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Kathy Echols, PhD (Former Employee)

Science and Products

Microplastics sampling on Lake Mead

How are Endocrine-Disrupting Compounds Moving Through the Food Web in Lake Mead National Recreation Area?

Water quality in the Lake Mead National Recreation Area (LAKE), particularly Las Vegas Bay, is affected by water coming from the Las Vegas Wash, an urban perennial stream whose water is comprised of treated wastewater and urban runoff coming from the Las Vegas metropolitan area. Common carp collected from Las Vegas Wash and Las Vegas Bay and largemouth bass collected from Las Vegas Bay have...
By
Nevada Water Science Center
How are Endocrine-Disrupting Compounds Moving Through the Food Web in Lake Mead National Recreation Area?

How are Endocrine-Disrupting Compounds Moving Through the Food Web in Lake Mead National Recreation Area?

Water quality in the Lake Mead National Recreation Area (LAKE), particularly Las Vegas Bay, is affected by water coming from the Las Vegas Wash, an urban perennial stream whose water is comprised of treated wastewater and urban runoff coming from the Las Vegas metropolitan area. Common carp collected from Las Vegas Wash and Las Vegas Bay and largemouth bass collected from Las Vegas Bay have...
Learn More

Contaminants measured in multiple environmental media in the Lake Mead National Recreation Area NV/AZ, USA in 2010 Contaminants measured in multiple environmental media in the Lake Mead National Recreation Area NV/AZ, USA in 2010

Concentrations of a wide variety of environmental organic contaminants were measured in surface waters of the Lake Mead National Recreation Area (Nevada and Arizona) in 2010 to provide a measure of exposure to resident fish species. These contaminants were sampled using the semipermeable membrane device (SPMD) and the polar organic chemical integrative sampler (POCIS) which allow for the
By
Columbia Environmental Research Center

Organochlorine chemicals in northern cardinal eggs from suburban Washington, DC USA Organochlorine chemicals in northern cardinal eggs from suburban Washington, DC USA

Analysis of organochlorine pesticides and polychlorinated biphenyls (PCBs) in northern cardinal eggs from six neighborhoods near Washington, DC
By
Columbia Environmental Research Center

Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area (1999-2006) Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area (1999-2006)

Lake Mead National Recreational Area (LMNRA) serves as critical habitat for several federally listed species and supplies water for municipal, domestic, and agricultural use in the Southwestern U.S. Contaminant sources and concentrations vary among sub-basins within LMNRA. To investigate whether environmental contaminant exposure is associated with alterations in male common carp...
By
Wetland and Aquatic Research Center

Baseline aquatic contamination and endocrine status in a resident fish of Biscayne National Park Baseline aquatic contamination and endocrine status in a resident fish of Biscayne National Park

Surface water, sediment, and fish from Biscayne Bay, coastal wetlands adjacent to Biscayne Bay, and canals discharging into Biscayne Bay were sampled for determination of baseline contamination in Biscayne National Park. The number of contaminants detected in canal waters was greater during the wet season relative to the dry season, a relation not evident in Biscayne Bay or wetland...
By
Wetland and Aquatic Research Center
Filter Total Items: 42

Fish health altered by contaminants and low water temperatures compounded by prolonged regional drought in the Lower Colorado River Basin, USA Fish health altered by contaminants and low water temperatures compounded by prolonged regional drought in the Lower Colorado River Basin, USA

The goal of this study was to assess health of male Common Carp (carp, Cyprinus carpio) at four sites with a wide range in environmental organic contaminant (EOC) concentrations and water temperatures in Lake Mead National Recreation Area NV/AZ, US, and the potential influence of regional drought. Histological and reproductive biomarkers were measured in 17–30 carp at four sites and 130...
Authors
Steven L Goodbred, Reynaldo Patino, David A. Alvarez, Darren Johnson, Deena Hannoun, Kathy R. Echols, Jill Jenkins
By
Ecosystems Mission Area, Wetland and Aquatic Research Center , Colorado River Basin: Actionable and Strategic Integrated Science and Technology, Drought

