Puget Sound eelgrass beds create a 'halo' with fewer harmful algae, new method shows

DNA clues show that eelgrass growing underwater along Washington state shorelines is associated with fewer of the single-celled algae that produce harmful toxins in shellfish. Observations show this effect extends 45 feet beyond the edge of the eelgrass bed.

source https://www.sciencedaily.com/releases/2020/06/200624172049.htm