Physical Scientist James Romano (UMid WSC, left) and Field Assistant Justin Peschman (UMid WSC, right) collect a sediment core from the Scuppernong River near Palmyra, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05426400
Hayley T Olds
Hayley Olds is a Hydrologist with the Upper Midwest Water Science Center in Wisconsin, where she has worked since 2012.
Hayley Olds is stationed in Milwaukee, Wisconsin. Her research has focused on freshwater quality assessments using both freshwater organisms and molecular source tracking. Hayley has experience with monitoring harmful algal blooms (HABs) composition, toxicity, and spatial extent using low-cost sampling techiques such as Solid Phase Adsorption Toxin Tracking (SPATT) technology throughout the Upper Midwest and Northeast regions, and nation-wide at National Parks throughout the country. Hayley also has experience in assessing benthic invertebrate, phytoplankton, and zooplankton communities, as well as sediment contamination and toxicity, in rivers and streams throughout Wisconsin, including several of Wisconsin’s Lake Michigan Areas of Concern. Over her career, Hayley has been involved in collecting and analyzing ecological data, including algae, invertebrates, fish, sediment, and surveying habitat at a local scale in southeastern Wisconsin's tributaries to Lake Michigan, as well as nationally in the Pacific Northwest, Northeast, and California regions.
Professional Experience
2015 - Present, Hydrologist, USGS Upper Midwest Water Science Center
2012 - 2015, Hydrologic Technician, USGS Upper Midwest Water Science Center
Education and Certifications
2015, M.S. in Freshwater Sciences and Technology – University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, Thesis: “The Identification and Quantification of Sewage Contamination in the Milwaukee Estu
2013, B.S. in Water Resources – University of Wisconsin-Stevens Point, Stevens Point, Wisconsin.
Affiliations and Memberships*
Wisconsin Section of the American Water Resources Association
- 2012 - Present, Member
- 2019 - Present, Planning Committee Communications Chair
Science and Products
Integrated Ecosystems Studies Team
MMSD Watercourse Corridor Study: Ecological Assessments and Trends
Select optical signals from water samples collected on the Menomonee River, Underwood Creek, and Jones Island Water Reclamation Facility from 2017-2019, and time-series optical sensor and one-hour mean streamflow data from the Menomonee River 2017-2018
Polychlorinated biphenyl (PCB) data from instream water and sediment passive samplers, stream bank sediment, and catch basin sediment in the Clinton River Area of Concern, Michigan, USA, 2019
Bottom sediment chemical data at rivermouths and harbors along western Lake Michigan, USA, 2016
Rapid assessment test strip data for determining cyanotoxin presence in algal blooms, Kabetogama Lake, northern Minnesota, 2017-2018
Aquatic community and environmental data for 14 rivers and streams in the Milwaukee Metropolitan Sewerage District Planning Area, 2004-13
Phytoplankton enumeration and identification from a recurring algal bloom location in Sullivan Bay, Kabetogama Lake, northern Minnesota, 2016
Human-associated indicator bacteria and human specific virus loads, sample volumes, and drainage areas for six Menomonee River Watershed sampling locations
Benthos and Plankton data for Waukegan Harbor Area of Concern, Illinois, and Burns Harbor-Port of Indiana Non-Area of Concern, Indiana, in 2015
Physical Scientist James Romano (UMid WSC, left) and Field Assistant Justin Peschman (UMid WSC, right) collect a sediment core from the Scuppernong River near Palmyra, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05426400
Biologist Pat Perner (USGS Upper Midwest Environmental Science Center, left) and Physical Scientist James Romano (UMid WSC, right) collect a sediment core from the Mukwonago River at Mukwonago, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05544200/
Biologist Pat Perner (USGS Upper Midwest Environmental Science Center, left) and Physical Scientist James Romano (UMid WSC, right) collect a sediment core from the Mukwonago River at Mukwonago, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05544200/
Two scientists collect a sediment core from the Root River at Grange Avenue in Greenfield, Wisconsin
linkBiologist Pat Perner (USGS Upper Midwest Environmental Science Center, left) and Field Assistant Justin Peschman (UMid WSC, right) collect a sediment core from the Root River at Grange Avenue in Greenfield, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087214/
Two scientists collect a sediment core from the Root River at Grange Avenue in Greenfield, Wisconsin
linkBiologist Pat Perner (USGS Upper Midwest Environmental Science Center, left) and Field Assistant Justin Peschman (UMid WSC, right) collect a sediment core from the Root River at Grange Avenue in Greenfield, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087214/
Field Assistant Justin Peschman (UMid WSC) filters a water sample for nutrient analysis at Mukwonago River at Mukwonago, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05544200/
Field Assistant Justin Peschman (UMid WSC) filters a water sample for nutrient analysis at Mukwonago River at Mukwonago, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05544200/
Habitat sampling at a restored reach at Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
Habitat sampling at a restored reach at Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
A restored section of Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
A restored section of Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
USGS scientists electrofishing with a backpack shocker at Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/.
