FIGURE 2 in Taxonomy of epilithic diatoms and teratological forms under the presence of metals in surface sediment

FIGURE 2. Variability of environmental data for the eight sampling sites in the Cascavel River micro-watershed, Paraná State, Brazil. a) Principal Component Analysis for abiotic data analyzed from water samples (BOD: Biochemical Oxygen Demand; NO: nitrate; 3 Cond: electrical conductivity; DS: dissolved solids; TP: total phosphorus; PO −: Component 4 orthophosphate). b) Principal Analysis for metals data analyzed in the surface sediment (Co: cobalt, Cr: chromium, Cu: copper, Mn: manganese, Ni: nickel, Pb: lead, Zn: zinc). The sampling sites for surface sediment were represented by polygons.