Linking variability in soil solution dissolved organic carbon to climate, soil type, and vegetation type

摘要: Lateral transport of carbon plays an important role in linking the cycles terrestrial and aquatic ecosystems. There is, however, a lack information on factors controlling one main C sources this lateral flux, i.e., concentration dissolved organic (DOC) soil solution across large spatial scales under different soil, vegetation, climate conditions. We compiled database DOC down to 80 cm analyzed it with aim, first, quantify differences concentrations among ecosystems, zones, vegetation types at global scale second, identify potential determinants site-to-site variability European broadleaved coniferous forests. found that were 75% lower mineral than temperate sites showed higher boreal tropical sites. The majority variation (R2 = 0.67–0.99) forest soils correlates NH4+, C/N, Al, Fe as most predictors. Overall, our results show magnitude (23% forests) differ between types, site productivity being more forests water balance stands.