USGS scientists electrofishing with a backpack shocker at Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/.
USGS scientist holding a white sucker fish caught in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
USGS scientist holding a white sucker fish caught in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
USGS scientist holding a milting rainbow trout caught as part of an assessment of fish passage in Underwood Creek at Wauwatosa, Wisconsin, just downstream of I-41/US 45. https://waterdata.usgs.gov/monitoring-location/04087088/
USGS scientist holding a milting rainbow trout caught as part of an assessment of fish passage in Underwood Creek at Wauwatosa, Wisconsin, just downstream of I-41/US 45. https://waterdata.usgs.gov/monitoring-location/04087088/
Rainbow trout caught in net in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
Rainbow trout caught in net in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
USGS scientist holding a male central stoneroller caught in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/. This fish is native to Wisconsin; the tubercles (bumps) on its head indicate that it is spawning.
USGS scientist holding a male central stoneroller caught in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/. This fish is native to Wisconsin; the tubercles (bumps) on its head indicate that it is spawning.
Close-up view of defined area of a rock cobble (middle) where attached algae and other material were removed with a brush. Rocks from multiple locations at a site are composited into a single sample representing the stream site.
Close-up view of defined area of a rock cobble (middle) where attached algae and other material were removed with a brush. Rocks from multiple locations at a site are composited into a single sample representing the stream site.
USGS scientist collecting one of five subsamples of aquatic invertebrates from a stream riffle by removing invertebrates from a defined area and collecting them with a Surber net. Each subsample is transferred to a bucket for compositing into a single sample for the site.
USGS scientist collecting one of five subsamples of aquatic invertebrates from a stream riffle by removing invertebrates from a defined area and collecting them with a Surber net. Each subsample is transferred to a bucket for compositing into a single sample for the site.
Close up-view of defined area of the stream bottom where attached invertebrates are removed with a brush and washed into the Surber net; where possible, a hand rake is also used to dislodge organisms from shallow depths.
Close up-view of defined area of the stream bottom where attached invertebrates are removed with a brush and washed into the Surber net; where possible, a hand rake is also used to dislodge organisms from shallow depths.
After collection, invertebrates are washed through a series of sieves where large debris can be removed before being placed in the sample bottle.
After collection, invertebrates are washed through a series of sieves where large debris can be removed before being placed in the sample bottle.
