Tracing land-derived nitrogen into Delaware's Inland Bays

One of our projects focuses on tracing the pathway of different nitrogen sources from the land surface, into the groundwater, into the estuary and ultimately into tissues of primary producers and consumers in Delaware’s Inland Bays.  We are primarily using stable isotopes of nitrogen, oxygen, and other elements to track land-derived nitrogen from different sources on the watershed as it travels to the estuary and triggers changes in the estuarine ecosystem.


Featured Faculty

Joanna York

Joanna York picture

Research Assistant Professor Marine Biosciences


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 Geological 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

Investigating the interactions between people and the environment and the processes that explain the location of human and natural phenomena.

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College of Earth, Ocean, and Environment • 111 Robinson Hall • Newark, DE 19716 • USA • Phone: 302-831-2841
Geography: 302-831-2294 • Geology: 302-831-2569 • Marine Science and Policy: 302-645-4212 • E-mail:

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