Eric Brunson
Eric is a Biological Science Lab Technician at the Columbia Environmental Research Center.
Science and Products
Filter Total Items: 21
Evaluation of toxicity: Whole-sediment versus overlying-water exposures with amphipod Hyalella azteca
A laboratory study was conducted to evaluate the toxicity of whole-sediment versus overlying-water exposures to the amphipod Hyalella azteca using field-collected sediments. Severe toxic effects (5-63% survival) were observed with amphipods exposed for 10 d in direct contact with sediment. In contrast, amphipods exposed only to overlying water in these sediment exposures did not exhibit any toxic
Authors
C.G. Ingersoll, C.D. Ivey, E.L. Brunson, D.K. Hardesty, N.E. Kemble
Use of sublethal endpoints in sediment toxicity tests with the amphipod Hyalella azteca
Short-term sediment toxicity tests that only measure effects on survival can be used to identify high levels of contamination but may not be able to identify marginally contaminated sediments. The objective of the present study was to develop a method for determining the potential sublethal effects of contaminants associated with sediment on the amphipod Hyalella azteca (e.g., reproduction). Expos
Authors
Chris G. Ingersoll, Eric L. Brunson, F. James Dwyer, Douglas K. Hardesty, Nile E. Kemble
Assessing sediments from Upper Mississippi River navigational pools using a benthic invertebrate community evaluation and the sediment quality triad approach
Benthic invertebrate samples were collected from 23 pools in the Upper Mississippi River (UMR) and from one station in the Saint Croix River (SCR) as part of a study to assess the effects of the extensive flooding of 1993 on sediment contamination in the UMR system. Sediment contaminants of concern included both organic and inorganic compounds. Oligochaetes and chironomids constituted over 80% of
Authors
T.J. Canfield, E.L. Brunson, F.J. Dwyer, C.G. Ingersoll, N.E. Kemble
Assessing the bioaccumulation of contaminants from sediments of the Upper Mississippi River using field-collected oligochaetes and laboratory- exposed Lumbriculus variegatus
Concern with the redistribution of contaminants associated with sediment in the upper Mississippi River (UMR) arose after the flood of 1993. This project is designed to evaluate the status of sediments in the UMR and is one article in a series designed to assess the extent of sediment contamination in navigational pools of the river. Companion articles evaluate sediment toxicity and benthic commun
Authors
E.L. Brunson, T.J. Canfield, F.J. Dwyer, C.G. Ingersoll, N.E. Kemble
Assessing sediment toxicity from navigational pools of the Upper Mississippi River using a 28-day Hyalella azteca test
To assess the extent of sediment contamination in the Upper Mississippi River (UMR) system after the flood of 1993, sediment samples were collected from 24 of the 26 navigational pools in the river and from one site in the Saint Croix River in the summer of 1994. Whole-sediment tests were conducted with the amphipod Hyalella azteca for 28 days measuring the effects on survival, growth, and sexual
Authors
N.E. Kemble, E.L. Brunson, T.J. Canfield, F.J. Dwyer, C.G. Ingersoll
Calculation and evaluation of sediment effect concentrations for the amphipod Hyalella azteca and the midge Chironomus riparius
Procedures are described for calculating and evaluating sediment effect concentrations (SECs) using laboratory data on the toxicity of contaminants associated with field-collected sediment to the amphipod Hyalella azteca and the midge Chironomus riparius. SECs are defined as the concentrations of individual contaminants in sediment below which toxicity is rarely observed and above which toxicity i
Authors
Christopher G. Ingersoll, Pamela S. Haverland, Eric L. Brunson, Timothy J. Canfield, F. James Dwyer, Chris Henke, Nile E. Kemble, David R. Mount, Richard G. Fox
Postembryonic growth and development of Hyalella azteca in laboratory cultures and contaminated sediments
The environmental, biological, and ecological requirements of but a few species used in testing sediments are known and well understood. The present investigation was designed to provide fundamental information on the postembryonic growth and development of Hyalella azteca (Amphipoda) that can be used as sublethal indicators of contaminated sediments, and the influence growth characteristics may h
Authors
M.K. Nelson, Eric L. Brunson
Toxicity and bioaccumulation of sediment-associated contaminants using freshwater invertebrates: A review of methods and applications
This paper reviews recent developments in methods for evaluating the toxicity and bioaccumulation of contaminants associated with freshwater sediments and summarizes example case studies demonstrating the application of these methods. Over the past decade, research has emphasized development of more specific testing procedures for conducting 10-d toxicity tests with the amphipod Hyalella azteca an
Authors
C.G. Ingersoll, G.T. Ankley, D.A. Benoit, E.L. Brunson, G.A. Burton, F.J. Dwyer, R.A. Hoke, P.F. Landrum, T. J. Norberg-King, P. V. Winger
Toxicity of metal-contaminated sediments from the upper Clark Fork River, Montana, to aquatic invertebrates and fish in laboratory exposures
Sediments of the upper Clark Fork River, from the Butte and Anaconda area to Milltown Reservoir (230 km downstream), are contaminated with As, Cd, Cu, Pb, Mn, and Zn primarily from mining activities. The toxicity of pore water from these sediments was determined using Daphnia magna (48-h exposure), rainbow trout (96-h exposure), and Microtox®. However, pore-water data from these exposures were que
Authors
Nile E. Kemble, William G. Brumbaugh, Eric L. Brunson, F. James Dwyer, Christopher G. Ingersoll, Dave P. Monda, Daniel F. Woodward