PCB source assessment in the lower Clinton River, Clinton River Area of Concern, Mount Clemens, Michigan
Modeled predictions of human-associated and fecal-indicator bacteria concentrations and loadings in the Menomonee River, Wisconsin using in-situ optical sensors
Phytoplankton community interactions and cyanotoxin mixtures in three recurring surface blooms within one lake
Cyanotoxin mixture models: Relating environmental variables and toxin co-occurrence to human exposure risk
Toxic cyanobacterial blooms, often containing multiple toxins, are a serious public health issue. However, there are no known models that predict a cyanotoxin mixture (anatoxin-a, microcystin, saxitoxin). This paper presents two cyanotoxin mixture models (MIX) and compares them to two microcystin (MC) models from data collected in 2016–2017 from three recurring cyanobacterial bloom locations in Ka
Benthos and plankton of western Lake Michigan Areas of Concern in comparison to non-Areas of Concern for selected rivers and harbors, 2012 and 2014
Human-associated indicator bacteria and human-specific viruses in surface water: a spatial assessment with implications on fate and transport
An evaluation of the zooplankton community at the Sheboygan River Area of Concern and non-Area of Concern comparison sites in western Lake Michigan rivers and harbors in 2016
Comparison of benthos and plankton for Waukegan Harbor Area of Concern, Illinois, and Burns Harbor-Port of Indiana non-Area of Concern, Indiana, in 2015
Comparison of benthos and plankton for selected areas of concern and non-areas of concern in western Lake Michigan Rivers and Harbors in 2012
Quantification of human-associated fecal indicators reveal sewage from urban watersheds as a source of pollution to Lake Michigan
Benthos and plankton community data for selected rivers and harbors along the western Lake Michigan shoreline, 2014
Benthos and plankton community data for selected rivers and harbors along Wisconsin's Lake Michigan shoreline, 2012
Science and Products
- Science
Integrated Ecosystems Studies Team
The Integrated Ecosystem Studies Team (IES) at the Upper Midwest Water Science Center uses interdisciplinary approaches to investigate characteristics and drivers of water quality and aquatic biology in rivers, lakes, and wetlands.MMSD Watercourse Corridor Study: Ecological Assessments and Trends
Changes in streams that result from urban development such as loss of stream habitat, inadequate or flashy streamflow, and degraded water quality can adversely affect communities of aquatic organisms. MMSD Watercourse Corridor Study ecological assessments evaluate water quality over time by pairing community assessments of aquatic organisms with chemical assessments from passive samplers, as well... - Data
Select optical signals from water samples collected on the Menomonee River, Underwood Creek, and Jones Island Water Reclamation Facility from 2017-2019, and time-series optical sensor and one-hour mean streamflow data from the Menomonee River 2017-2018
5-day composite river water samples were collected from two sites: Menomonee River (U.S. Geological Survey station number 04087142) and Underwood Creek (U.S. Geological Survey station number 04087088) in Milwaukee, Wisconsin. 5-day composite wastewater (raw sewage) influent samples were also collected from the Jones Island Water Reclamation Facility (U.S. Geological Survey station number 430125087Polychlorinated biphenyl (PCB) data from instream water and sediment passive samplers, stream bank sediment, and catch basin sediment in the Clinton River Area of Concern, Michigan, USA, 2019
Two types of passive samplers for polychlorinated biphenyl (PCB) analysis were deployed in the Clinton River Area of Concern in 2019: semipermeable membrane devices for water and in-stream sediment samplers. Samplers were deployed in July 2019 and retrieved in August 2019. Additionally, bank sediment samples for PCB analysis were collected by the U.S. Geological Survey (USGS) in August 2019 and caBottom sediment chemical data at rivermouths and harbors along western Lake Michigan, USA, 2016
Streambed sediment samples were collected in October 2016 from streams tributary to Wisconsin?s western Lake Michigan shoreline. Streams included two Areas of Concern (AOCs), two non-AOC comparisons, and two additional non-AOC study areas. Within the Milwaukee Estuary AOC, samples were collected from the Milwaukee River (three subsites), the Menomonee River (two subsites), the Kinnickinnic River (Rapid assessment test strip data for determining cyanotoxin presence in algal blooms, Kabetogama Lake, northern Minnesota, 2017-2018
