Ecophysiology of coral reef primary producers across an upwelling gradient in the tropical central Pacific.

Although in some instances photophysiology was enhanced at the more nutrient-enriched islands, the overall patterns were variable across taxa and did not indicate a clear trend of physiological enhancement.

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However, this pattern obscures a marginally significant 45% increase in net photosynthesis at the southernmost island (Flint) ( S3 Table ), and a significant 173% increase in respiration rates at the northern islands ( Table 2 ).

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Indeed, photosynthetic efficiency of coral and algal taxa was highest at most northern islands sampled, and there was an overall trend of increasing photosynthetic efficiency with increasing exposure to equatorial upwelling.

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