Karen R Murray, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 38
Environmental settings of streams sampled for mercury in New York and South Carolina, 2005-09 Environmental settings of streams sampled for mercury in New York and South Carolina, 2005-09
This report summarizes the environmental settings of streams in New York and South Carolina, where the U.S. Geological Survey completed detailed investigations during 2005-09 into factors contributing to mercury bioaccumulation in top-predator fish and other stream organisms. Descriptions of location, land use/land cover, climate, precipitation, atmospheric deposition, hydrology, water...
Authors
Barbara C. Scudder Eikenberry, Karen Riva-Murray, Martyn J. Smith, Paul M. Bradley, Daniel T. Button, Jimmy M. Clark, Douglas A. Burns, Celeste A. Journey
Composition, distribution, and potential toxicity of organochlorine mixtures in bed sediments of streams Composition, distribution, and potential toxicity of organochlorine mixtures in bed sediments of streams
Mixtures of organochlorine compounds have the potential for additive or interactive toxicity to organisms exposed in the stream. This study uses a variety of methods to identify mixtures and a modified concentration-addition approach to estimate their potential toxicity at 845 stream sites across the United States sampled between 1992 and 2001 for organochlorine pesticides and...
Authors
Patrick J. Phillips, Lisa H. Nowell, Robert J. Gilliom, Naomi Nakagaki, Karen Riva-Murray, Carolyn VanAlstyne
Landscape characteristics affecting streams in urbanizing regions of the Delaware River Basin (New Jersey, New York, and Pennsylvania, U.S.) Landscape characteristics affecting streams in urbanizing regions of the Delaware River Basin (New Jersey, New York, and Pennsylvania, U.S.)
Widespread and increasing urbanization has resulted in the need to assess, monitor, and understand its effects on stream water quality. Identifying relations between stream ecological condition and urban intensity indicators such as impervious surface provides important, but insufficient information to effectively address planning and management needs in such areas. In this study we...
Authors
K. Riva-Murray, R. Riemann, P. Murdoch, J.M. Fischer, R. Brightbill
Changes in stream chemistry and biology in response to reduced levels of acid deposition during 1987-2003 in the Neversink River Basin, Catskill Mountains Changes in stream chemistry and biology in response to reduced levels of acid deposition during 1987-2003 in the Neversink River Basin, Catskill Mountains
Atmospheric acid deposition has decreased in the northeastern United States since the 1970s, resulting in modest increases in pH, acid-neutralizing capacity (ANC), and decreases in inorganic monomeric aluminum (AlIM) concentrations since stream chemistry monitoring began in the 1980s in the acid-sensitive upper Neversink River basin in the Catskill Mountains of New York. Stream pH has...
Authors
Douglas A. Burns, K. Riva-Murray, R.W. Bode, S. Passy
Organic Compounds and Trace Elements in Fish Tissue and Bed Sediment in the Delaware River Basin, New Jersey, Pennsylvania, New York, and Delaware, 1998-2000 Organic Compounds and Trace Elements in Fish Tissue and Bed Sediment in the Delaware River Basin, New Jersey, Pennsylvania, New York, and Delaware, 1998-2000
As part of the National Water-Quality Assessment (NAWQA) program activities in the Delaware River Basin (DELR), samples of fish tissue from 21 sites and samples of bed sediment from 35 sites were analyzed for a suite of organic compounds and trace elements. The sampling sites, within subbasins ranging in size from 11 to 600 square miles, were selected to represent 5 main land-use...
Authors
Kristin M. Romanok, Jeffrey M. Fischer, Karen Riva-Murray, Robin Brightbill, Michael Bilger
A checklist of the aquatic invertebrates of the Delaware River Basin, 1990-2000 A checklist of the aquatic invertebrates of the Delaware River Basin, 1990-2000
This paper details a compilation of aquatic-invertebrate taxa collected at 1,080 sites as part of 13 surface-water-quality studies completed by selected Federal, state, and local environmental agencies during 1990-2000, within the 32,893-km2 area of the Delaware River Basin. This checklist is intended to be a 'working list' of aquatic invertebrates that can be applied successfully to the
Authors
Michael D. Bilger, Karen Riva-Murray, Gretchen L. Wall
Science and Products
Filter Total Items: 38
Environmental settings of streams sampled for mercury in New York and South Carolina, 2005-09 Environmental settings of streams sampled for mercury in New York and South Carolina, 2005-09
This report summarizes the environmental settings of streams in New York and South Carolina, where the U.S. Geological Survey completed detailed investigations during 2005-09 into factors contributing to mercury bioaccumulation in top-predator fish and other stream organisms. Descriptions of location, land use/land cover, climate, precipitation, atmospheric deposition, hydrology, water...
