what would happen if an organism is removed from a food web?

There will be far-reaching effects. If for example, the
producer is removed, the consequences could be dire. Producers capture sunlight directly
and make chemical energy for consumers. If this is the only producer that a particular
consumer eats, it may die as well. Pandas eat only bamboo. As bamboo is removed from the
habitat, pandas will eventually diminish and possibly die off. If a secondary consumer
or tertiary consumer were removed, for example, wolves, the primary consumers
overpopulate. This is seen in places where wolves once roamed and no longer do. Deer are
overpopulating out of control and they are exceeding the carrying capacity for their
range. The deer population can experience an explosion and subsequent die off due to
starvation. As you can see, no matter where the food web loses a member, the effects are
great.