Carbon–Mercury Interactions in Spodosols Assessed through Density Fractionation, Radiocarbon Analysis, and Soil Survey Information

Spodosols are the **most** photogenic soils *(personal opinion)*. Their dark organic surface horizons, followed by a light colored mineral horizon, then bookend-ed with another very dark - often red - mineral horizon makes these tri-colored soils magnificent to stare at. These Spodosols are relatively rare, but concentrated in a few places in the US where historical anthropogenic emissions are the most likely sources of Mercury. In this paper we focus on different Spodosols around the US, combining pedologic and geochemical analysis to identify how carbon and mercury interact down the soil profile.

The Morphology of Burnt Dirt: A pedologic investigation of fire history across ecosystems

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.

Does Root Carbon from Harvested Trees Replace Mineral Carbon? Effects of LTSP Treatments in a Western Oregon Douglas-fir Forest

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!)

Responses in soil following intensive biomass and compaction treatments in the Oregon Cascades

I hope you enjoy my Masters Defense. It was a labor of love.