Then -  when was it? - shocking changes started to occur: eel grass was overwhelmed by algae infestations, went into distress and death by the dozens of acres, followed by many more. Whole vast aquatic ecosystems asphyxiated, as all oxygen is consumed by massive layers of short-lived dead rotting algae.

Then – when was it? – shocking changes started to occur: eel grass was overwhelmed by algae infestations, went into distress and death by the dozens of acres, followed by many more. Whole vast aquatic ecosystems asphyxiated, as all oxygen is consumed by massive layers of short-lived dead rotting algae.