Question

A chemical leaks into a pond that selectively kills off the phytoplankton (a producer). many of the other organisms in the pond die over a short period of weeks, and the overall species diversity declines. the phytoplankton in this pond could be considered a good example of a(n) _____ species.

Answer 1

Keystone species

Step-by-step explanation:

Answer 2

I know this is late but hopefully my answer will help other people. The answer is (Keystone Species)