Question

What is the possible consequences of adding an organism to a food chain?

Answer 1

Answer. The organism that is added will compete for food resources with an existing organism. This could possibly lead to competitive exclusion.

Answer 2

If an invasive species is added into a food chain/web, it becomes overpopulated/a pest because it has no natural predators.

It can also disrupt the food chain/web by eating the food supplies of the native organism leading to competitions.