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Phylum-level composition of cbhI sequences in DNA- and cDNA-based libraries from each of the field treatments. Each bar represents an average percent ± 1 SE (n = 3). Ascomycota are in dark gray, and Basidiomycota are in light gray. A, ambient CO2; AF, ambient CO2, N fertilization; E, elevated CO2; EF, elevated CO2, N fertilization.
