Click on image to view larger version.
Fig. 5. Kruskal's Non-Metric Multidimensional Scaling (KNMDS) analysis of denaturing gradient gel electrophoresis (DGGE) profiles from tailings treatment plots as a function of time. Symbols include no compost (NC) (circle), compost (C) (triangle), and unplanted control (U) (square). For each plot, solid lines delineate clusters that are significantly different from each other and dashed lines delineate clusters that show a trend but are not significantly different from each other. The 0 mo plot represents samples taken before transplants were established (stress factor = 0.013, D = 3) (D, dimension) and shows three clusters that are significantly different (p = 0.06). The 3 mo plot (stress factor = 0.026, D = 3) shows no significant clusters. The 5 mo plot (stress factor = 0.069, D = 3) shows two clusters that are significantly different from each other (p = 0.02). The 7 mo plot (stress factor = 0.071, D = 3) shows two clusters that are not significantly different (p = 0.18). The 11 mo plot (stress factor = 0.026, D = 3) shows three significantly different clusters (p = 0.01) and the 13 mo plot (stress factor = 0.023, D = 4) shows three clusters (p = 0.41).
