Zebra Mussels

The reading and the lecture are both about zebra mussels. The reading claims that the presence threatens the freshwater fish population in all North America and provides three reasons. Whereas, the lecturer refutes each point by providing reasons and examples.

First, the article states that zebra mussel's invasion has been made possible by human transportation, ships. While the professor says that people could not prevent the invasion in the past. But now, there are ways to keep them out of North America. Furthermore, he suggest that if the ship depletes the water in the ocean and refill, the salt water will kill the zebra mussels.

Second, the author of the reading contends that zebra mussels can dominate the new habitat because they have