Plant nutrient acquisition under elevated CO2 and implications for the land carbon sink

Trevor W. Cambron (), Joshua B. Fisher, Bruce A. Hungate, Benjamin D. Stocker, Trevor Keenan, Iain Colin Prentice and César Terrer ()
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Trevor W. Cambron: Massachusetts Institute of Technology
Joshua B. Fisher: Chapman University
Bruce A. Hungate: Northern Arizona University
Benjamin D. Stocker: University of Bern
Trevor Keenan: University of California, Berkeley
Iain Colin Prentice: Imperial College London
César Terrer: Massachusetts Institute of Technology

Nature Climate Change, 2025, vol. 15, issue 9, 935-946

Abstract: Abstract Terrestrial ecosystems currently sequester around one-third of the anthropogenic carbon emitted each year, slowing the pace of climate change. However, the future of this sink under rising atmospheric CO2 concentrations remains uncertain, in part due to the impact that nutrient limitation may have on plant biomass. Here we review plant nutrient acquisition strategies and evidence of the enhanced utilization of these strategies under experimental and real-world elevated CO2. Many of the strategies that are key to alleviating nutrient limitation under elevated CO2 are not well represented in current Earth system models, and a simple data-driven analysis implies that models that do not account for nutrient acquisition strategies could underestimate the land sink.

Date: 2025
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DOI: 10.1038/s41558-025-02386-y

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