3 ms·

In North America, earthworms are an invasive species...

• kevin_thibedeau 4y ago
  There are native worms. The red wigglers are introduced to the north but the natives would have migrated there eventually.
  • smallerfish 4y ago
    Right, but for thousands of years there was apparently no worm population. The plant composition changed significantly once worms became widespread. So they're beneficial in some cases, but not essential ecosystem cogs.
    • kevin_thibedeau 4y ago
      They don't live under ice. There were worms before the ice. It's not as big a deal as the doom trollers make it out to be. The earth has never been a static system.