introduced mollusks

"This title explores the invasion of zebra mussels, including where they came from and their impact within biomes and food webs"--OCLC.

"This title explores the invasion of zebra mussels, including where they came from and their impact within biomes and food webs"--OCLC.

"Through reading about how zebra mussels came to freshwater lakes, readers learn what invasive species are and how they can cause great harm to native ecosystems. Facts about the spread of zebra mussels and efforts to stop this spread introduce readers to conservation..."--Publisher.