Micromorphological and Chemical Approaches to Understand Changes in Ecological Functions of Metal-Impacted Soils under Various Land Uses

Table 5

Distribution (%) of organic and inorganic components in thin sections of the soil horizons under various land uses in Cartagena (SE Spain).

	Industrial			Urban		Natural		Agricultural
	A	C1	C2	A	C1	A	C1	A	C1
Slightly decomposed organic matter	4	0	0	0	0	0	0	0	0
Moderately decomposed organic matter	1	0	0	4.5	1.8	0	0	0	0
Intensively decomposed organic matter	10	4.7	12	14.3	8	6.9	5.4	4.4	4
Insect remains	0	0	0	0	0	0	0	0	0
Fungal remains	0	0	0	0.9	0	0	0	2	0
Recent excrements	0	0	0	2.7	0	0	0	3	2
Ancient excrements	1	0	2	0	0.9	0	0	0	0
Voids	18	18.9	21	29.5	20.5	42.6	35.9	33.4	31.7
Free mineral grains	1	0.9	1	0	0	2	50	2.2	1
Course mineral components in aggregates	18	11.3	16	24.1	32.1	5.9	0	5.5	5
Fine mineral components in aggregates	47	64.2	48	24.1	36.6	42.6	8.7	48.5	56.4