ACIDIFICATION AND HYPOXIA IN ESTUARIES

What is it about?

Estuaries are particularly vulnerable to climate change. We show for the first time that a large estuary on the west coast of Canada has elevated levels of total carbon dioxide and low pH relative to the surrounding ocean. We also show that estuaries with restricted entrances and sufficient tidal mixing are more vulnerable to future ocean acidification than hypoxia (low oxygen).

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Why is it important?

Estuaries often experience enhanced anthropogenic pressure, provide habitat for diverse and productive ecosystems and also are excellent sites for aquaculture. Decreasing oxygen levels and pH, both anticipated in future, negatively impact marine ecosystems and both shellfish and fin-fish aquaculture.