What will happen if we kill all the organisms in one trophic level?

by killing 2 or more organisms, you will disrupt the chain and can lead to loss of other organisms higher in the levels and lower level organisms will increase in volume

Answer: If we kill all the organisms in one trophic level, then transfer of energy as well as matter to next higher level will stop. It will lead to over - population at one particular level causing amongst the individuals. This would seriously disturb the food chain and can cause the collapse of an ecosystem even.