What is an invasive species?

Text Assignment Chapters 6 and 7:Questions from Chapter 6 (pages 97-109)1. What is an invasive species? What is being done with Phragmites along the York River?2. What did Charles Elton say about invasive plants?3. Are all invasive species a problem?Questions from Chapter 7 (pages 111-122)1. What is meant by novel ecosystems?2. What did Ariel Lugo find in the pine plantations when compared with the tropical forests?3. What did Joe Mascaro show the author at the “mango forest” in Hawaii?4. What does Erle Ellis say about novel ecosystems?