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Continental-scale Controls on Soil C Dynamics.

Leveraging the National Ecological Observatory Network (NEON;

neoninc.org) to understand the mechanisms and controls over the

stabilization and vulnerability of soil organic matter.


Soil Processes Under Variable Hydroclimate Conditions.

Working at the Coweeta LTER (coweeta.uga.edu) to understand how

predicted changes in precipitation patterns will affect the fluxes and

distribution of soil C and N in the southern Appalachian mountains.


Coupled Hydrological and Biogeochemical Processes.

Predicting C and nutrient export from forested watersheds through a

combined understanding of hydrological drivers and biogeochemical

reactivity using a physical soil model at the Coweeta Hydrologic Lab.


N Use Efficiency and Ecosystem N Retention.

Using stable
isotopically labeled additions to understand the fate of

applied fertilizer N across the range of loblolly pine in the South and

Douglas-fir in the Pacific Northwest.


Soil Biogeochemistry in Novel Bioenergy Systems. 

Investigating the linked cycles of C, nutrients and water in a loblolly pine-

switchgrass intercropping system designed to simultaneously maximize

productivity for biofuels and forest products.


Reforestation Impacts on Water Quality.

Quantifying the contributions of reforestation in minimizing delivery of total dissolved solids to surface waters in the Central Appalachian Coal Basin disturbed by surface mining.


Interactions Between Climate Change and Forest Management.

Investigating the effect of climate gradients and altered precipitation on soil properties and process as they relate to the sustained production of loblolly pine and atmospheric feedbacks of the silvicultural system. (pinemap.org)


Stable Isotope Mapping to Predict Ecosystem N Retention.

Correlating soil and foliar 15N natural abundance signatures to ecosystem N retention and growth response following fertilization in loblolly pine and Douglas-fir forests of the US South and Pacific Northwest, respectively.