Authors
Barbara C. Scudder Eikenberry, Karen Riva-Murray, Martyn J. Smith, Paul M. Bradley, Daniel T. Button, Jimmy M. Clark, Douglas A. Burns, Celeste A. Journey
Composition, distribution, and potential toxicity of organochlorine mixtures in bed sediments of streams Composition, distribution, and potential toxicity of organochlorine mixtures in bed sediments of streams
Mixtures of organochlorine compounds have the potential for additive or interactive toxicity to organisms exposed in the stream. This study uses a variety of methods to identify mixtures and a modified concentration-addition approach to estimate their potential toxicity at 845 stream sites across the United States sampled between 1992 and 2001 for organochlorine pesticides and...
Authors
Patrick J. Phillips, Lisa H. Nowell, Robert J. Gilliom, Naomi Nakagaki, Karen Riva-Murray, Carolyn VanAlstyne
Landscape characteristics affecting streams in urbanizing regions of the Delaware River Basin (New Jersey, New York, and Pennsylvania, U.S.) Landscape characteristics affecting streams in urbanizing regions of the Delaware River Basin (New Jersey, New York, and Pennsylvania, U.S.)
Widespread and increasing urbanization has resulted in the need to assess, monitor, and understand its effects on stream water quality. Identifying relations between stream ecological condition and urban intensity indicators such as impervious surface provides important, but insufficient information to effectively address planning and management needs in such areas. In this study we...
Authors
K. Riva-Murray, R. Riemann, P. Murdoch, J.M. Fischer, R. Brightbill
Changes in stream chemistry and biology in response to reduced levels of acid deposition during 1987-2003 in the Neversink River Basin, Catskill Mountains Changes in stream chemistry and biology in response to reduced levels of acid deposition during 1987-2003 in the Neversink River Basin, Catskill Mountains
Atmospheric acid deposition has decreased in the northeastern United States since the 1970s, resulting in modest increases in pH, acid-neutralizing capacity (ANC), and decreases in inorganic monomeric aluminum (AlIM) concentrations since stream chemistry monitoring began in the 1980s in the acid-sensitive upper Neversink River basin in the Catskill Mountains of New York. Stream pH has...
Authors
Douglas A. Burns, K. Riva-Murray, R.W. Bode, S. Passy
Organic Compounds and Trace Elements in Fish Tissue and Bed Sediment in the Delaware River Basin, New Jersey, Pennsylvania, New York, and Delaware, 1998-2000 Organic Compounds and Trace Elements in Fish Tissue and Bed Sediment in the Delaware River Basin, New Jersey, Pennsylvania, New York, and Delaware, 1998-2000
As part of the National Water-Quality Assessment (NAWQA) program activities in the Delaware River Basin (DELR), samples of fish tissue from 21 sites and samples of bed sediment from 35 sites were analyzed for a suite of organic compounds and trace elements. The sampling sites, within subbasins ranging in size from 11 to 600 square miles, were selected to represent 5 main land-use...
Authors
Kristin M. Romanok, Jeffrey M. Fischer, Karen Riva-Murray, Robin Brightbill, Michael Bilger
A checklist of the aquatic invertebrates of the Delaware River Basin, 1990-2000 A checklist of the aquatic invertebrates of the Delaware River Basin, 1990-2000
This paper details a compilation of aquatic-invertebrate taxa collected at 1,080 sites as part of 13 surface-water-quality studies completed by selected Federal, state, and local environmental agencies during 1990-2000, within the 32,893-km2 area of the Delaware River Basin. This checklist is intended to be a 'working list' of aquatic invertebrates that can be applied successfully to the
Authors
Michael D. Bilger, Karen Riva-Murray, Gretchen L. Wall