raw materials to the producers.

Answer 2

Abundant decomposers are found in the places of deposits of dead and decaying matters such as dead fish, dead bodies of some humans may be considered.