Seems more likely the old mines in the area are causing the contamination with BMAA and that it is being consumed in shellfish. BMAA contamination is often associated with old flooded mine shafts, and there are several in the area where these people are getting sick, most of them upstream.
Not sure why you're assuming this has anything to do with climate change. What could be the link there?
Not sure why you're assuming this has anything to do with climate change. What could be the link there?