Algal toxins are a growing concern worldwide. Rapid assessment test strips are a newer technology and their accuracy in detecting toxins in different lakes with different phytoplankton and toxins present is unknown. This data release is supported by our testing of toxin test strips. This research took place in Voyageurs National Park in northern Minnesota. The research will indicate whether theseAquatic community and environmental data for 14 rivers and streams in the Milwaukee Metropolitan Sewerage District Planning Area, 2004-13
In 2004, 2007, 2010, and 2013, the U.S. Geological Survey sampled benthic algae and invertebrates, and fish to assess the condition of the aquatic communities and water quality in 14 wadable streams near Milwaukee, Wisconsin. Additional community sampling was also done at a subset of three sites in 2011 and 2012 to assess temporal variation. Selected environmental (physical and chemical) data in tPhytoplankton enumeration and identification from a recurring algal bloom location in Sullivan Bay, Kabetogama Lake, northern Minnesota, 2016
This data release provides phytoplankton identification, phytoplankton enumeration, chlorophyll concentration, phaeophytin concentration, phycocyanin data, and nutrient quality assurance data from three recurring algal bloom sites in Kabetogama Lake, Voyaguers National Park, Minnesota in 2016 and 2017. The goal of this research is to better understand the drivers of algal bloom toxicity in the larHuman-associated indicator bacteria and human specific virus loads, sample volumes, and drainage areas for six Menomonee River Watershed sampling locations
Human-associated indicator bacteria and human specific viruses in the Menomonee River watershed in Milwaukee, WI were investigated from April 2009 to March 2011 at six sampling locations within the watershed. We used concentration and water volume data from runoff-event and low-flow periods to compute loads for each sample collected, and subsequently used those loads, and drainage area from eachBenthos and Plankton data for Waukegan Harbor Area of Concern, Illinois, and Burns Harbor-Port of Indiana Non-Area of Concern, Indiana, in 2015
During two seasonal sampling events in spring (June) and fall (August) of 2015, the U.S. Geological Survey, in cooperation with the Illinois Department of Natural Resources and the U.S. Environmental Protection Agency, collected benthos (benthic invertebrates) and plankton (zooplankton and phytoplankton) at three sites each in the Waukegan Harbor Area of Concern (AOC) in Illinois and in Burns Harb - Multimedia
Two scientists collect a sediment core from the Scuppernong River near Palmyra, WisconsinTwo scientists collect a sediment core from the Scuppernong River near Palmyra, Wisconsin
Physical Scientist James Romano (UMid WSC, left) and Field Assistant Justin Peschman (UMid WSC, right) collect a sediment core from the Scuppernong River near Palmyra, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05426400
Physical Scientist James Romano (UMid WSC, left) and Field Assistant Justin Peschman (UMid WSC, right) collect a sediment core from the Scuppernong River near Palmyra, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05426400
Two scientists collect a sediment core from the Mukwonago River at Mukwonago, WisconsinTwo scientists collect a sediment core from the Mukwonago River at Mukwonago, WisconsinBiologist Pat Perner (USGS Upper Midwest Environmental Science Center, left) and Physical Scientist James Romano (UMid WSC, right) collect a sediment core from the Mukwonago River at Mukwonago, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05544200/
Biologist Pat Perner (USGS Upper Midwest Environmental Science Center, left) and Physical Scientist James Romano (UMid WSC, right) collect a sediment core from the Mukwonago River at Mukwonago, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05544200/
Two scientists collect a sediment core from the Root River at Grange Avenue in Greenfield, WisconsinTwo scientists collect a sediment core from the Root River at Grange Avenue in Greenfield, WisconsinTwo scientists collect a sediment core from the Root River at Grange Avenue in Greenfield, Wisconsin
linkBiologist Pat Perner (USGS Upper Midwest Environmental Science Center, left) and Field Assistant Justin Peschman (UMid WSC, right) collect a sediment core from the Root River at Grange Avenue in Greenfield, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087214/
Two scientists collect a sediment core from the Root River at Grange Avenue in Greenfield, Wisconsin
linkBiologist Pat Perner (USGS Upper Midwest Environmental Science Center, left) and Field Assistant Justin Peschman (UMid WSC, right) collect a sediment core from the Root River at Grange Avenue in Greenfield, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087214/
