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Frequency of major bacterial groups in 16S rRNA clone libraries for soil collected in winter, spring, and summer. Error bars are standard errors for three spatial replicates. acido, Acidobacterium; actino, Actinobacteria; alpha, beta, gamma, and delta, α, β, γ, and δ subgroups of Proteobacteria, respectively; Verruco, Verrucomicrobium; other, other miscellaneous bacterial divisions.
