How a thumb-sized climate migrant with a giant crab claw is disrupting the Northeast's Great Marsh ecosystem

Map showing the northeast United States with labels of the historic range of fiddler crabs and locations north of Cape Cod where they have been recorded. David S. Johnson.

Read PIE researcher, David Samuel Johnson's article in The Conversation about fiddler crab migration north into the Great Marsh and their impact on the ecosystem. Dr. Johnson is an Associate Professor of Marine Sciences at Virginia Institute of Marine Science.