Question

What will happen if we kill all the organism in one tropic level

Answer 1

The impact of removing all the organisms in a trophic level will be same. If the organisms of any trophic level be removed it will certainly damage the ecosystem. ... If snakes are removed then the number of frogs will increase which will disturb the entire ecosystem.

Answer 2

If an organism of one trophic level is killed or becomes extinct, ecological imbalance would occur. One species would grow in population
and the species the latter is dependant on becomes endangered.

For example,if all lions are killed then deers would grow in population and the grass on which the deers feed would become inadequate.