
Algae blooms are promoted by fertilisers leaching into coastal waters from agricultural and sewage runoff.
The toxin remains even when the algae dies off and sinks with it to the bottom, instead of being dissolved in seawater. This would explain the dead zones at lower depths in a growing number of marine areas. "[It is also] the missing link to explain why domoic acid also shows up in benthic organisms like crabs, shellfish and flatfish," says Raphael Kudela, one of the study’s authors.
(Source: New Scientist) | For further info...