Effect of Mining Activities in Biotic Communities of Villa de la Paz, San Luis Potosi, Mexico
Table 1
Concentrations (mg/kg) of As, Cu, Pb, and Zn in soil by vegetation type.
Vegetation types
Site
As
Cu
Pb
Zn
RDS
Reference
46.8
16.3
16.8
57.7
(12.0–23.0)
(10.0–20.0)
(23.8–97.6)
(45.0–125.0)
Contaminated
222.1*
231.9*
204.3*
175.4*
(125.8–329.3)
(155.0–382.5)
(117.9–487.1)
(125.0–275.0)
MDS
Reference
23
25.6
23.5
87.3
(18.3–38.5)
(22.5–30.0)
(15.9–31.2)
(57.5–280.0)
Contaminated
7902.6*
703.7*
1228.2*
3513.5*
(502.0–17325.0)
(292.5–1080.0)
(428.1–2226.8)
(505.0–6325.0)
NOM-147-SEMARNAT/SSA1-2004 agricultural/residential land
22
—
400
—
CEQG agricultural land
12
63
70
200
The values represent the mean and range. RDS: rosettophyllous desert scrub; MDS: microphyllous desert scrub. *Statistically different concentrations () in relation to the reference site; —: not mentioned.