Movement of synthetic organic compounds in the food web after the introduction of invasive quagga mussels (Dreissena bugensis) in Lake Mead, Nevada and Arizona, USA Movement of synthetic organic compounds in the food web after the introduction of invasive quagga mussels (Dreissena bugensis) in Lake Mead, Nevada and Arizona, USA

Introductions of dreissenid mussels in North America have been a significant concern over the last few decades. This study assessed the distribution of synthetic organic compounds (SOCs) in the food web of Lake Mead, Nevada/Arizona, USA and how this distribution was influenced by the introduction of invasive quagga mussels. A clear spatial gradient of SOC concentrations in water was...
Authors
Steven L. Goodbred, Michael R. Rosen, Reynaldo Patino, David A. Alvarez, Kathy R. Echols, Kerensa King, John Umek
By
Water Resources Mission Area, Ecosystems Mission Area, Cooperative Research Units, California Water Science Center, Columbia Environmental Research Center

Effects of microcystin-LR on juvenile Lost River suckers (Deltistes luxatus) during feeding trials, Upper Klamath Lake, Oregon, 2014−16 Effects of microcystin-LR on juvenile Lost River suckers (Deltistes luxatus) during feeding trials, Upper Klamath Lake, Oregon, 2014−16

Executive Summary Historically, populations of Lost River suckers (Deltistes luxatus) of the Upper Klamath Basin were so numerous that they were commercially harvested; however, declining numbers throughout the 20th century led to the listing of the species under the United States Endangered Species Act in 1988. Habitat destruction, poor water quality, competition with (and predation by)...
Authors
Barbara A. Martin, Kathy R. Echols, Diane G. Elliott, Kevin Feltz, Carla M. Conway, Summer M. Burdick
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Columbia Environmental Research Center, Western Fisheries Research Center, Fish Health Program (FHP), Klamath Falls Field Station (KFFS)

Organochlorine chemical residues in Northern Cardinal (Cardinalis cardinalis) eggs from Greater Washington, DC USA Organochlorine chemical residues in Northern Cardinal (Cardinalis cardinalis) eggs from Greater Washington, DC USA

Northern Cardinal eggs from six neighborhoods near Washington DC were analyzed for organochlorine pesticides and PCBs. All compounds were detected more frequently and at higher concentrations in more heavily urbanized neighborhoods. DDT (mostly as p,pʹ-DDE) was detected in all neighborhoods. p,pʹ-DDT was typically 0.5‒16 ng/g (ww) in most suburban neighborhoods but was not detected (
Authors
Christopher J. Schmitt, Kathy R. Echols, Paul Peterman, Carl Orazio, Christiana Grimm, Shirlee Tan, Nora E. Diggs, Peter P. Marra
By
Ecosystems Mission Area, Columbia Environmental Research Center

Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area

Lake Mead National Recreational Area (LMNRA) serves as critical habitat for several federally listed species and supplies water for municipal, domestic, and agricultural use in the Southwestern U.S. Contaminant sources and concentrations vary among the sub-basins within LMNRA. To investigate whether exposure to environmental contaminants is associated with alterations in male common carp...
Authors
Jill A. Jenkins, Michael R. Rosen, Rassa O. Dale, Kathy R. Echols, Leticia Torres, Carla M. Wieser, Constance A. Kersten, S. Goodbred
By
Ecosystems Mission Area, Columbia Environmental Research Center, Wetland and Aquatic Research Center

Baseline aquatic contamination and endocrine status in a resident fish of Biscayne National Park Baseline aquatic contamination and endocrine status in a resident fish of Biscayne National Park

Surface water, sediment, and fish from Biscayne Bay, coastal wetlands adjacent to the Bay, and canals discharging into the Bay were sampled for determination of baseline contamination in Biscayne National Park. While the number of contaminants detected in canal waters was greater during the wet season than the dry season, no seasonal difference was evident for Biscayne Bay or coastal...
Authors
Timothy A. Bargar, Kevin R.T. Whelan, David Alvarez, Kathy R. Echols, Paul H. Peterman
By
Ecosystems Mission Area, Wetland and Aquatic Research Center , Columbia Environmental Research Center

Science and Products

Microplastics sampling on Lake Mead

How are Endocrine-Disrupting Compounds Moving Through the Food Web in Lake Mead National Recreation Area?

