Mycorrhizal association as a primary control of the CO2 fertilization effect

César Terrer, Sara Vicca, Bruce A. Hungate, Richard P. Phillips, I. Colin Prentice

Research output: Contribution to journalArticlepeer-review

409 Scopus citations


Plants buffer increasing atmospheric carbon dioxide (CO2 ) concentrations through enhanced growth, but the question whether nitrogen availability constrains the magnitude of this ecosystem service remains unresolved. Synthesizing experiments from around the world, we show that CO2 fertilization is best explained by a simple interaction between nitrogen availability and mycorrhizal association. Plant species that associate with ectomycorrhizal fungi show a strong biomass increase (30 ± 3%, P < 0.001) in response to elevated CO2 regardless of nitrogen availability, whereas low nitrogen availability limits CO2 fertilization (0 ± 5%, P = 0.946) in plants that associate with arbuscular mycorrhizal fungi. The incorporation of mycorrhizae in global carbon cycle models is feasible, and crucial if we are to accurately project ecosystem responses and feedbacks to climate change.

Original languageEnglish (US)
Pages (from-to)72-74
Number of pages3
Issue number6294
StatePublished - Jul 1 2016

ASJC Scopus subject areas

  • General


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