Technical Comments

Comment on “Mycorrhizal association as a primary control of the CO2 fertilization effect”

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Science  27 Jan 2017:
Vol. 355, Issue 6323, pp. 358
DOI: 10.1126/science.aai7976

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Terrer et al. (Reports, 1 July 2016, p. 72) used meta-analysis of carbon dioxide (CO2) enrichment experiments as evidence of an interaction between mycorrhizal symbiosis and soil nitrogen availability. We challenge their database and biomass as the response metric and, hence, their recommendation that incorporation of mycorrhizae in models will improve predictions of terrestrial ecosystem responses to increasing atmospheric CO2.

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