The level of oxygen in the St. Lawrence estuary has fallen significantly in recent decades. The causes and long-term effects of this phenomenon are poorly understood and worry researchers. ... The affected underwater region is located near Tadoussac and off Rimouski. The oxygen that marine life depends upon has fallen by roughly half since the 1930s, according to Alfonso Mucci, a professor in the Department of Earth and Planetary Sciences at McGill University. ... Professor Mucci explained how according to one model currently being developed, hypoxia could get worse in the years to come.
Read the full article (in French) from Le Devoir