Kathy Echols, PhD
Dr. Kathy Echols is a Research Chemist at the Columbia Environmental Research Center.
She leads the Environmental Forensics Group in the Environmental Chemistry Branch at the center. Her expertise includes persistent organic pollutant analysis, especially in tissue matrices; also does research in algal toxin analysis and emerging contaminant analysis.
Professional Experience
2004-present Research Chemist, Group Leader, Environmental Forensics, Environmental Chemistry Branch, CERC, USGS, Columbia, Missouri.
2000-2004 Research Chemist, Organic Section, Environmental Chemistry Branch, CERC, USGS.
1996-2000 Research Chemist, Organic/Biochemistry Section, USGS, MSC and CERC.
1997-1998 Adjunct Professor, Chemistry Department, University of Missouri-Columbia.
1997-1998 Adjunct Professor, Chemistry Department, University of Missouri-Columbia.
1993-1996 Research Chemist, Leader of Chromatography Section, National Biological Service, CERC
1992-1993 Research Chemist, Leader of Chromatography Section, U.S. Fish and Wildlife Service, National Fisheries Contaminant Research Center, Columbia, MO.
Education and Certifications
Ph.D. Analytical Chemistry, University of Missouri, 1992
B.S. Chemistry, College of William and Mary, 1987
Science and Products
Metals in sediments and fish from Sea Lots and Point Lisas harbors, Trinidad and Tobago
Spatial and temporal dynamics of cyanotoxins and their relation to other water quality variables in Upper Klamath Lake, Oregon, 2007-09
Patterns of metal composition and biological condition and their association in male common carp across an environmental contaminant gradient in Lake Mead National Recreation Area, Nevada and Arizona, USA
Polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in harbor sediments from Sea Lots, Port-of-Spain, Trinidad and Tobago
Suspended sediment and organic contaminants in the San Lorenzo River, California, water years 2009-2010
Evaluation of environmental contaminants and elements in bigheaded carps of the Missouri River at Easley, Missouri, USA
Water quality and trophic status of Fort Cobb Reservoir, southwestern Oklahoma, 2016: Chapter 8 in Assessment of conservation practices in the Fort Cobb Reservoir watershed, southwestern Oklahoma
Polychlorinated dibenzo-p-dioxin (PCDDs) and polychlorinated dibenzofurans (PCDFs) in harbor sediments from Sea Lots, Port-of-Spain, Trinidad and Tobago
Accumulation of environmental contaminants in wood duck (Aix sponsa) eggs, with emphasis on polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans
Chemical contaminants, health indicators, and reproductive biomarker responses in fish from rivers in the Southeastern United States
Distribution of pesticides, PAHs, PCBs, and bioavailable metals in depositional sediments of the lower Missouri River, USA
Biomonitoring of Environmental Status and Trends (BEST) Program: Environmental contaminants, health indicators, and reproductive biomarkers in fish from the Mobile, Apalachicola-Chattahoochee-Flint, Savannah, and Pee Dee River Basins
Science and Products
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Filter Total Items: 41
Metals in sediments and fish from Sea Lots and Point Lisas harbors, Trinidad and Tobago
Concentrations of heavy metals were determined in nearshore marine sediments and fish tissue from Sea Lots area on the west coast, at Caroni Lagoon National Park, and in the Point Lisas harbor, Trinidad. The most dominant metals found in sediments were Al, Fe and Zn with mean concentrations highest at Sea Lots (Al-39420 μg/g; Fe-45640 μg/g; Zn-245 μg/g), when compared to sediments from Point LisasAuthorsAzad Mohammed, Thomas May, Kathy Echols, Mike Walther, Anton Manoo, Dexter Maraj, John Agard, Carl OrazioSpatial and temporal dynamics of cyanotoxins and their relation to other water quality variables in Upper Klamath Lake, Oregon, 2007-09
Phytoplankton blooms dominated by cyanobacteria that occur annually in hypereutrophic Upper Klamath Lake, Oregon, produce microcystins at concentrations that may contribute to the decline in populations of endangered Lost River (Deltistes luxatus) and shortnose (Chasmistes brevirostris) suckers. During 2007–09, water samples were collected from Upper Klamath Lake to determine the presence and concAuthorsSara L. Caldwell Eldridge, Tamara M. Wood, Kathy R. EcholsPatterns of metal composition and biological condition and their association in male common carp across an environmental contaminant gradient in Lake Mead National Recreation Area, Nevada and Arizona, USA
There is a contaminant gradient in Lake Mead National Recreation Area (LMNRA) that is partly driven by municipal and industrial runoff and wastewater inputs via Las Vegas Wash (LVW). Adult male common carp (Cyprinus carpio; 10 fish/site) were collected from LVW, Las Vegas Bay (receiving LVW flow), Overton Arm (OA, upstream reference), and Willow Beach (WB, downstream) in March 2008. Discriminant fAuthorsReynaldo Patiño, Michael R. Rosen, E.L. Orsak, Steven L. Goodbred, Thomas W. May, David A. Alvarez, Kathy R. Echols, Carla M. Wieser, Shane Ruessler, L. TorresPolychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in harbor sediments from Sea Lots, Port-of-Spain, Trinidad and Tobago