Water quality in the Lake Mead National Recreation Area (LAKE), particularly Las Vegas Bay, is affected by water coming from the Las Vegas Wash, an urban perennial stream whose water is comprised of treated wastewater and urban runoff coming from the Las Vegas metropolitan area. Common carp collected from Las Vegas Wash and Las Vegas Bay and largemouth bass collected from Las Vegas Bay have...
By
Nevada Water Science Center
How are Endocrine-Disrupting Compounds Moving Through the Food Web in Lake Mead National Recreation Area?

How are Endocrine-Disrupting Compounds Moving Through the Food Web in Lake Mead National Recreation Area?

Water quality in the Lake Mead National Recreation Area (LAKE), particularly Las Vegas Bay, is affected by water coming from the Las Vegas Wash, an urban perennial stream whose water is comprised of treated wastewater and urban runoff coming from the Las Vegas metropolitan area. Common carp collected from Las Vegas Wash and Las Vegas Bay and largemouth bass collected from Las Vegas Bay have...
Learn More

Contaminants measured in multiple environmental media in the Lake Mead National Recreation Area NV/AZ, USA in 2010 Contaminants measured in multiple environmental media in the Lake Mead National Recreation Area NV/AZ, USA in 2010

Concentrations of a wide variety of environmental organic contaminants were measured in surface waters of the Lake Mead National Recreation Area (Nevada and Arizona) in 2010 to provide a measure of exposure to resident fish species. These contaminants were sampled using the semipermeable membrane device (SPMD) and the polar organic chemical integrative sampler (POCIS) which allow for the
By
Columbia Environmental Research Center

Organochlorine chemicals in northern cardinal eggs from suburban Washington, DC USA Organochlorine chemicals in northern cardinal eggs from suburban Washington, DC USA

Analysis of organochlorine pesticides and polychlorinated biphenyls (PCBs) in northern cardinal eggs from six neighborhoods near Washington, DC
By
Columbia Environmental Research Center

Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area (1999-2006) Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area (1999-2006)

Lake Mead National Recreational Area (LMNRA) serves as critical habitat for several federally listed species and supplies water for municipal, domestic, and agricultural use in the Southwestern U.S. Contaminant sources and concentrations vary among sub-basins within LMNRA. To investigate whether environmental contaminant exposure is associated with alterations in male common carp...
By
Wetland and Aquatic Research Center

Baseline aquatic contamination and endocrine status in a resident fish of Biscayne National Park Baseline aquatic contamination and endocrine status in a resident fish of Biscayne National Park

Surface water, sediment, and fish from Biscayne Bay, coastal wetlands adjacent to Biscayne Bay, and canals discharging into Biscayne Bay were sampled for determination of baseline contamination in Biscayne National Park. The number of contaminants detected in canal waters was greater during the wet season relative to the dry season, a relation not evident in Biscayne Bay or wetland...
By
Wetland and Aquatic Research Center
Filter Total Items: 42

Fish health altered by contaminants and low water temperatures compounded by prolonged regional drought in the Lower Colorado River Basin, USA Fish health altered by contaminants and low water temperatures compounded by prolonged regional drought in the Lower Colorado River Basin, USA

The goal of this study was to assess health of male Common Carp (carp, Cyprinus carpio) at four sites with a wide range in environmental organic contaminant (EOC) concentrations and water temperatures in Lake Mead National Recreation Area NV/AZ, US, and the potential influence of regional drought. Histological and reproductive biomarkers were measured in 17–30 carp at four sites and 130...
Authors
Steven L Goodbred, Reynaldo Patino, David A. Alvarez, Darren Johnson, Deena Hannoun, Kathy R. Echols, Jill Jenkins
By
Ecosystems Mission Area, Wetland and Aquatic Research Center , Colorado River Basin: Actionable and Strategic Integrated Science and Technology, Drought

Movement of synthetic organic compounds in the food web after the introduction of invasive quagga mussels (Dreissena bugensis) in Lake Mead, Nevada and Arizona, USA Movement of synthetic organic compounds in the food web after the introduction of invasive quagga mussels (Dreissena bugensis) in Lake Mead, Nevada and Arizona, USA

