Ecosystem biogeochemistry | Associate Professor at UC Riverside | 2017 Ford postdoc fellow | bilingüe 🇨🇴🇺🇲| he/him | Views are my own
Pete Homyak
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These findings establish topography-mediated hydrology as a primary control of forest soil N dynamics and gaseous N emissions, reducing uncertainty in forecasts of hillslope-scale N losses under a changing climate.
📢 Call for Expression of Interest – Marie Skłodowska-Curie Global Fellowship (MSCA PF)
We are looking for a candidate to develop a proposal on:
Nitrogen cycling in arid and/or drought-affected ecosystems, with a focus on soil microbial processes (including fungi).
We measured over 2 years of high-resolution in situ NO and N2O fluxes to show that soil moisture gradients governed spatial and temporal patterns of soil N emissions. These gradients produced tradeoffs in process controls:
The spring freeze–thaw period accounted for 15%–26% of NO and 24%–58% of N2O annual emissions, with the highest emissions measured consistently at lower topographic positions.
Temperature regulated N emissions in drier upper positions, giving way to soil moisture regulating microbial pathways and emissions in wetter downslope positions.
