Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
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Reproduction and distribution of bald eagles in Voyageurs National Park, Minnesota, 1973-1993 Reproduction and distribution of bald eagles in Voyageurs National Park, Minnesota, 1973-1993
The bald eagle (Haliaeetus leucocephalus) is classified as a threatened species in Minnesota. In 1973, the National Park Service began monitoring the distribution and reproduction of bald eagles in and immediately adjacent to Voyageurs National Park to obtain data that park management could use to protect bald eagles from the effects of use of the park by visitors and from the expansion...
Authors
Leland H. Grim, Larry W. Kallemeyn
Geochemical and hydrologic controls on phosphorus transport in a sewage-contaminated sand and gravel aquifer near Ashumet Pond, Cape Cod, Massachusetts Geochemical and hydrologic controls on phosphorus transport in a sewage-contaminated sand and gravel aquifer near Ashumet Pond, Cape Cod, Massachusetts
The disposal of secondarily treated sewage onto rapid infiltration sand beds at the Massachusetts Military Reservation, Cape Cod, Massachusetts, has created a sewage plume in the underlying sand and gravel aquifer; the part of the\x11sewage plume that contains dissolved phosphorus extends about 2,500 feet downgradient of the sewage-disposal beds. A part of the plume that\x11contains...
Authors
D. A. Walter, B.A. Rea, K.G. Stollenwerk, Jennifer G. Savoie
Monitoring flooding in coastal wetlands by using radar imagery and ground-based measurements Monitoring flooding in coastal wetlands by using radar imagery and ground-based measurements
Satellite radar was used in a Florida Juncus roemerianus marsh to map tidal flooding, a critical control of coastal vegetation distribution. Radar images taken during a time of near-continuous recordings of ground-based hydrology measurements directly linked marsh flooding to lowered radar returns and indicated a negative covariation between flood frequency and radar return. Flood-extent...
Authors
Elijah Ramsey
[Book review] Antarctic Seals: Research Methods and Techniques, edited by R. M. Laws [Book review] Antarctic Seals: Research Methods and Techniques, edited by R. M. Laws
Review of: Antarctic Seals: Research Methods and Techniques. Edited by R. M. LAWS. Cambridge: Cambridge University Press (1993). Pp. xxii+390. Price $84.95.
Authors
C. J. Deutsch
Treeshelters in Louisiana coastal swamps: An update Treeshelters in Louisiana coastal swamps: An update
Abstract has not been submitted
Authors
J. A. Allen
Reservoir water quality at Corydon, Iowa Reservoir water quality at Corydon, Iowa
No abstract available.
Authors
Matthew W. Bobier
Marine turtles in the Southeast Marine turtles in the Southeast
Five species of marine turtles frequent the beaches and offshore waters of the southeastern United States: loggerhead (Caretta caretta), green (Chelonia mydas), Kemp's ridley (Lepidochelys kempii), leatherback (Dermochelys coriacea), and hawksbill (Eretmochelys imbricata). All five are reported to nest, but only the loggerhead and green turtle do so in substantial numbers. Most nesting...
Authors
C. Kenneth Dodd
Comparison of methods for conducting marine and estuarine sediment porewater toxicity tests—extraction, storage, and handling techniques Comparison of methods for conducting marine and estuarine sediment porewater toxicity tests—extraction, storage, and handling techniques
A series of studies was conducted to compare different porewater extraction techniques and to evaluate the effects of sediment and porewater storage conditions on the toxicity of pore water, using assays with the sea urchin Arbacia punctulata. If care is taken in the selection of materials, several different porewater extraction techniques (pressurized squeezing, centrifugation, vacuum)...
Authors
R.S. Carr, D.C. Chapman
Seasonal abundance and habitat use of selected snakes trapped in xeric and mesic communities of north-central Florida Seasonal abundance and habitat use of selected snakes trapped in xeric and mesic communities of north-central Florida
Abstract not supplied at this time
Authors
C.K. Dodd, R. Franz
Formation and regression of the corpus luteum of the American alligator Formation and regression of the corpus luteum of the American alligator
Luteal morphology of the American alligator is unique when compared to other reptiles but is similar to that of its phylogenetic relatives, the birds. The theca is extensively hypertrophied, but the granulosa never fills the cavity formed following the ovulation of the ovum. The formation of the corpus luteum (CL) is correlated with elevated plasma progesterone concentrations, which...
Authors
L. J. Guillette, A.R. Woodward, Q. You-Xiang, M.C. Cox, J.H. Matter, T. S. Gross
Wind damage effects of Hurricane Andrew on mangrove communities along the southwest coast of Florida, USA Wind damage effects of Hurricane Andrew on mangrove communities along the southwest coast of Florida, USA
On August 24, 1992, Hurricane Andrew downed and defoliated an extensive swath of mangrove trees across the lower Florida peninsula. Permanent field sites were established to assess the extent of forest damage and to monitor the rate and process of forest recovery. Canopy trees suffered the highest mortality particularly for sites within and immediately north of the storm's eyewall. The...
Authors
T.W. Doyle, T. J. Smith, M. B. Robblee
Dicofol and DDT residues in lizard carcasses and bird eggs from Texas, Florida, and California Dicofol and DDT residues in lizard carcasses and bird eggs from Texas, Florida, and California
Dicofol is an organochlorine agricultural pesticide used to control mites. The principal commercial dicofol product is known as Kelthane TM. More than 70% of dicofol product (about 3 million Ib or 1.4 million kg) sold annually in the U.S. is applied in California, Arizona, Texas, and Florida. Florida citrus and California cotton receive more than half the total (Clark 1990). In...
Authors
D.R. Clark, Edward L. Flickinger, Donald H. White, R. L. Hothem, A. A. Belisle