Question

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.

Answer 1

c. the impact of removing or adding organisms to an ecosystem.

Explanation: The comb jelly was an introduced (invasive) species whose addition dramatically altered food web dynamics by consuming zooplankton and fish larvae, leading to declines in native fish populations.