Linking Soil Iron Reduction Processes from Centimeter to Ecosystem Scales.

Iron minerals play important roles in governing soil nutrient availability and carbon dynamics. Periods of intermittent anoxia (low-oxygen) in upland soils can drive microbial reduction and dissolution of iron minerals. However, quantifying ecosystem-scale iron reduction in upland soils is challenging. We will present data using a combination of localized sensors and in situ incubations that are scaled to the landscale using electromagnetic induction (EMI) to estimate soil texture and water content. The work takes place at the Luquillo and Calhoun critical zone observatories.