Projects: Soil Biogeochemistry and Plant Dynamics

Our research goals are to advance our understanding of ecosystem processes, biogeochemical cycles, soil-plant-atmosphere interactions, and their impact from and feedback to climate change. We develop novel tools with observational, experimental, and modeling approaches to enhance our ability to quantitatively describe and simulate greenhouse gas (CO2, CH4, and N2O) emissions, carbon and nitrogen cycles, and their linkage with ecosystem phenology. We study a variety of ecosystems including temperate forests, agro-ecosystems, coastal salt marsh, and Arctic tundra.

The ongoing projects include

1) Abiotic and biotic controls of soil respiration and soil carbon dynamics at Harvard Forest;

2) Greenhouse gas (CO2, CH4, N2O) emissions from agro-ecosystems and their responses to fertilization and management;

3) Greenhouse gas emissions and carbon sequestration in response to nitrogen loading in a coastal salt marsh in Massachusetts;

4) Using in-situ spectroscopy, ground-based cameras, satellite remote sensing, and modeling to understand plant phenology and leaf biochemical properties;

5)  Effects of warming and changes in seasonality on soil carbon fluxes and belowground processes in tundra ecosystems in northern Alaska.

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