theconversation.com The westward spread of zebra and quagga mussels shows how tiny invaders can cause big problems Zebra and quagga mussels entered the Great Lakes in large ships’ ballast water. Now, local boaters and anglers are spreading them into the southern and western US.
Impacts National parks are being overrun by invasive species Causing more habitat damage than natural disasters, these creatures put native wildlife at risk. Here’s how you can help stop them.
