Figure 4: Earthworm effects on carbon distribution and humification in aggregates. | Nature Communications

Figure 4: Earthworm effects on carbon distribution and humification in aggregates.

From: Earthworms facilitate carbon sequestration through unequal amplification of carbon stabilization compared with mineralization

Figure 4

(a) Carbon distribution and (b) δ15N in phase I. In all panels, mean values are shown±1 s.e.m. (n=3); the s.e.m. is indicated by error bars. The intensity of humification (and concomitant mineralization) is indicated by the natural abundance of 15N. Asoil: A. agrestis-worked soil; Lsoil: L. rubellus-worked soil; control soil: sieved field soil which had not been worked with earthworms. FPOM: floatable POM. For a given size class of aggregate, bars with no letters in common are significantly different (P<0.05), whereas those sharing the same letters are not significantly different (P>0.05).

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