. 2012 May 14;19(3):369–376. doi: 10.1016/j.sjbs.2012.05.002

Table 2.

Means ± SD of diversity and edaphic variables of the different vegetation groups.

Variable	Vegetation group
Variable	A	B	C	D
Species richness	9.8^a ± 1.5	13.5^b ± 1.4	11.7^c ± 1.0	8.1^d ± 1.3
Shannon index	1.61^a ± 0.12	1.41^a ± 0.24	1.63^a ± 0.22	1.50^a ± 0.28
CaCO₃ (%)	3.0^a ± 1.0	3.3^a ± 0.9	3.3^a ± 0.9	3.2^a ± 0.9
${HCO}_{3}^{-} (%)$	0.07^a ± 0.01	0.07^a ± 0.01	0.07^a ± 0.02	0.06^a ± 0.01
pH	7.7^a ± 0.2	7.6^a ± 0.1	7.7^a ± 0.2	7.7^a ± 0.2
Electrical conductivity (mS/cm)	0.68^a ± 0.06	0.87^b ± 0.14	0.90^b ± 0.19	0.74^a ± 0.07
Organic carbon (%)	0.52^a ± 0.14	0.95^b ± 0.11	0.92^b ± 0.12	0.60^a ± 0.13
Gravels (%)	10.0^a ± 2.3	9.2^a ± 2.7	9.4^a ± 2.6	10.2^a ± 2.1
Coarse and medium sand (%)	35.8^a ± 3.9	32.5^a ± 3.0	33.0^a ± 3.0	35.7^a ± 4.1
Fine and very fine sand (%)	37.8^a ± 4.0	39.4^a ± 3.4	38.0^a ± 3.9	37.3^a ± 4.1
Silt and clay (%)	16.4^a ± 1.6	18.9^b ± 1.4	19.6^b ± 1.3	16.9^a ± 1.7

Values in a row sharing the same letter are not significantly different at the 0.05 level of probability.