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Updated: Jun 24, 2026
07:26
Visualizing Methane-Cycling Microbial Dynamics in Coastal Wetlands
Published on: January 31, 2025
Changes in biogenic carbon flow in response to sea surface warming
Julia Wohlers1, Anja Engel, Eckart Zöllner
1Departments of Biological Oceanography, IFM-GEOMAR Leibniz Institute of Marine Sciences, Düsternbrooker Weg 20, 24105 Kiel, Germany. jwohlers@ifm-geomar.de
Summary
Rising ocean temperatures accelerate carbon consumption, reducing the ocean
Area of Science:
- Marine biology
- Oceanography
- Climate change science
Background:
- The pelagic ocean is a vast ecosystem crucial for global primary production, fisheries, and the carbon cycle.
- Ocean warming from climate change impacts marine life and ecosystem services.
- Differing temperature sensitivities in marine processes cause shifts in pelagic carbon and energy flow.
Purpose of the Study:
- To investigate the impact of rising temperatures on carbon cycling in pelagic ecosystems.
- To address the lack of empirical data for integrating biological responses into climate models.
Main Methods:
- Utilized an indoor-mesocosm approach with a natural plankton community.
- Simulated ocean warming by increasing temperatures by 2-6 degrees C.
Main Results:
- Warming accelerated respiratory carbon consumption over autotrophic production.
- Biological drawdown of dissolved inorganic carbon decreased by up to 31%.
- Warming shifted organic carbon partitioning, increasing dissolved compounds and reducing sinking loss.
Conclusions:
- Ocean warming alters biogenic carbon flow, potentially reducing transfer to higher trophic levels.
- The ocean's biological carbon pump may be weakened by rising temperatures.
- Observed changes suggest a positive feedback loop to increasing atmospheric CO(2).
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