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 Shippers slow down to protect whales after close calls in the San Francisco Bay Experts say warmer waters, possibly linked to climate change could be making the situation even more dangerous.
