Dirty oxigen

“Climate change affects marine fishes through the oxygen limitation of thermal tolerance. Laboratory data … led to the hypothesis that, as a unifying principle, a mismatch between the demand for oxygen and the capacity of oxygen supply to tissues is the first mechanism to restrict whole-animal tolerance to thermal extremes … thermally limited oxygen delivery closely matches environmental temperatures beyond which growth performance and abundance decrease.” Hans O. Pörtner and Rainer Knust, Science, January 5th.