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The USGS publishes peer-reviewed reports and journal articles which are used by Chesapeake Bay Program resource managers and policy makers to make science-based decisions for ecosystem conservation and restoration. Use the Search box below to find publications on selected topics.

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Filter Total Items: 943

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January 1, 1983

Distribution of submersed aquatic macrophytes in the tidal Potomac River Distribution of submersed aquatic macrophytes in the tidal Potomac River

Results of a 3-year survey (1978?1980) and review of historic trends have shown a major decline in the number of species and the distribution of submersed aquatic macrophytes in the tidal Potomac River since the early 1900's. The freshwater tidal river is essentially devoid of plants and only very sparse populations remain in the mesohaline section of the estuary. Present plant...

Authors

G.M. Haramis, V. Carter

Ecosystems Mission Area, Eastern Ecological Science Center, Chesapeake Bay Activities

January 1, 1983

Description of a high-resolution seismic reflection profile collected between the Chesapeake Bay, Virginia and Cape Romain, South Carolina, Sept. 26 to Oct. 2, 1981 (Cruise RV Gyre 81-G-14) Description of a high-resolution seismic reflection profile collected between the Chesapeake Bay, Virginia and Cape Romain, South Carolina, Sept. 26 to Oct. 2, 1981 (Cruise RV Gyre 81-G-14)

No abstract available.

Authors

Peter Popenoe

Chesapeake Bay Activities

January 1, 1983

Submersed aquatic plants of the tidal Potomac River Submersed aquatic plants of the tidal Potomac River

No abstract available.

Authors

Virginia Carter, Patricia T. Gammon, Nancy C. Bartow

Chesapeake Bay Activities

January 1, 1983

Seasonal energetics and behavior of captive canvasbacks (Aythia valisineria) Seasonal energetics and behavior of captive canvasbacks (Aythia valisineria)

Dramatic changes in the food habits and distribution of Chesapeake Bay canvasbacks (Aythya valisineria) generated a desire to better understand the energetics and behavior of this species on its wintering grounds. Captive canvasbacks were maintained ad libitum on 5 diets during the winters of 1978-80 to evaluate varying protein and energy levels in the diets. Food consumption, weight...

Authors

Matthew C. Perry, Wayne J. Kuenzel

Ecosystems Mission Area, Chesapeake Bay Activities, Eastern Ecological Science Center

January 1, 1983

Primary productivity by phytoplankton in the tidal, fresh Potomac River, Maryland, May 1980 to August 1981 Primary productivity by phytoplankton in the tidal, fresh Potomac River, Maryland, May 1980 to August 1981

Primary productivity by phytoplankton was measured on samples collected from the Potomac Tidal River, Maryland. The studies were performed monthly from May 1980 to September 1981. Additional studies were done once a week in August 1980, twice a week from August 4 to 8, 1980 and twice in September 1980. Depth-integrated samples were collected at five stations and incubated in boxes that...

Authors

R.R. Cohen, S.O. Pollock

Chesapeake Bay Activities

January 1, 1982

Maryland breeding bird atlas project Maryland breeding bird atlas project

No abstract available.

Authors

C.S. Robbins

Ecosystems Mission Area, Eastern Ecological Science Center, Chesapeake Bay Activities

January 1, 1982

Benthic phosphorus regeneration in the Potomac River Estuary Benthic phosphorus regeneration in the Potomac River Estuary

The flux of dissolved reactive phosphate from Potomac riverine and estuarine sediments is controlled by processes occurring at the water-sediment interface and within surficial sediment. In situ benthic fluxes (0.1 to 2.0 mmoles m-2 day-1) are generally five to ten times higher than calculated diffusive fluxes (0.020 to 0.30 mmoles m-2 day-1). The discrepancy between the two flux...

Authors

E. Callender

Chesapeake Bay Activities

January 1, 1982