Table 1. Size of the sample (N), Mean, Standard Deviation (SD), Median, Minimum, Maximum Values and Values in the Control for (i) the pollutants measured in the biomonitor: copper (Cu) (µg/g DW), zinc (Zn) (µg/g DW), manganese (Mn) (µg/g DW), iron (Fe) (µg/g DW), lead (Pb) (µg/g DW), nickel (Ni) (µg/g DW), arsenic (As) (µg/g DW), total nitrogen (N) (%/DW), the ratio between total carbon and total nitrogen (C:N), ammonium (NH4+) (µg/g DW); (ii) vitality indicator of the mosses measured by Fv/Fm in relation to the values in the control per season (%); and (iii) the QBR index total score (QBR Total) (%) and its four components (TRC = total riparian cover, CS = cover structure, CQ = cover quality, and CA = channel alteration; ranging from 0–25%).

N Mean SD Median Minimum Maximum Control
Metal pollutant concentrations in the moss
Cu (µg/g DW) a 39 13.91 8.65 12.16 5.856 56.70 9.60
Zn (µg/g DW) a 39 65.55 37.08 53.07 28.105 253.15 44.00
Mn (µg/g DW) a 38 6405.94 5557.05 5115.13 206.091 24098.35 -
Fe (µg/g DW) a 39 21019.99 12185.93 17070.35 6684.753 61639.08 7719.71
Pb (µg/g DW) a 38 1.40 0.86 1.21 0.110 3.36 1.04
Ni (µg/g DW) a 9 0.69 0.23 0.69 0.327 1.08 17.20
As (µg/g DW) a 39 18.07 16.82 11.10 2.700 74.78 5.09
Eutrophication indicators measured in the moss
N (%/DW) a 39 2.29 0.47 2.37 1.172 3.48 2.52
C:N a 39 15.00 3.24 14.91 8.711 26.35 16.98
NH4+ (µg/g DW) b 9 113.93 96.74 97.56 30.000 341.46 75.67
Vitality indicator of the moss
Fv/Fm (%) a 37 77.25 25.93 86.58 0.000 105.03 n.a
Integrity Biotic Index of the stretches of the stream
QBR Total (%) c 39 68 20 70 20 100 80
TRC (0-25%) c 39 10 8 10 0 25 15
CS (0-25%) c 39 18 7 20 3 25 25
CQ (0-25%) c 39 18 9 23 0 25 25
CA (0-25%) c 39 21 6 25 5 25 15
a average values for the time period from September 2004 to June 2005.
b values assessed from March to June 2005.
c values assessed from March to June 2006.