Scientist filters a water sample in the field for nutrient analysisScientist filters a water sample in the field for nutrient analysisField Assistant Justin Peschman (UMid WSC) filters a water sample for nutrient analysis at Mukwonago River at Mukwonago, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05544200/
Field Assistant Justin Peschman (UMid WSC) filters a water sample for nutrient analysis at Mukwonago River at Mukwonago, Wisconsin. https://waterdata.usgs.gov/monitoring-location/05544200/
Habitat sampling at Underwood Creek at Wauwatosa, WisconsinHabitat sampling at Underwood Creek at Wauwatosa, WisconsinHabitat sampling at a restored reach at Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
Habitat sampling at a restored reach at Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
A restored section of Underwood Creek at Wauwatosa, WisconsinA restored section of Underwood Creek at Wauwatosa, WisconsinA restored section of Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
A restored section of Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
Fish shocking with backpack shocker at Underwood Creek at Wauwatosa, WisconsinFish shocking with backpack shocker at Underwood Creek at Wauwatosa, WisconsinUSGS scientists electrofishing with a backpack shocker at Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/.
USGS scientists electrofishing with a backpack shocker at Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/.
Scientist holding a white sucker fish caught in Underwood Creek at Wauwatosa, WisconsinScientist holding a white sucker fish caught in Underwood Creek at Wauwatosa, WisconsinUSGS scientist holding a white sucker fish caught in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
USGS scientist holding a white sucker fish caught in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
A milting rainbow trout caught in Underwood Creek at Wauwatosa, WisconsinA milting rainbow trout caught in Underwood Creek at Wauwatosa, WisconsinUSGS scientist holding a milting rainbow trout caught as part of an assessment of fish passage in Underwood Creek at Wauwatosa, Wisconsin, just downstream of I-41/US 45. https://waterdata.usgs.gov/monitoring-location/04087088/
USGS scientist holding a milting rainbow trout caught as part of an assessment of fish passage in Underwood Creek at Wauwatosa, Wisconsin, just downstream of I-41/US 45. https://waterdata.usgs.gov/monitoring-location/04087088/
Rainbow trout in netRainbow trout caught in net in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
Rainbow trout caught in net in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/
Breeding male central stoneroller fishUSGS scientist holding a male central stoneroller caught in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/. This fish is native to Wisconsin; the tubercles (bumps) on its head indicate that it is spawning.
USGS scientist holding a male central stoneroller caught in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/. This fish is native to Wisconsin; the tubercles (bumps) on its head indicate that it is spawning.
Algal sampling after removal of subsampleClose-up view of defined area of a rock cobble (middle) where attached algae and other material were removed with a brush. Rocks from multiple locations at a site are composited into a single sample representing the stream site.
Close-up view of defined area of a rock cobble (middle) where attached algae and other material were removed with a brush. Rocks from multiple locations at a site are composited into a single sample representing the stream site.
Invertebrate samplingUSGS scientist collecting one of five subsamples of aquatic invertebrates from a stream riffle by removing invertebrates from a defined area and collecting them with a Surber net. Each subsample is transferred to a bucket for compositing into a single sample for the site.
USGS scientist collecting one of five subsamples of aquatic invertebrates from a stream riffle by removing invertebrates from a defined area and collecting them with a Surber net. Each subsample is transferred to a bucket for compositing into a single sample for the site.
Invertebrate sampling closeupClose up-view of defined area of the stream bottom where attached invertebrates are removed with a brush and washed into the Surber net; where possible, a hand rake is also used to dislodge organisms from shallow depths.
Close up-view of defined area of the stream bottom where attached invertebrates are removed with a brush and washed into the Surber net; where possible, a hand rake is also used to dislodge organisms from shallow depths.
