Research Article
Growth of Photosynthetic Biofilms and Fe, Pb, Cu, and Zn Speciation in Unsaturated Columns with Calcareous Mine Tailings from Arid Zones
Table 3
Relative abundance of the sulfur-oxidizing bacteria (SOB) and of the sulfate reducing bacteria (SRB) before the assay () and in the columns after the wet () and dry () seasons, per stratum.
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Note: number of cells in each of the 10 visual fields: −: 0; +: ≤10; ++: ≤20; +++: ≤40. |