Some fundamentals of geochemistry
D. Kirk Nordstrom
Geoffrey S. Plumlee, M.J. Logsdon, editor(s)
1999, Book chapter, The environmental geochemistry of mineral deposits: Part A processes, methods and health issues
No abstract available. ...
Application of aerial gamma-ray spectrometric and magnetic surveys in geologic mapping: a case study in southern Virginia and northern North Carolina
J. Wright Horton Jr., David L. Daniels
1999, Book chapter, Geology of the Fall Zone Region along to North Carolina-Virginia State Line: guidebook for the 1999 meeting of the Carolina Geological Society
Aerial gamma-ray spectrometric and magnetic survey maps are valuable aids for geologic mapping where rocks are poorly exposed in south-central Virginia and northernmost North Carolina. Broad low areas on the potassium and thorium gamma-ray survey maps distinguish the Carolina, Spring Hope, and Roanoke Rapids terranes from more highly radiogenic areas of the Raleigh...
Recharge to and Discharge from the Edwards Aquifer in the San Antonio Area, Texas, 1998
1999, Report
The Edwards aquifer is the sole source of public water supply for more than 1 million people in the San Antonio area and supplies large quantities of water for agriculture, industry, and the military. The dissolutioned, faulted limestone aquifer is the major source of water for Bexar, Comal, Hays, Medina, and Uvalde Counties. The annual...
Atlantic white cedar plantings in St. Tammany Parish, Louisiana, and the Bogue Chitto National Wildlife Refuge, Mississippi
John W. McCoy, Bobby D. Keeland, James A. Allen
1999, Conference Paper, Proceedings Atlantic white-cedar: Ecology and management symposium
Populations of Atlantic white cedar (Chamaecyparis thyoides (L.) B.S.P.) growing at the extreme western range of the species are in danger of being lost, and information on the ecology of these populations is limited. Seeds and seedlings ("wildlings") were collected near Vancleave, MS. The wildlings were transplanted to bay-head sites...
Chlorofluorocarbons
L.N. Plummer, Eurybiades Busenberg
P. Cook, A. Herczeg, editor(s)
1999, Book chapter, Environmental tracers in subsurface hydrology
No abstract available. ...
Meteoritos en el desierto
Eugene Merle Shoemaker, Jeffrey C. Wynn
1999, Investigación y Ciencia (268) 14-21
Imagínese por un instante en medio del desierto. Anochece por el noroeste. Es un paisaje desolado donde por doquier se extienden vastas dunas móviles de arena grisácea. Ni una roca, ni un alma en 250 kilómetros a la redonda. Pese al ocaso solar, el termómetro señala 50 grados. A su...
Using flood-analysis techniques to estimate dissolved-zinc concentrations
Kenneth J. Leib, Winfield G. Wright, M. Alisa Mast
1999, Book chapter, Tailings and mind waste '99
No abstract available. ...
Predicting soil-water retention and hydraulic conductivity from textural and structural information
John R. Nimmo
1999, Book chapter, Characterization and measurement of the hydraulic properties of unsaturated porous media, part 2
No abstract available. ...
Le jour où le sable s'enflamma
Eugene Merle Shoemaker, Jeffrey C. Wynn
1999, Pour la Science (255) 34-41
No abstract available....
Selenium pollution
Theresa S. Presser
D. Alexander, Rhodes W. Fairbridge, editor(s)
1999, Book chapter, Encyclopedia of environmental science
No abstract available. ...
Transport of heat and gas in soil and at the surface
D.E. Anderson
1999, Book chapter, Unsaturated zone hydrology for scientists and engineers
No abstract available....
Solutions to questions
D.E. Anderson
1999, Book chapter, Instructor's solution manual for unsaturated zone hydrology for scientists and engineers
No abstract available. ...
Ground-water flow paths and traveltime to three small embayments within the Peconic Estuary, eastern Suffolk County, New York
Christopher Schubert
1999, Water-Resources Investigations Report 98-4181
The Peconic Estuary, at the eastern end of Long Island, has been plagued by a recurrent algal bloom that has caused the severe decline of local marine resources. Although the onset, duration, and cessation of the bloom remain unpredictable, ground-water discharge has been shown to affect surface-water quality in the...
Inventory and Assessment of Avifauna and a Monitoring Proposal for Tonto National Monument, Arizona
K.L. Hiett, W. L. Halvorson
1999, Technical Report 62
No abstract available at this time...
