Figure 1

Concentrations of TN, TFAA, Gln, Asn, Glu and Arg in moss from Suburban, Zoo, Airport, Landfill and Urban in Nanchang city: (a) TN, (b) TFAA, (c) Gln, (d) Asn, (e) Glu and (f) Arg. Bars represent mean values ± standard deviations. Significantly different mean values (HSD Tukey’s, p < 0.05) of TN and FAA from different sampling sites are indicated with superscript letters ‘A’ and ‘B’.