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Joanna York

Research Assistant Professor

I am interested in the linkages between human activities on land and conditions in estuaries and coastal embayments. My work spans the range from coastal watersheds to estuaries and uses several tools, including chemical tracers and modeling approaches, to identify sources of nutrients to coastal waters, and traces their impacts on these ecosystems. I am primarily focused on delivery and transformations of nitrogen. 


B.A., Environmental Science, University of Virginia, 1997

Ph.D., Marine Ecology, Boston University, 2006

Research Areas

Investigating the role of groundwater-borne nutrients in structuring the phytoplankton community of the Inland Bays, DE

Tracing land-derived nitrogen into Delaware's Inland Bays

Nutrient sources in suburbanizing watersheds

Impacts of changing land-use and climate change on Delmarva's lagoons






MAST100 Marine Science Colloquium I
MAST100 Field trip

MAST100 Field trip to UD Campus in Lewes

MAST314 Comparative Terrestrial and Marine Ecology

MAST314 Comparative Terrestrial and Marine Ecology

MAST201 Marine Science Colloquium III

MAST201 Field trip to the St. Jones River Estuary


• Marine Chemistry• Geochemistry


CEOE School & Departments

School of Marine Science & Policy

Advancing the understanding, stewardship, and conservation of estuarine, coastal, and ocean environments.

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Department of Earth Sciences

Discovering how geological processes have operated over various time scales to create and influence the planet’s surface environments.

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Department of Geography and Spatial Sciences

Providing a unique spatial perspective that seeks to explain patterns of differences and commonality across the human and natural environment.

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College of Earth, Ocean, and Environment • 111 Robinson Hall • Newark, DE 19716 • USA • Phone: 302-831-8062
Geography and Spatial Sciences: 302-831-2294 • Earth Sciences: 302-831-2569 • Marine Science and Policy: 302-645-4212 • E-mail: ceoe-info@udel.edu

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