Results of the 1999 survey of the reintroduced sea otter population in Washington state
Ronald J. Jameson, Steven J. Jeffries
1999, Report
Fifty-nine sea otters were released off the west coast of the Olympic Peninsula of Washington State during the summers of 1969 and 1970; all had been translocated from Amchitka Island, Alaska. In 1970, 30 otters were released. Surveys to assess the results of this translocation began in 1977. Up to...
GIS database development to analyze fire history in southern Arizona and beyond: an example from Saguaro National Park
P.J. Swantek, W. L. Halvorson, C.R. Schwalbe
1999, Technical Report 61
No abstract available at this time...
Hard times for nesting ducks on Grizzly Island
Joshua T. Ackerman
1999, California Waterfowl 36-37
No abstract available at this time...
Diet of the double-crested cormorant in western Lake Erie
Michael T. Bur, Sandra L. Tinnirello, Charles D. Lovell, Jeff T. Tyson
1999, Conference Paper, Symposium on double-crested cormorants: Population status and management issues in the Midwest
Sport and commercial fishing interest groups are concerned about potential impacts double-crested cormorants (Phalacrocorax auritus) may have on fish species. Our objectives for this study were to determine the diet of the cormorant in western Lake Erie and the diet overlap and competition for resources with piscivorous fish, such as...
Fish losses to double-crested cormorant predation in Eastern Lake Ontario, 1992-97
Robert M. Ross, James H. Johnson
1999, USDA APHIS Technical Bulletin 1879
We examined 4,848 regurgitated digestive pellets of double-crested cormorants (Phalacrocorax auritus) over a 6-year period (1992–97) to estimate annual predation on sport and other fishes in the eastern basin of Lake Ontario. We found more than 51,000 fish of 28 species. Using a model that incorporates annual colony nest counts;...
USGS develops a drainage-based system to track ANS introductions
Pamela L. Fuller
1999, Aquatic Nuisance Species Digest (3) 32-35
The U.S. Geological Survey (USGS) Nonindigenous Aquatic Species (NAS) Program has tracked the distribution of introduced species for more than 20 years. This effort began with foreign fishes in Florida and later expanded to include aquatic nuisance species nationwide. The tracking database contains locational and temporal data for introductions and...
Working group on future trends
Working Group Members: Fair, Geraci (Leader), Goldberg, Jarman, Kucklick (Rapporteur), Krahn, Muir, Norstrom, Phinney, Tanabe, van Leeuwen, York
Thomas J. O'Shea, Randall R. Reeves, Alison Kirk Long, editor(s)
1999, Conference Paper, Marine mammals and persistent ocean contaminants: Proceedings of the Marine Mammal Commission Workshop
This working group did not divide into subgroups, and its report consists of a unified document in a format somewhat different than those of the other working groups. The group considered four major topics: (1) projected "new" contaminants of future concern; (2) future trends with contaminants currently known to be...
Comparison of the capabilities of dugongs and West Indian manatees to masticate seagrasses
Helene Marsh, Cathy A. Beck, Tim Vargo
1999, Marine Mammal Science (15) 250-255
No abstract available....
Fishes in mangrove prop-root habitats of northeastern Florida Bay: Distinct assemblages across an estuarine gradient
J.A. Ley, Carole McIvor, C.L. Montague
1999, Estuarine, Coastal and Shelf Science (48) 701-723
Seasonal changes in freshwater inflow and other environmental conditions may induce changes in density and species composition of mangrove fishes along estuarine gradients. Fishes within mangrove habitats in a subtropical estuary were sampled monthly from May 1989 to May 1990, using block nets with rotenone and visual censuses. At 18...
Effects of cadmium-spiked sediment on cadmium accumulation and bioturbation by nymphs of the burrowing mayfly Hexagenia bilineata
Michelle Bartsch, W. Gregory Cope, Ronald G. Rada
1999, Water, Air, & Soil Pollution (109) 277-292
We assessed accumulation of cadmium (Cd) and bioturbation by nymphs of the burrowing mayfly Hexagenia bilineata as indicators of exposure to Cd-spiked sediment in a 21-d test. Surficial sediments (top 5 cm) from Pool 7 of the Upper Mississippi River were spiked with Cd to concentrations of 3, 7, and...
Freshwater mussels in the Gulf region: Alabama
Charles Lydeard, Jeffrey T. Garner, Paul Hartfeld, James D. Williams
1999, Gulf of Mexico Science (17) 125-134
No abstract available....
