As recently as July, densities of adult zebra mussels in places Spear was monitoring were about 10-to-15 individuals per square meter, extremely low by standards of the Great Lakes region, Spear says, adding: “about as low as you’ll find them in systems where they’re known to exist.”
However, “we saw a very strong recruitment event in mid-August,” Spear says, “which boosted densities from 10-20 per square meter, upwards of 200 per square meter in some places. If any decent proportion of these young mussels are left by reproduction time next year, I think we will definitely be seeing continued exponential growth of the population.”
This is what an invasion looks like.
This is a dragonfly nymph with two freaking zebra mussels on it. They attached and grew between molts! I knew they could grow fast but I didn't know it was that fast.
If you love those lakes, get out there and take a good look before the snow flies. Gonna be a different lake next summer.