1. Removal of organisms from any tropic level of a food chain or food web disturbs the ecosystem and leads to ecological imbalance. 

2. If we remove predators from food web, the prey population will increase enormously as there is no natural control over them. 

3. The producers population will decrease rapidly as the organisms feeding on them increase. 

4. After few generations the prey population also begins to decrease as some of the preys begin to die due to starvation. 

5. Some adaptations may also be developed by the organisms to bring the ecological balance. 

6. But it may take some generations, till that the ecosystem will be disturbed and imbalanced. 

7. For example, if we remove all the predators (carnivorous) from a forest ecosystem, the herbivorous animal population will increase as there are no carnivores to hunt them. 

8. As a result plant population will decrease as the ever increasing herbivores feed more and more on plants. 

9. After some generations the herbivore population begins to decrease as the decreasing number of plants are not sufficient to feed. 

10. Then some herbivorous animals may adapt to feed on other herbivores to increase their survival. 

11. Then scope for survival will increase for plants again which leads to ecological balance. 

12. But this may take lot of time to evolve new predators and to form ecological balance.