Evolutionary temperature compensation of carbon fixation in marine phytoplankton.

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ID: 95624
2020
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Abstract
The efficiency of carbon sequestration by the biological pump could decline in the coming decades because respiration tends to increase more with temperature than photosynthesis. Despite these differences in the short-term temperature sensitivities of photosynthesis and respiration, it remains unknown whether the long-term impacts of global warming on metabolic rates of phytoplankton can be modulated by evolutionary adaptation. We found that respiration was consistently more temperature dependent than photosynthesis across 18 diverse marine phytoplankton, resulting in universal declines in the rate of carbon fixation with short-term increases in temperature. Long-term experimental evolution under high temperature reversed the short-term stimulation of metabolic rates, resulting in increased rates of carbon fixation. Our findings suggest that thermal adaptation may therefore have an ameliorating impact on the efficiency of phytoplankton as primary mediators of the biological carbon pump.
Reference Key
barton2020evolutionaryecology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Barton, Samuel;Jenkins, James;Buckling, Angus;Schaum, C-Elisa;Smirnoff, Nicholas;Raven, John A;Yvon-Durocher, Gabriel;
Journal Ecology letters
Year 2020
DOI
10.1111/ele.13469
URL
Keywords
climate change metabolism evolutionary ecology phytoplankton physiology thermal performance curves

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