Invertebrate sampling - sievingAfter collection, invertebrates are washed through a series of sieves where large debris can be removed before being placed in the sample bottle.
After collection, invertebrates are washed through a series of sieves where large debris can be removed before being placed in the sample bottle.
- Publications
PCB source assessment in the lower Clinton River, Clinton River Area of Concern, Mount Clemens, Michigan
Polychlorinated biphenyls (PCBs), some of the earliest “forever chemicals,” were used for decades in the United States before 1979 when PCB manufacturing was banned. High PCB concentrations were found recently in the lower Clinton River in the Great Lakes drainage. To determine the possible existence, location, and significance of a current source of PCBs, the U.S. Geological Survey (USGS) deployeAuthorsBarbara C. Scudder Eikenberry, Hayley Olds, Owen M. Stefaniak, David A. AlvarezModeled predictions of human-associated and fecal-indicator bacteria concentrations and loadings in the Menomonee River, Wisconsin using in-situ optical sensors
Human sewage contamination of waterways is a major issue in the United States and throughout the world. Models were developed for estimation of two human-associated fecal-indicator and three general fecal-indicator bacteria (HIB and FIB) using in situ optical field-sensor data for estimating concentrations and loads of HIB and FIB and the extent of sewage contamination in the Menomonee River in MiAuthorsPeter L. Lenaker, Steven R. Corsi, Laura A. DeCicco, Hayley T. Olds, Debra K. Dila, Mari Danz, Sandra L. McLellan, Troy D. RutterPhytoplankton community interactions and cyanotoxin mixtures in three recurring surface blooms within one lake
Cyanobacteria can produce numerous secondary metabolites (cyanotoxins) with various toxicities, yet data on cyanotoxins in many lakes are limited. Moreover, little research is available on complex relations among cyanobacteria that produce toxins. Therefore, we studied cyanobacteria and 19 cyanotoxins at three sites with recurring blooms in Kabetogama Lake (USA). Seven of 19 toxins were detected iAuthorsVictoria Christensen, Hayley T. Olds, Jack E. Norland, Eakalak KhanCyanotoxin mixture models: Relating environmental variables and toxin co-occurrence to human exposure risk
Toxic cyanobacterial blooms, often containing multiple toxins, are a serious public health issue. However, there are no known models that predict a cyanotoxin mixture (anatoxin-a, microcystin, saxitoxin). This paper presents two cyanotoxin mixture models (MIX) and compares them to two microcystin (MC) models from data collected in 2016–2017 from three recurring cyanobacterial bloom locations in Ka
AuthorsVictoria Christensen, Erin A. Stelzer, Barbara C. Scudder Eikenberry, Hayley T. Olds, Jaime F. LeDuc, Ryan P. Maki, Jack E. Norland, Eakalak KhanBenthos and plankton of western Lake Michigan Areas of Concern in comparison to non-Areas of Concern for selected rivers and harbors, 2012 and 2014
Since their designation in the 1980s, Areas of Concern (AOCs) around the Great Lakes have been the focus of multi-State and international cleanup efforts that were needed after decades of human activity resulted in severely contaminated sediment, water-quality degradation, loss of habitat for aquatic organisms, and impaired public use. Although individual Great Lake States had been working to cleaAuthorsBarbara C. Scudder Eikenberry, Hayley T. Olds, Daniel J. Burns, Amanda H. Bell, James L. CarterHuman-associated indicator bacteria and human-specific viruses in surface water: a spatial assessment with implications on fate and transport
Hydrologic, seasonal, and spatial variability of sewage contamination was studied at six locations within a watershed upstream from water reclamation facility (WRF) effluent to define relative loadings of sewage from different portions of the watershed. Fecal pollution from human sources was spatially quantified by measuring two human-associated indicator bacteria (HIB) and eight human-specific viAuthorsPeter L. Lenaker, Steven R. Corsi, Sandra L. McLellan, Mark A. Borchardt, Hayley T. Olds, Deborah K. Dila, Susan K. Spencer, Austin K. BaldwinAn evaluation of the zooplankton community at the Sheboygan River Area of Concern and non-Area of Concern comparison sites in western Lake Michigan rivers and harbors in 2016
