Question

zebra mussels were first discovered in north america in the great lakes in 1988. this invasive species eats phytoplankton and other microscopic organisms in fresh water. what would be the most likely effect if zebra mussels are introduced into a local freshwater lake? the zebra mussels would only affect the lake if it already contained another species of mussels. the zebra mussels would benefit the lake, especially species higher up on the food chain. the ecosystem would benefit from the increased competition for food and increased diversity. the ecosystem would be harmed, as other phytoplankton - eating organisms would have less to eat.

Explanation:

Zebra mussels are invasive and eat phytoplankton. This would reduce food for other phytoplankton - eating organisms, harming the ecosystem.

Answer:

The ecosystem would be harmed, as other phytoplankton - eating organisms would have less to eat.