Climate Effects on Subsoil Carbon Loss Mediated by Soil Chemistry

Too many people focus on surface soils, and they're missing out on most of the (soil carbon) action when they do. Here we show that ecosystems favoring forests (wetter, more iron and aluminum) release more CO2 compared to grassland-like ecosystems (dryer, more calcium and magnesium). As our earth warms, we need to consider not only how surface soils will change due to management, but how subsurface soils (where most of the carbon is) will respond due to climate change.

Key predictors of soil organic matter vulnerability to mineralization differ with depth at a continental scale

SOM *storage* is not the same as its *vulnerability*. This was a 1-yr incubation experiment from NEON's A and B horizons ran by Tyler Weiglein at Virginia Tech as his Masters degree. We found that predictors of soil carbon vulnerability (based on CO2 respiration) were different for surface and subsurface horizons. Turns out, you need to dig deeper to find out the whole story on soils.