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Temperature controls carbon cycling and biological evolution in the ocean twilight zone

Boscolo-Galazzo, F; Crichton, KA; Ridgwell, A; Mawbey, EM; Wade, BS; Pearson, PN; (2021) Temperature controls carbon cycling and biological evolution in the ocean twilight zone. Science , 371 (6534) pp. 1148-1152. 10.1126/science.abb6643. Green open access

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Abstract

Theory suggests that the ocean’s biological carbon pump, the process by which organic matter is produced at the surface and transferred to the deep ocean, is sensitive to temperature because temperature controls photosynthesis and respiration rates. We applied a combined data-modeling approach to investigate carbon and nutrient recycling rates across the world ocean over the past 15 million years of global cooling. We found that the efficiency of the biological carbon pump increased with ocean cooling as the result of a temperature-dependent reduction in the rate of remineralization (degradation) of sinking organic matter. Increased food delivery at depth prompted the development of new deep-water niches, triggering deep plankton evolution and the expansion of the mesopelagic “twilight zone” ecosystem.

Type: Article
Title: Temperature controls carbon cycling and biological evolution in the ocean twilight zone
Open access status: An open access version is available from UCL Discovery
DOI: 10.1126/science.abb6643
Publisher version: https://doi.org/10.1126/science.abb6643
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10123909
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