As per my understanding, the amount of toxic substances increases in one secondary consumer because it eats more than 1 primary consumers. Now, decomposers occupy a trophic level higher than that of the secondary consumers. so the amount of toxic material in one decomposer should be more than a secondary consumer. but a single decomposer consumes very tiny amount of secondary consumers. how is it possible for them to have higher toxicity than secondary consumers?

Asked by Aradhana Goswami | 11th Jan, 2014, 12:23: AM

Expert Answer:

As per biomagnification, the amount of toxic substances accumulate at largest in a predator that is at the top most level of food chain.
Decomposers attain a trophic level higher to conumers, they feed on dead and decying organisms and break down their complex substances into simple one.
The decomposers are tiny organisms so in proportion to their biomass the concentration of toxic substances will be high.

Answered by Hemangi Binny | 14th Jan, 2014, 07:49: AM

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