Research Projects

An historical perspective on land-use change
and N loading in the Narragansett Bay watershed
This study uses data on population, agricultural land-use history, and sewage system construction, to model trends in Nitrogen loads to Narragansett Bay over the past 120+ years.

Soil Organic Matter in Northern Mongolia:
Permafrost and Land-Use interactions
Permafrost soils contain approximately 15% of global soil carbon.  In Northern Mongolia, both global warming and livestock grazing threaten the future of the southernmost belt of permafrost
soils.  This study explores the role of both factors in potentially releasing large amount of carbon from storage in soils to the atmosphere.

Biogeochemical consequences of land-use transitions along Brazil's agricultural frontier
In the last half-decade, the southwestern Brazilian Amazon has begun rapid transformation from natural vegetation and pastures to mechanized agriculture with significant impacts on regional biogeochemistry. Quantifying land use transitions and modeling biogeochemical consequences are critical. Greenhouse gas fluxes (CO2 and N2O) from mechanized agriculture depend on crop type, management regime, and other biophysical parameters. In Mato Grosso and Rondnia states, we use MODIS and remote sensing tools to delineate major crop types- soybean, maize, rice, millet, and cotton. Remote sensing information and new biogeochemical field data will be used to improve and iteratively test the process-based Terrestrial Ecosystems Model (TEM). We use georeferenced databases of model drivers such as temperature, precipitation, and soil type to apply the model at regional scales. The improved TEM will estimate regional fluxes of CO2 and N2O associated with agricultural intensification to determine the biogeochemical impacts of land cover change.
Ecosystem responses to soil warming in New England forests
To better describe the potential net C balance as northern forests warm, I am working on a project concurrently study belowground rhizosphere and aboveground vegetative dynamics as part of an integrated characterization of the biotic and abiotic responses to chronic soil warming of a temperate forest experimental area.
Exurban Sprawl in the Northern Forest: The Role of Local Planning in Conserving Ecosystem Goods and Services
We are working to understand the rural-to-exurban shift occurring in many New England towns with particular focus on the town of Campton, NH. Specifically, we investigate spatial trends of growth and how these trends relate to town level management of population changes, as well as the various landscape impacts resulting from development-driven land-use change.
Carbon Cycle Impacts of Exurban Development in Northern New England
One of the most important land-use changes in the northeastern United States is exurban expansion, with the conversion of forestlands into low-density housing lots.  In order to understand the implications of this changing land-use within one of the strongest carbon sinks in the world the eastern forest biome of North America we quantified carbon stock losses due to increasing human disturbance associated with home construction within second-growth forests of central New Hampshire. 
Soil Carbon and Nitrogen Dynamics on a post-agricultural Chronosequence
We are completing a 25-year remeasurement of soil carbon and nitrogen on a chronosequence of abandoned plowed fields on Bald Mountain in Campton, NH.
Land-use influences on Sudanian landscape-scale vegetation change Burkina Faso, West Africa
We are striving to untangle the physical, demographic, and political drivers in changing patterns of vegetation under the influence of exclusive grazing use, intense agricultural use, and mixed uses in Sudanian West Africa.
Environmental Change in the Great Basin
Understanding land cover change in semi-arid environments is critical because they contain unique, fragile ecosystems, take a long time to recover from damage, and cover up to 1/3 of land surfaces. The Great Basin, US, is a dynamic system of ecological communities that respond to human land use, both past and present, as well as natural climate variability. Our challenge is to understand how land cover change today reflects both natural and anthropogenic influence.
55 Years of Land-Use/land cover Change in Israel
We are using maps, satellite data, and statistical archives to track rates of development of open spaces in Israel. Further, we are assessing the environmental and ecological impact of these changes historically, and building models to assess future impacts.
A History of Population Change in New England, 1790 - 2000
Environmental & Socio-Economic Influences on the Spatial Distribution of People.
Historical Land Use Change in Grafton County, NH
Using extensive historical and present-day land use/cover data, we explore the linkages between past and present land use decisions their impacts on the northern forest ecosystem and the services it provides.

Climate Change Mitigation and Sustainable Development in Peru
A feasibility study of “Carbon Emissions Trading” through forestry management strategies in the Peruvian Amazon. This research project explores the realities associated with carbon emissions trading both from an ecological and social perspective.

Drivers of surface thermal change in Southern New England using Landsat thermal infrared



Updated 05/22/2008

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