Chesapeake Bay Activities


The Chesapeake Bay is our Nation’s largest estuary and provides over $100 billion in annual economic value. The USGS works with Federal, State, local, and academic partners to provide research and monitoring and to communicate results to inform management for the Chesapeake and other important landscapes across the Nation. See our Science page to learn about our themes and topics being addressed.

Land-Use Influences on Estrogenic-Endocrine Disruption in Fish

Land-Use Influences on Estrogenic-Endocrine Disruption in Fish

Effects of exposure to estrogenic-chemical contaminants have been observed in many fish species worldwide. One effect is described as “intersex” because fish will take on characteristics of the other sex, such as immature eggs forming in male fish.

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Nutrient Trends and Drivers in the Chesapeake Bay Watershed

Nutrient Trends and Drivers in the Chesapeake Bay Watershed

Trends in nitrogen and phosphorus, and the complex factors affecting their change, provide important insights into the effectiveness of efforts to reduce nutrients from reaching the tidal waters of the Bay.

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Quick Links

Learn more about USGS science activities in the Bay from our Science Strategy. Additional summaries of the USGS Chesapeake Bay Activities are available in the science topics section.

Science Summaries, Features, and Videos

Chesapeake Bay Activities Bibliography

Chesapeake Bay Newsletter

Science Activities

USGS Chesapeake Bay Science Fact Sheet


Date published: February 25, 2021

Land use tied to ‘intersex’ smallmouth bass in Bay rivers

Bay Journal — By Timothy Wheeler — February 25, 2021

February 24, 2021

Chesapeake Bay Activities Newsletter January-February 2021

The USGS provides research and monitoring to better understand and restore the Chesapeake Bay and its watershed. Our technical reports and journal articles, which we translate into science summaries, provide the findings used by federal, state, and local decisionmakers to inform restoration and conservation decisions. Here are some recent highlights.

Learn more about USGS Chesapeake Bay activities

Date published: February 17, 2021

Fact sheet on nutrient trends in the Chesapeake now available

University of Maryland | Center for Environmental Science | Integration and Application Network — February 2021


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Year Published: 2021

Nutrient trends and drivers in the Chesapeake Bay Watershed

The Chesapeake Bay Program maintains an extensive nontidal monitoring network, measuring nitrogen and phosphorus (nutrients) at more than 100 locations on rivers and streams in the watershed. Data from these locations are used by United States Geological Survey to assess the ecosystem’s response to nutrient-reduction efforts. This fact sheet...

Hyer, Kenneth E.; Phillips, Scott W.; Ator, Scott W.; Moyer, Douglas L.; Webber, James S.; Felver, Rachel; Keisman, Jennifer L.; McDonnell, Lee A.; Murphy, Rebecca; Trentacoste, Emily M.; Zhang, Qian; Dennison, William C.; Swanson, Sky; Walsh, Brianne; Hawkey, Jane; Taillie, Dylan
Hyer, K.E., Phillips, S.W., Ator, S.W., Moyer, D.L., Webber, J.S., Felver, R., Keisman, J.L., McDonnell, L.A., Murphy, R., Trentacoste, E.M., Zhang, Q., Dennison, W.C., Swanson, S., Walsh, B., Hawkey, J., and Taillie, D., 2021, Nutrient trends and drivers in the Chesapeake Bay Watershed: U.S. Geological Survey Fact Sheet 2020–3069, 4 p.,

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Year Published: 2021

Spatial and temporal patterns of low streamflow and precipitation changes in the Chesapeake Bay Watershed

Spatial and temporal patterns in low streamflows were investigated for 183 streamgages located in the Chesapeake Bay Watershed for the period 1939–2013. Metrics that represent different aspects of the frequency and magnitude of low streamflows were examined for trends: (1) the annual time series of seven‐day average minimum streamflow, (2) the...

Fleming, Brandon J.; Archfield, Stacey A.; Hirsch, Robert M.; Kiang, Julie E.; Wolock, David M.

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Year Published: 2020

Assessing native fish restoration potential in Catoctin Mountain Park

Biological conservation is a fundamental purpose of the National Park system, and Catoctin Mountain Park (CATO) supports high-quality habitat for native fishes in the headwaters of the Chesapeake Bay watershed in eastern North America. However, native Blue Ridge sculpin (Cottus caeruleomentum) have been extirpated in Big Hunting Creek above...

Hitt, Nathaniel P.; Kessler, Karmann G.; Kelly, Zachary A.; Rogers, Karli M.; Macmillan, Hannah E.; Walsh, Heather L.
Hitt, N.P., Kessler, K.G., Kelly, Z.A., Rogers, K.M., Macmillan, H.E., and Walsh, H.L., 2020, Assessing native fish restoration potential in Catoctin Mountain Park: U.S. Geological Survey Open-File Report 2020–1137, 17 p.,