Concentrations of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were determined in nearshore marine surficial sediments from three locations in Trinidad. Sediments were sampled at Sea Lots on the west coast, in south Port-of-Spain Harbor, south of Sea Lots at Caroni Lagoon National Park, and on Trinidad's east coast at Manzanilla. Total PCB concentrations in Sea Lots sedimeAuthorsAzad Mohammed, Paul Peterman, Kathy Echols, Kevin Feltz, George Tegerdine, Anton Manoo, Dexter Maraj, John Agard, Carl OrazioSuspended sediment and organic contaminants in the San Lorenzo River, California, water years 2009-2010
This report presents analyses of suspended sediment and organic contaminants measured during a two-year study of the San Lorenzo River, central California, which discharges into the Pacific Ocean within the Monterey Bay National Marine Sanctuary. Most suspended-sediment transport occurred during flooding caused by winter storms; 55 percent of the sediment load was transported by the river during aAuthorsAmy E. Draut, Christopher H. Conaway, Kathy R. Echols, Curt D. Storlazzi, Andrew RitchieEvaluation of environmental contaminants and elements in bigheaded carps of the Missouri River at Easley, Missouri, USA
No abstract available.AuthorsCarl E. Orazio, Duane Chapman, Thomas W. May, John C. Meadows, Michael J. Walther, Kathy R. Echols, Joseph E. Deters, Ellen S. DierenfeldWater quality and trophic status of Fort Cobb Reservoir, southwestern Oklahoma, 2016: Chapter 8 in Assessment of conservation practices in the Fort Cobb Reservoir watershed, southwestern Oklahoma
Eutrophication of reservoirs frequently occurs because of excessive nutrient inputs caused by anthropogenic activities, including row-crop agriculture. The trophic status of Fort Cobb Reservoir, Oklahoma, was assessed in April, July, and September 2006. The Fort Cobb Reservoir was highly eutrophic, with the greatest concentrations of nutrients and chlorophyll-a being measured in the upper reachesAuthorsJames F. Fairchild, Ann L. Allert, Kathy R. EcholsPolychlorinated dibenzo-p-dioxin (PCDDs) and polychlorinated dibenzofurans (PCDFs) in harbor sediments from Sea Lots, Port-of-Spain, Trinidad and Tobago
[No abstract available]AuthorsA. Mohammed, C. Orazio, P. Peterman, K. Echols, K. Feltz, A. Manoo, D. Maraj, J. AgardAccumulation of environmental contaminants in wood duck (Aix sponsa) eggs, with emphasis on polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans
We measured polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), polychlorinated biphenyls (PCBs), organochlorine pesticides, and mercury in wood duck (Aix sponsa) eggs collected near a North Carolina (USA) bleached kraft paper mill. Samples were taken a decade after the mill stopped using molecular chlorine. Using avian toxic equivalency factors, 2,3,7,8-tetrachlorodiAuthorsT.P. Augspurger, K. R. Echols, P.H. Peterman, T.W. May, C.E. Orazio, D. E. Tillitt, R.T. Di GiulioChemical contaminants, health indicators, and reproductive biomarker responses in fish from rivers in the Southeastern United States
Largemouth bass (Micropterus salmoides) and common carp (Cyprinus carpio) were collected from 13 sites located in the Mobile (MRB), Apalachicola–Flint–Chattahoochee (ARB), Savannah (SRB), and Pee Dee (PRB) River Basins to document spatial trends in accumulative chemical contaminants, health indicators, and reproductive biomarkers. Organochlorine residues, 2,3,7,8-tetrachlorodibenzo-p-dioxin-like aAuthorsJ.E. Hinck, V. S. Blazer, N. D. Denslow, K. R. Echols, R.W. Gale, C. Wieser, T.W. May, M. Ellersieck, J.J. Coyle, D. E. TillittDistribution of pesticides, PAHs, PCBs, and bioavailable metals in depositional sediments of the lower Missouri River, USA
The lower Missouri River was studied to determine the distribution of selected persistent organic pollutants and bioavailable metals in depositional sediments. Nineteen sites between Omaha, Nebraska and Jefferson City, Missouri were sampled. This stretch of the river receives point-source and non-point-source inputs from industrial, urban, and agricultural activities. As part of an ecological asseAuthorsK. R. Echols, W. G. Brumbaugh, C.E. Orazio, T.W. May, B.C. Poulton, P.H. PetermanBiomonitoring of Environmental Status and Trends (BEST) Program: Environmental contaminants, health indicators, and reproductive biomarkers in fish from the Mobile, Apalachicola-Chattahoochee-Flint, Savannah, and Pee Dee River Basins
Largemouth bass (Micropterus salmoides) and common carp (Cyprinus carpio) were collected from 13 sites in 4 river basins in the southeastern United States to document spatial trends in accumulative contaminants, health indicators, and reproductive biomarkers. Organochlorine residues, 2,3,7,8- tetrachlorodibenzo-p-dioxin-like activity (TCDD-EQ), and elemental contaminants were measured in compositeAuthorsJo Ellen Hinck, Vicki Blazer, Nancy D. Denslow, Kathy R. Echols, Robert W. Gale, Tom W. May, Rachael Claunch, Carla Wieser, Patrick J. Anderson, James J. Coyle, Timothy S. Gross, Donald E. Tillitt