Iron stocks, isotopy and dynamics in the Wüstebach catchment

Iron (Fe) is a key element with multiple interaction mechanisms in the cycles of all three major nutrients (carbon, nitrogen and phosphorus). As large deforestation actions are expected to influence ecosystem nutrient cycling, we aimed to determine the impact of the clear-cut on Fe reservoirs and cycling. We further hypothesized that the main source of riverine Fe would change with seasons in the Wüstebach catchment as two distinct hydrological regimes prevailed in summer and winter. We determined Fe content and isotopic composition of different compartments (soil, plant, water) in order to: (i) estimate Fe pool sizes in the catchment and (ii) identify the main seasonal sources of the riverine Fe