Introductions of dreissenid mussels in North America have been a significant concern over the last few decades. This study assessed the distribution of synthetic organic compounds (SOCs) in the food web of Lake Mead, Nevada/Arizona, USA and how this distribution was influenced by the introduction of invasive quagga mussels. A clear spatial gradient of SOC concentrations in water was...
Authors
Steven L. Goodbred, Michael R. Rosen, Reynaldo Patino, David A. Alvarez, Kathy R. Echols, Kerensa King, John Umek
By
Water Resources Mission Area, Ecosystems Mission Area, Cooperative Research Units, California Water Science Center, Columbia Environmental Research Center

Effects of microcystin-LR on juvenile Lost River suckers (Deltistes luxatus) during feeding trials, Upper Klamath Lake, Oregon, 2014−16 Effects of microcystin-LR on juvenile Lost River suckers (Deltistes luxatus) during feeding trials, Upper Klamath Lake, Oregon, 2014−16

Executive Summary Historically, populations of Lost River suckers (Deltistes luxatus) of the Upper Klamath Basin were so numerous that they were commercially harvested; however, declining numbers throughout the 20th century led to the listing of the species under the United States Endangered Species Act in 1988. Habitat destruction, poor water quality, competition with (and predation by)...
Authors
Barbara A. Martin, Kathy R. Echols, Diane G. Elliott, Kevin Feltz, Carla M. Conway, Summer M. Burdick
By
Ecosystems Mission Area, Contaminant Biology, Environmental Health Program, Columbia Environmental Research Center, Western Fisheries Research Center, Fish Health Program (FHP), Klamath Falls Field Station (KFFS)

Organochlorine chemical residues in Northern Cardinal (Cardinalis cardinalis) eggs from Greater Washington, DC USA Organochlorine chemical residues in Northern Cardinal (Cardinalis cardinalis) eggs from Greater Washington, DC USA

Northern Cardinal eggs from six neighborhoods near Washington DC were analyzed for organochlorine pesticides and PCBs. All compounds were detected more frequently and at higher concentrations in more heavily urbanized neighborhoods. DDT (mostly as p,pʹ-DDE) was detected in all neighborhoods. p,pʹ-DDT was typically 0.5‒16 ng/g (ww) in most suburban neighborhoods but was not detected (
Authors
Christopher J. Schmitt, Kathy R. Echols, Paul Peterman, Carl Orazio, Christiana Grimm, Shirlee Tan, Nora E. Diggs, Peter P. Marra
By
Ecosystems Mission Area, Columbia Environmental Research Center

Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area Sperm quality biomarkers complement reproductive and endocrine parameters in investigating environmental contaminants in common carp (Cyprinus carpio) from the Lake Mead National Recreation Area

Lake Mead National Recreational Area (LMNRA) serves as critical habitat for several federally listed species and supplies water for municipal, domestic, and agricultural use in the Southwestern U.S. Contaminant sources and concentrations vary among the sub-basins within LMNRA. To investigate whether exposure to environmental contaminants is associated with alterations in male common carp...
Authors
Jill A. Jenkins, Michael R. Rosen, Rassa O. Dale, Kathy R. Echols, Leticia Torres, Carla M. Wieser, Constance A. Kersten, S. Goodbred
By
Ecosystems Mission Area, Columbia Environmental Research Center, Wetland and Aquatic Research Center

Baseline aquatic contamination and endocrine status in a resident fish of Biscayne National Park Baseline aquatic contamination and endocrine status in a resident fish of Biscayne National Park

Surface water, sediment, and fish from Biscayne Bay, coastal wetlands adjacent to the Bay, and canals discharging into the Bay were sampled for determination of baseline contamination in Biscayne National Park. While the number of contaminants detected in canal waters was greater during the wet season than the dry season, no seasonal difference was evident for Biscayne Bay or coastal...
Authors
Timothy A. Bargar, Kevin R.T. Whelan, David Alvarez, Kathy R. Echols, Paul H. Peterman
By
Ecosystems Mission Area, Wetland and Aquatic Research Center , Columbia Environmental Research Center
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