Carbon concentrations and specific carbon fractions of soils and sediments for different zones and events.

C in free light fraction = free particulate organic C, fPOC; C in occluded light fraction = occluded particulate organic C, oPOC; C in heavy fraction = mineral-associated organic C, MOC. Results are shown as mean and standard error of three replicates.a. Carbon concentration of bulk soils (mg C g−1 soil).b. Carbon concentration of the three density fractions fPOC, oPOC and MOC in relation to the total weight of that specific soil fraction (mineral + C parts) (mg C g−1 soil fraction).c. Carbon enrichment ratios, calculated on the basis of mg C soil fraction g−1 soil organic C.d. Relative proportion of MOC (%SOC) in bulk soils, density fractions and sediments of overland flow for the first (Overland flow 1) and fourth rainfall event (Overland flow 4).