1. Fig. 1 Biomass over time of C3 grasses and C4 grasses at ambient and elevated CO2.
Biomass over time of C3 grasses and C4 grasses at ambient and elevated CO2. Total biomass (aboveground + 0 to 20 cm belowground) of plots comprising C3 grasses and C4 grasses in ambient CO2 (red) and elevated CO2 (blue) from 1998 to Data are shown as moving 3-year averages centered over the middle of each 3-year group. Each point represents data pooled across N treatments, and across monoculture and four-species plots (equally weighted), for each functional group (n = 22 plots for each functional group at each CO2 level). See Table 1 for statistical analysis and fig. S1 for annual data and information on variation in response within treatments.
Peter B. Reich et al. Science 2018;360:
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