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In January 2008, most of the southern coastal zone of the Humboldt Current System was affected by an intense upwelling event. This caused an intrusion of equatorial sub-surface water into the coastal zone, generating severe hypoxic conditions (≤0.5 ml O 2 l −1 ) three days after the beginning of the event. A rapid, massive die-off of marine organisms occurred in Coliumo Bay on January...
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