The Great Lakes Areas of Concern (AOCs) are considered to be the most severely degraded areas within the Great Lakes basin, as defined in the Great Lakes Water Quality Agreement and amendments. Among the 43 designated AOCs are four Lake Michigan AOCs in the State of Wisconsin. The smallest of these AOCs is the Sheboygan River AOC, which was designated as an AOC because of sediment contamination frAuthorsHayley T. Olds, Barbara C. Scudder Eikenberry, Daniel J. Burns, Amanda H. BellComparison of benthos and plankton for Waukegan Harbor Area of Concern, Illinois, and Burns Harbor-Port of Indiana non-Area of Concern, Indiana, in 2015
During two seasonal sampling events in spring (June) and fall (August) of 2015, the U.S. Geological Survey collected benthos (benthic invertebrates) and plankton (zooplankton and phytoplankton) at three sites each in the Waukegan Harbor Area of Concern (AOC) in Illinois and in Burns Harbor-Port of Indiana, a non-AOC comparison site in Indiana. The study was done in cooperation with the U.S. EnviroAuthorsBarbara C. Scudder Eikenberry, Hayley T. Olds, Daniel J. Burns, Edward G. Dobrowolski, Kurt L. SchmudeComparison of benthos and plankton for selected areas of concern and non-areas of concern in western Lake Michigan Rivers and Harbors in 2012
Recent data are lacking to assess whether impairments still exist at four of Wisconsin’s largest Lake Michigan harbors that were designated as Areas of Concern (AOCs) in the late 1980s due to sediment contamination and multiple Beneficial Use Impairments (BUIs), such as those affecting benthos (macroinvertebrates) and plankton (zooplankton and phytoplankton) communities. During three seasonal sampAuthorsBarbara C. Scudder Eikenberry, Amanda H. Bell, Hayley T. Olds, Daniel J. BurnsQuantification of human-associated fecal indicators reveal sewage from urban watersheds as a source of pollution to Lake Michigan
Sewage contamination of urban waterways from sewer overflows and failing infrastructure is a major environmental and public health concern. Fecal coliforms (FC) are commonly employed as fecal indicator bacteria, but do not distinguish between human and non-human sources of fecal contamination. Human Bacteroides and humanLachnospiraceae, two genetic markers for human-associated indicator bacteria,AuthorsHayley T. Olds, Deborah K. Dila, Melinda J. Bootsma, Steven R. Corsi, Sandra L. McLellanBenthos and plankton community data for selected rivers and harbors along the western Lake Michigan shoreline, 2014
Benthos (benthic invertebrates) and plankton (zooplankton and phytoplankton) communities were sampled in 2014 at 10 Wisconsin rivers and harbors, including 4 sites in Great Lakes Areas of Concern and 6 less degraded comparison sites with similar physical and chemical characteristics, including climate, latitude, geology, and land use. Previous U.S. Geological Survey sampling was completed in 2012,AuthorsBarbara C. Scudder Eikenberry, Daniel J. Burns, Hayley T. Olds, Amanda H. Bell, Kassidy T. MapelBenthos and plankton community data for selected rivers and harbors along Wisconsin's Lake Michigan shoreline, 2012
Four river systems on the Wisconsin shoreline of Lake Michigan are designated Areas of Concern (AOCs) because of severe environmental degradation: the Lower Menominee River, Lower Green Bay and Fox River, Sheboygan River, and Milwaukee Estuary. Each AOC has one or more Beneficial Use Impairments (BUIs) that form the basis of the AOC designation and that must be remediated or otherwise addressed beAuthorsBarbara C. Scudder Eikenberry, Amanda H. Bell, Daniel J. Burns, Hayley T. Olds
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government