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Vol. 15, No. 1 – 2018
A bloom of cyanobacteria near the shore of Milford Lake, Kansas

New Method Developed to Quantify Spatial Extent of Cyanobacterial Blooms

This study provides a method for quantifying changes in the spatial extent of cyanobacterial blooms at local and regional scales using remotely sensed data to determine if bloom occurrence and size are increasing or decreasing for inland water resources. ...

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USGS scientists retrieve sampler from a boat

Understanding Associations between Mussel Productivity and Cyanotoxins in Lake Erie

Study findings indicate that cyanobacteria and cyanotoxins were not associated with mussel mortality at the concentrations present in Lake Erie during a recent study (2013-15), but mussel growth was lower at sites with greater microcystin concentrations. ...

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samping flume and rain gage - corn field is in the backgroud

Scientists Examined Native Pollinator Exposure Risk to Neonicotinoids in Native Prairie Strips

Neonicotinoids were not detected in native prairie plants placed next to agricultural fields several years after discontinuation of neonicotinoid seed treatment. In addition, neonicotinoid concentrations were lower or absent in soils and runoff at sites with the native prairie strips. ...

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Scientists analyzing samples for viral pathogens

Occurrence of Avian Influenza Virus in Groundwater—Study Provides Baseline Data and Informs Future Studies

This pilot study provided baseline data on avian influenza virus (AIV) occurrence in groundwater underlying poultry farms and documented the challenges for conducting a pathogen transport study during a disease outbreak. ...

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Colonies of the bacteria Bacillus globigii on a petri dish

Optimized Approaches Coupled with Interactive Mapping Application Provide a Tool to Visualize the Occurrence of Soil Pathogens

Scientists optimized existing methods to collect and identify microorganisms including Bacillus anthracis, a pathogenic microorganism, in 4,800 soil samples across the United States, and developed a geographic information system (GIS)-based application to visualize microorganism occurrence throughout the United States. ...

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Forster's tern (Sterna forsteri) while hunting in flight

Body Symmetry in Forster's Terns Related to Mercury Exposure

Body symmetry of Forster's terns (Sterna forsteri) in San Francisco Bay was related to blood and feather mercury concentrations. Body asymmetry can affect a bird's fitness by reducing flight efficiency, thus increasing energetic costs (especially during migration) and interrupting normal feeding and breeding behaviors. ...

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Cedar Creek in Congaree National Park, SC, showing old growth bottomland hardwood forest

Sources of Contaminants to Congaree National Park—USGS and National Park Service Working Together

A National Park Service (NPS) and U.S. Geological Survey (USGS) study determined the concentrations, potential for degradation, and potential for aquatic and terrestrial animal exposure to organic contaminants in water and sediment within the flood-plain/aquatic environments of Congaree National Park which is located downstream from urban and agricultural areas. ...

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Scientist uses a syringe to withdraw water from a core

Cyclical Mobilization and Attenuation of Naturally Occurring Arsenic in an Underground Petroleum Plume

Scientists found that naturally occurring arsenic in aquifer sediments was mobilized into groundwater and attenuated through reattachment to sediments within an underground petroleum plume. Understanding these patterns identifies anthropogenic factors that affect arsenic presence and magnitude in groundwater. ...

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A scientist working in a laboratory

Comparison of Predicted and Measured Pharmaceutical Concentrations in Rivers

New study evaluated if predicted environmental concentrations (PECs) of pharmaceuticals (based on pharmaceutical usage data, degree of metabolism in humans, removal in wastewater treatment plants (WWTPs), and environmental dilution), reflect actual measured environmental concentrations (MECs) in two rivers of different sizes and demographics. ...

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A small stream flows through cornfields

Estimated Toxicity to Aquatic Organisms in Midwestern Streams Driven by Relatively Few of the 227 Pesticides Analyzed

USGS scientists measured and estimated potential acute and chronic toxicity for 227 pesticides in agricultural and urban streams in Midwestern United States. Numerous pesticides were detected at low levels. Atrazine, acetochlor, metolachlor, imidacloprid, fipronil, selected organophosphate insecticides, and carbendazim were determined to be major contributors to toxicity that was estimated in over half of the streams studied. ...

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Michael J. Focazio, Editor
Kathy E. Lee, Managing Editor
Victoria G. Christensen, Assistant Editor
David W. Morganwalp, Coordinating Editor
Stephanee R. Walker, Copy Editor

01/17/2018

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Page Last Modified: 17-Jan-2018 @ 08:33:57 AM EST