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22 Titles Match Your Query
Showing 1 through 22 of 22
1. An expanded map of vegetation communities at Big Muddy National Fish and Wildlife Refuge [USGS_CERC_BigMuddyNFWR_VegMap]
In 2012, a map of vegetation communities on Big Muddy National Fish and Wildlife Refuge was expanded based on interpretation of aerial photographs and field data. National Agricultural Imagery Program ...


2. A Geographic Information System Database for Environmental Contaminants in the Rio Grande/Rio Bravo Basin [USGS_CERC_RioGrand_Contaminants]
ABSTRACT: The assessment of contaminant stressors on biota of the Rio Grande/Rio Bravo resulted from an effort of the Biomonitoring for Environmental Status and Trends (BEST) program, to implement ...


3. A Passive Integrative Sampler for Mercury Vapor in Air and Neutral Mercury Species in Water. [usgsbrdcerc_mercurysampler]
A passive integrative mercury sampler (PIMS) based on a sealed polymeric membrane was effective for the collection and preconcentration of Hg0. Because the Hg is both oxidized and stabilized in the ...


4. An Assessment of Sediments from the Upper Mississippi River [usgs_brd_cerc_d_upper_Miss]
The U.S. Geological Survey has been monitoring the Upper Mississippi River (UMR) since 1987 to document the fate and transport of contaminants associated with sediments. The UMR is that part of the ...


5. Application of Enzyme-Linked Immunosorbent Assay for Measurement of Polychlorinated Biphenyls from Hydrophobic Solutions. [usgsbrdcerc_immunosorbentassay]
The objectives of this work were 1) to study the recovery and homogenity of polychlorinated biphenyls (PCBs) in solution prepared for ELISA by direct dilution of isooctane solutions; 2) to evaluate ...


6. Assessing Contaminant Sensitivity of Endangered and Threatened Species Toxicant Classes. [usgs_brd_cerc_d_contamsens]
Under the Federal Insecticide, Fungicide and Rodenticide Act, the Toxic Substances Control Act and the Clean Water Act, the U.S. Environmental Protection Agency is charged with determining if the ...


7. Comparative Sensitivity of Selenastrum capricornutum and Lemna minor to Sixteen Herbicides [usgs_brd_cerc_d_algae]
Aquatic plant toxicity tests are frequently conducted in environmental risk assessments to determine the potential impacts of contaminants on primary producers. An examination of published plant toxicity ...


8. Comparative Sensitivty of Five Species of Macrophytes and Six Species of Algae to Atrazine, Metribuzin, Alachlor, and Metolachlor [usgs_brd_cerc_d_macro_algae]
This data relates to the relative sensitivity of five species of aquatic macrophytes and six species of algae to four commonly used herbicides (atrazine, metribuzin, alachlor, and metoachlor). Toxicity ...


9. Comparison of the Uptake of Dioxin-Like Compounds by Caged Channel Catfish and Semipermeable Membrane Devices in the Saginaw River Michigan [usgsbrdcerc_dioxincompounds]
Elevated concentrations of planar, halogenated hydrocarbons have been linked to reproductive problems in a variety of fish-eating birds and mammals in the Great Lakes and in particular Saginaw Bay. ...


10. Determination of Bioavailable Contaminants in the Lower Missouri River Following the Flood of 1993. [usgs_brd_cerc_d_postflood]
The semipermeable membrane device (SPMD) technology was employed to determine the presence of bioavailable organochlorine pesticides (OCs), polychlorinated biphenyls (PCBs), and polyaromatic hydrocarbons ...


11. Determination of Uptake Kinetics (Sampling Rates) by Lipid-Containing Semipermeable Membrane Devices (SPMDs) for Polycyclic Aromatic Hydrocarbons in water. [usgsbrdcerc_samplingrates]
The use of lipid-containing semipermeable membrane devices (SPMDs) is becoming commonplace, but very little sampling rate data is available for the estimation of ambient contaminant concentrations ...


12. Determination of Waterborne Bioavailable Organochlorine Pesticide Residues in the Lower Missouri River [usgs_brd_cerc_d_preflood]
The semipermeable membrane device (SPMD) technology, was used to determine the presence of bioavailable organochlorine pesticides in the water of the main stem Missouri River. SPMDs were deployed ...


13. Dietary Exposure of Mink to Carp from Saginaw Bay [usgsbrdcerc_mink]
In this study, mink (Mustela vison) were exposed to various amounts of carp (Cyprinus carpio) collected from Saginaw Bay, Lake Huron, MI, and the reproductive effects were observed. In this portion ...


14. Effects of Spatial and Temporal Variation of Acid-Volatile Sulfide on the Bioavailability of Copper and Zinc in Freshwater Sediments [usgs_brd_cerc_d_sulfides]
Variation in concentrations of acid-volatile sulfide (AVS) in sediments from the upper Clark Fork River of Montana was associated with differences in bioaccumulation of Cu and Zn and growth of larvae ...


15. Embryotoxicity of Great Lakes Lake Trout Extracts to Developing Rainbow Trout. [usgsbrdcerc_GreatLakeslaketrout]
Planar halogenated hydrocarbons (PHHs), such as polychlorinated dibenzo-p-dioxins, dibenzofurans, and biphenyls are present in aquatic systems, and are known to produce adverse effects in fish. This ...


16. Persistent Environmental Contaminants in United States Fish and Wildlife [usgsbrdcerc_perscontam]
Contaminant concentrations in freshwater fish and birds were periodically measured. Fish were selected for monitoring aquatic ecosystems because of their tendency to accumulate pesticides and other ...


17. Potential Effects of Interspecific Competition on Neosho Madtom (Noturus placidus) Populations [usgs_brd_cerc_d_neoshomadtom]
Previous research on the distribution of Neosho madtoms, which are Federally-listed as threatened, indicated a positive relationship between density of Neosho madtoms and cumulative density of other ...


18. Tolerance of Freshwater Test Organisms to Formulated Sediments [usgs_brd_cerc_d_freshwater]
A method is described for preparing formulated sediments for use in toxicity testing. Ingredients used to prepare formulated sediments included commercially available silt, clay, sand, humic acid, ...


19. Tolerance of an Albino Fish to Ultraviolet-B Radiation [usgs_brd_cerc_d_albino_fish]
Albino and pigmented medaka Oryzias latipes was exposed to simulated solar ultraviolet-B (UVB) radiation to determine if albino medaka were less tolerant of UVB radiation than medaka pigmented with ...


20. Toxicity of Sediment Collected Upriver and Downriver of Major Cities along the Lower Mississippi River. [usgs_brd_cerc_d_lower_Miss]
The Lower Mississippi River contributes significantly to the biodiversity and ecological stability of the alluvial valley, but agricultural, industrial and municipal developments have historically ...


21. Toxicity of Water from Three South Carolina Rivers to Larval Striped Bass [BRD_TOXICITY]
The toxicity of water from three rivers in the Santee-Cooper drainage of South Carolina was evaluated in a series of on-site studies with larval striped bass Morone saxatiliss. Mortality and swimming ...


22. Use of the Semipermeable Membrane Device as an in Situ Sampler of Waterborne Bioavailable PCDD and PCDF residues at Sub-Parts-per Quadrillion Concentrations. [usgsbrdcerc_spmdpcdd]
Semipermeable membrane devices (SPMDs) were used to passively sample aqueous polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in Bayou Meto, Arkansas. The two sites ...


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