Didymo: A Video Diary from Jason du Pont on Vimeo.
Anyone who cares about rivers needs to watch this 25-minute film that follows the progression of a didymo bloom in the Gunpowder River in Maryland. You’ll be astounded by how quickly the river is transformed as the bloom progresses, and a once-clear freestone stream becomes a gunked-up, brown mess. If you ever needed a reason to take personal measures that halt the spread of aquatic nuisance species, this ought to do it. Didymo is no longer “someone else’s problem.” Thanks to guide Jason du Pont for his dedication to this project.