Publications
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: 901
Two more yellow-headed blackbirds banded near Laurel, Maryland
No abstract available.
Authors
B. Meanley
Geohydrologic reconnaissance of the upper Potomac River basin
The upper Potomac River basin, in the central Appalachian region in Pennsylvania, Maryland, Virginia, and West Virginia, is a humid temperate region of diverse fractured rocks. Three geohydrologic terranes, which underlie large parts of the basin, are described in terms of their aquifer characteristics and of the magnitude and duration of their base runoff: (1) fractured rock having a thin regolit
Authors
Frank W. Trainer, Frank A. Watkins
The seventy-fourth Christmas bird count. 333. Little Creek, Va
No abstract available.
Authors
P. Sykes
The seventy-fourth Christmas bird count. 320. Back Bay National Wildlife Refuge, Va
No abstract available.
Authors
P. Sykes
The seventy-fourth Christmas bird count. [Untitled. Summary for Delaware, Maryland, District of Columbia, and Virginia]
No abstract available.
Authors
D.R. Bystrak
The winter bird survey of central Maryland, U.S.A
A method for monitoring changes in winter bird populations was tested in central Maryland in the winters of 1970, 1971 and 1972. A systematic sample of 41 transects was established to sample an area of 6150 sq. km. Each transect, located at the center of a standard 7 1/2-minute topographic map, was 8 km in length and approximately square in shape. Coverage began at local sunrise on any one day fro
Authors
C.S. Robbins, D. Bystrak
The 1973 distribution and abundance of breeding ospreys in the Chesapeake Bay
An aerial survey in association with several intensive ground surveys yielded the first estimate of the size of the osprey (Pandion haliaetus carolinensis) nesting population in Chesapeake Bay. The 1973 population was estimated at 1,450 ± 30 pairs, of which 713 were on the western shore and 737 on the eastern shore. A small percentage of nonbreeders (possibly 2-5 percent) may be included in this e
Authors
Charles J. Henny, Morton M. Smith, Vernon D. Stotts
The breeding bird atlas of Montgomery County, Maryland, USA
A two-year Breeding Bird Atlas program for Montgomery County was undertaken by the Maryland Ornithological Society in 1971-1972. The county was divided into 65 5 km blocks and each block was assigned to an observer. Preliminary results show 46 to 93 species (mean 66) recorded per 5 km block and from 10 to 52 species (mean 28) confirmed per block. When the data are combined into 10 km block, the
Authors
M. K. Klimkiewicz, C.S. Robbins