Finding carbon in soils is easy, tracing where it came from is hard and tracing that carbon *down* the soil profile is even harder. Here I presented some of my dissertation work where we examine plant derived carbon compounds across the NEON sites, and down soil profiles often reaching 1-meter or more in depth.
There's a lot of interest around fires effects on soil. What's less often discussed is how well the soil records fire by the presense of Pyrogenic Carbon (PyC). We used the NEON sites and quantified how much PyC was present, and its relative quality, down soil profiles often reaching 1-meter in depth. Turns out, fire *was* everywhere.
Forest soils are can be resilient to harvesting, but what about two or three or four rotations worth of biomass removals? Here I present some work from my Masters, combining it with one chapter of my dissertation on the resilience of soil-C following harvesting (it's all the roots!)