Casting Activity of Scherotheca gigas in No-Till Mediterranean Soils: Role in Organic Matter Incorporation and Influence of Aridity

Table 2

Content in clay, total organic C, and C in the form of POM (C-POM) in bulk soil samples and in Scherotheca gigas casts at the three study sites. Values marked with ∗ are significantly different (𝑃<.05) between soil and casts for each parameter and site. Values followed by the same letter in the same row belong to the same Duncan’s homogeneous groups (𝑃<.05) for each parameter among sites. Means ± standard error (𝑛=3).

Study site		Pamplona	Olite	Santacara
Clay (g/kg)	Soil	306.2 ± 6.7^*a	426.2 ± 2.04^*b	284.8 ± 2.6^*a
	Casts	233.4 ± 2.5^*b	234.8 ± 22.2^*b	165.2 ± 6.8^*a
Total OC (g/kg)	Soil	14.03 ± 0.42^*b	14.32 ± 0.66^*b	12.55 ± 0.22^*a
	Casts	21.93 ± 0.78^*a	26.23 ± 1.81^*b	19.13 ± 0.36^*a
C-POM (g/kg)	Soil	2.77 ± 0.12^*ab	3.66 ± 0.52^*b	2.16 ± 0.07^*a
	Casts	6.47 ± 0.37^*a	9.52 ± 0.27^*b	8.47 ± 0.89^*ab
C-POM/Total OC	Soil	0.20 ± 0.01^*a	0.25 ± 0.03^*b	0.17 ± 0.00^*a
	Casts	0.29 ± 0.01^*a	0.36 ± 0.02^*ab	0.44 ± 0.04^*b