When the comb jelly, mnemiopsis leidyi, was introduced into the black sea, its population exploded to 500 comb jellies per cubic yard in 1988. the jellies devoured all the zooplankton and fish larvae, drastically reducing the numbers of the native fish populations. this situation demonstrates?

a.
the difference between biotic and abiotic factors in an ecosystem.
b.
effects of local evolution or migration on an ecosystem.
c.
the impact of removing or adding organisms to an ecosystem.
d.
the types of interactions between organisms in an ecosystem.

The correct answer is c. the impact of removing or adding organisms to an ecosystem.

This represents a perfect example of the effects that a species not native to certain ecosystem introduced in it can do to the native species and cause total disruption in the ecosystem in which it has been introduced. This example is just one of many where people have introduced species to totally different ecosystems and the results are usually very bad, like with the cats in Australia or rats in New Zealand, which resulted of the dying out of lot of native species and lots of others are on the verge of dying out.

answers.com says temperate reagions