The changes in R/S and ROC/SOC ratios were also higher in Leirdalur when calculated for the whole rooting depth; but both ratios were lower in the top 30 cm of the oldest dune in Leirdalur than in Surtsey.
Uppsöfnun kolefnis, bæði rótarkolefnis (ROC) og jarðvegskolefnis (SOC) var meiri í Leirdal, en þar var róta-sprota hlutfall (R/S) og ROC/SOC samt lægra í efstu 30 cm jarðvegsins í elstu melhólnum en í Surtsey.