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

Abstract

Terrer et al. (Reports, 1 July 2016, p. 72) used meta-analysis of CO2 enrichment experiments as evidence of an interaction between mycorrhizal symbiosis and soil nitrogen availability. This Comment challenges 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.