Science and Products
Filter Total Items: 21
Evaluation of toxicity: Whole-sediment versus overlying-water exposures with amphipod Hyalella azteca
A laboratory study was conducted to evaluate the toxicity of whole-sediment versus overlying-water exposures to the amphipod Hyalella azteca using field-collected sediments. Severe toxic effects (5-63% survival) were observed with amphipods exposed for 10 d in direct contact with sediment. In contrast, amphipods exposed only to overlying water in these sediment exposures did not exhibit any toxic
Authors
C.G. Ingersoll, C.D. Ivey, E.L. Brunson, D.K. Hardesty, N.E. Kemble
Use of sublethal endpoints in sediment toxicity tests with the amphipod Hyalella azteca
Short-term sediment toxicity tests that only measure effects on survival can be used to identify high levels of contamination but may not be able to identify marginally contaminated sediments. The objective of the present study was to develop a method for determining the potential sublethal effects of contaminants associated with sediment on the amphipod Hyalella azteca (e.g., reproduction). Expos
Authors
Chris G. Ingersoll, Eric L. Brunson, F. James Dwyer, Douglas K. Hardesty, Nile E. Kemble
Assessing sediments from Upper Mississippi River navigational pools using a benthic invertebrate community evaluation and the sediment quality triad approach
Benthic invertebrate samples were collected from 23 pools in the Upper Mississippi River (UMR) and from one station in the Saint Croix River (SCR) as part of a study to assess the effects of the extensive flooding of 1993 on sediment contamination in the UMR system. Sediment contaminants of concern included both organic and inorganic compounds. Oligochaetes and chironomids constituted over 80% of
Authors
T.J. Canfield, E.L. Brunson, F.J. Dwyer, C.G. Ingersoll, N.E. Kemble
Assessing the bioaccumulation of contaminants from sediments of the Upper Mississippi River using field-collected oligochaetes and laboratory- exposed Lumbriculus variegatus
Concern with the redistribution of contaminants associated with sediment in the upper Mississippi River (UMR) arose after the flood of 1993. This project is designed to evaluate the status of sediments in the UMR and is one article in a series designed to assess the extent of sediment contamination in navigational pools of the river. Companion articles evaluate sediment toxicity and benthic commun
Authors
E.L. Brunson, T.J. Canfield, F.J. Dwyer, C.G. Ingersoll, N.E. Kemble
Assessing sediment toxicity from navigational pools of the Upper Mississippi River using a 28-day Hyalella azteca test
To assess the extent of sediment contamination in the Upper Mississippi River (UMR) system after the flood of 1993, sediment samples were collected from 24 of the 26 navigational pools in the river and from one site in the Saint Croix River in the summer of 1994. Whole-sediment tests were conducted with the amphipod Hyalella azteca for 28 days measuring the effects on survival, growth, and sexual
Authors
N.E. Kemble, E.L. Brunson, T.J. Canfield, F.J. Dwyer, C.G. Ingersoll
Calculation and evaluation of sediment effect concentrations for the amphipod Hyalella azteca and the midge Chironomus riparius
Procedures are described for calculating and evaluating sediment effect concentrations (SECs) using laboratory data on the toxicity of contaminants associated with field-collected sediment to the amphipod Hyalella azteca and the midge Chironomus riparius. SECs are defined as the concentrations of individual contaminants in sediment below which toxicity is rarely observed and above which toxicity i
Authors
Christopher G. Ingersoll, Pamela S. Haverland, Eric L. Brunson, Timothy J. Canfield, F. James Dwyer, Chris Henke, Nile E. Kemble, David R. Mount, Richard G. Fox
Postembryonic growth and development of Hyalella azteca in laboratory cultures and contaminated sediments
The environmental, biological, and ecological requirements of but a few species used in testing sediments are known and well understood. The present investigation was designed to provide fundamental information on the postembryonic growth and development of Hyalella azteca (Amphipoda) that can be used as sublethal indicators of contaminated sediments, and the influence growth characteristics may h
Authors
M.K. Nelson, Eric L. Brunson
Toxicity and bioaccumulation of sediment-associated contaminants using freshwater invertebrates: A review of methods and applications
This paper reviews recent developments in methods for evaluating the toxicity and bioaccumulation of contaminants associated with freshwater sediments and summarizes example case studies demonstrating the application of these methods. Over the past decade, research has emphasized development of more specific testing procedures for conducting 10-d toxicity tests with the amphipod Hyalella azteca an
Authors
C.G. Ingersoll, G.T. Ankley, D.A. Benoit, E.L. Brunson, G.A. Burton, F.J. Dwyer, R.A. Hoke, P.F. Landrum, T. J. Norberg-King, P. V. Winger
Toxicity of metal-contaminated sediments from the upper Clark Fork River, Montana, to aquatic invertebrates and fish in laboratory exposures
Sediments of the upper Clark Fork River, from the Butte and Anaconda area to Milltown Reservoir (230 km downstream), are contaminated with As, Cd, Cu, Pb, Mn, and Zn primarily from mining activities. The toxicity of pore water from these sediments was determined using Daphnia magna (48-h exposure), rainbow trout (96-h exposure), and Microtox®. However, pore-water data from these exposures were que
Authors
Nile E. Kemble, William G. Brumbaugh, Eric L. Brunson, F. James Dwyer, Christopher G. Ingersoll, Dave P. Monda, Daniel F. Woodward