Spatial Variability of Heavy Metals in Soils and Sediments of “La Zacatecana” Lagoon, Mexico

Table 4

Mean and standard errors of physicochemical characteristics of soils and sediments from the La Zacatecana Lagoon. Sites denoted by different letters in the same column differ significantly at in one-way ANOVA tests (Tukey’s post hoc analysis).

Sampling sites	pH	Electrical conductivity (dS/m)	Organic matter content (%)	Redox potential (mV)
I	8.7 ± 0.1 cd	1.7 ± 0.1 b	4.3 ± 0.2 a	−121 ± 19 h
II	8.5 ± 0.1 de	0.7 ± 0.05 f	1.5 ± 0.05 ef	12 ± 6 fg
III	9.6 ± 0.1 a	1.2 ± 0.1 d	1.7 ± 0.1 e	14 ± 5 fg
IV	9 ± 0.1 b	1.7 ± 0.1 b	1.5 ± 0.1 ef	194 ± 13 bc
V	8.3 ± 0.00 e	1 ± 0.05 e	2.9 ± 0.1 c	26 ± 7 f
VI	8.5 ± 0.01 de	1.3 ± 0.05 c	2.6 ± 0.1 cd	23 ± 4 fg
VII	7.7 ± 0.1 g	0.4 ± 0.05 g	2.3 ± 0.1 d	86 ± 27 e
VIII	7.8 ± 0.1 g	2 ± 0.00 a	1.6 ± 0.10 ef	308 ± 0.3 a
IX	8 ± 0.05 f	1 ± 0.02 e	3.9 ± 0.1 ab	109 ± 3 de
X	7.8 ± 0.05 fg	1.6 ± 0.05 b	3.6 ± 0.1 b	149 ± 6 cd
XI	8.9 ± 0.05 bc	1.3 ± 0 cd	1.2 ± 0.05 f	271 ± 6 a
XII	8.9 ± 0.05 bc	0.8 ± 0 f	2.4 ± 0.05 d	202 ± 6 b
XIII	8.9 ± 0.05 bc	19 ± 0 a	3.4 ± 0.1 b	−6.5 ± 8.8 fg
XIV	8.9 ± 0.05 bc	0.9 ± 0.01 e	1.2 ± 0.05 f	−26 ± 10 g