It would throw it out of balance
balance
A new species, when introduced to an ecosystem, will compete with the indigenous species for food and resources. If the new species is predatory, it may also begin preying on the indigenous species, so the native populations will decrease sharply.
An extinction of one species could destroy an ecosystem if an animal depended on the extinct animal for food. Then that animal would die off, which could affect even more animals.
A keystone species is one that other lifeforms in an ecosystem depend on. Mosquitoes are a keystone species because they are extremely low on the food chain, and if they were removed from an ecosystem, the food supply would be interrupted.
food chain
The food chain maybe?
food web
For maintains the ecosystem and the food chain
it effects the food chains
Over population of a particular species will cause the food chain in that ecosystem to become unstable. Over population will also reduce the amount of producers within an ecosystem (depending if the over population is of a consumer) and will lead to the decrease of other animal species inhabiting the same ecosystem.
The ecosystem is capable of mainting food for many species.
food web, just took the test ;)
the whole ecosystem would collapses because in an ecosystem species depend on each other to maintain a balance. Next time look in you science book please!!!!!!!