Jennifer L Graham, Ph.D.
Jennifer is a Research Hydrologist at the New York Water Science Center
Jennifer Graham currently serves as the harmful algal bloom coordinator for the USGS Water Mission Area. She also represents the USGS on the Interagency Working Group on Harmful Algal Blooms and Hypoxia. Jennifer began her career with the USGS in 1999 as a Volunteer for Science working on harmful algal blooms at the Columbia Environmental Research Center. She worked there as a volunteer until 2005, when she became a Hydrologist at the Kansas Water Science Center. Jennifer joined the New York Water Science Center in 2018. She is a nationally recognized expert in cyanobacteria and associated toxins and taste-and-odor compounds. For over two decades Jennifer has conducted research on the environmental factors influencing the occurrence of cyanotoxins in the United States. She has conducted both regional and single system studies at a variety of spatiotemporal scales.
The overarching theme of Jennifer’s research is the spatiotemporal distribution of algae and algal assemblages with respect to changing physical, chemical, and biological conditions in both lentic and lotic ecosystems. Focus areas currently include anthropogenic influences on algal production and community composition, environmental conditions leading to the development of harmful algal blooms, with an emphasis on cyanobacteria, the occurrence, fate, and transport of cyanobacterial toxins and taste-and-odor compounds, and the development of predictive models for the occurrence of cyanobacterial toxins and taste-and-odor compounds. She has a complimentary interest in evaluating and using leading-edge technology, such as continuous water-quality instrumentation and satellite imagery, to improve predictive capabilities for the onset, duration, and decline of harmful algal bloom events. Research efforts include partnerships within the USGS as well as with local, state, and federal agencies and universities.
Professional Experience
USGS as Research Hydrologist at the New York Water Science Center 2018-present.
USGS as a Hydrologist at the Kansas Water Science Center 2005-2018.
USGS as a Volunteer for Science working on harmful algal blooms at the Columbia Environmental Research Center 1999-2005.
Education and Certifications
PhD in Fisheries and Wildlife with a specialization in Limnology (2004) – University of Missouri, Columbia, MO
MS in Biology with a specialization in Aquatic Ecology (1998) – Southwest Missouri
BS in Environmental Science (1995) – Davis and Elkins College, Elkins, WV
Science and Products
Occurrence of cyanobacteria, microcystin, and taste-and-odor compounds in Cheney Reservoir, Kansas, 2001-16
Predicting cyanobacterial abundance, microcystin, and geosmin in a eutrophic drinking-water reservoir using a 14-year dataset
Cyanobacterial harmful algal blooms and U.S. Geological Survey science capabilities
Estimating microcystin levels at recreational sites in western Lake Erie and Ohio
Cyanobacterial harmful algal blooms (cyanoHABs) and associated toxins, such as microcystin, are a major global water-quality issue. Water-resource managers need tools to quickly predict when and where toxin-producing cyanoHABs will occur. This could be done by using site-specific models that estimate the potential for elevated toxin concentrations that cause public health concerns. With this study
Sediment oxygen demand in eastern Kansas streams, 2014 and 2015
Elucidation of taste- and odor-producing bacteria and toxigenic cyanobacteria in a Midwestern drinking water supply reservoir by shotgun metagenomics analysis
Cyanotoxins in inland lakes of the United States: Occurrence and potential recreational health risks in the EPA National Lakes Assessment 2007
Challenges for mapping cyanotoxin patterns from remote sensing of cyanobacteria
Seasonal patterns in carbon dioxide in 15 mid-continent (USA) reservoirs
Logistic and linear regression model documentation for statistical relations between continuous real-time and discrete water-quality constituents in the Kansas River, Kansas, July 2012 through June 2015
Combined effects of nitrogen to phosphorus and nitrate toammonia ratios on cyanobacterial metabolite concentrations ineutrophic Midwestern USA reservoirs
Responses of macroinvertebrate community metrics to a wastewater discharge in the Upper Blue River of Kansas and Missouri, USA
Science and Products
- Science
- Data
Filter Total Items: 22No Result Found
- Multimedia
- Publications
Filter Total Items: 67
Occurrence of cyanobacteria, microcystin, and taste-and-odor compounds in Cheney Reservoir, Kansas, 2001-16
Cheney Reservoir, located in south-central Kansas, is one of the primary drinking-water supplies for the city of Wichita and an important recreational resource. Since 1990, cyanobacterial blooms have been present occasionally in Cheney Reservoir, resulting in increased treatment costs and decreased recreational use. Cyanobacteria, the cyanotoxin microcystin, and the taste-and-odor compounds geosmiAuthorsJennifer L. Graham, Guy M. Foster, Thomas J. Williams, Ariele R. Kramer, Theodore D. HarrisPredicting cyanobacterial abundance, microcystin, and geosmin in a eutrophic drinking-water reservoir using a 14-year dataset
Cyanobacterial blooms degrade water quality in drinking water supply reservoirs by producing toxic and taste-and-odor causing secondary metabolites, which ultimately cause public health concerns and lead to increased treatment costs for water utilities. There have been numerous attempts to create models that predict cyanobacteria and their secondary metabolites, most using linear models; however,AuthorsTed D. Harris, Jennifer L. GrahamCyanobacterial harmful algal blooms and U.S. Geological Survey science capabilities
Cyanobacterial harmful algal blooms (CyanoHABs) are increasingly a global concern because CyanoHABs pose a threat to human and aquatic ecosystem health and cause economic damages. Despite advances in scientific understanding of cyanobacteria and associated compounds, many unanswered questions remain about occurrence, environmental triggers for toxicity, and the ability to predict the timing, duratAuthorsJennifer L. Graham, Neil M. Dubrovsky, Sandra M. EbertsEstimating microcystin levels at recreational sites in western Lake Erie and Ohio
Cyanobacterial harmful algal blooms (cyanoHABs) and associated toxins, such as microcystin, are a major global water-quality issue. Water-resource managers need tools to quickly predict when and where toxin-producing cyanoHABs will occur. This could be done by using site-specific models that estimate the potential for elevated toxin concentrations that cause public health concerns. With this study
AuthorsDonna S. Francy, Amie M.G. Brady, Christopher D. Ecker, Jennifer L. Graham, Erin A. Stelzer, Pamela Struffolino, Keith A. LoftinSediment oxygen demand in eastern Kansas streams, 2014 and 2015
Dissolved oxygen concentrations in streams are affected by physical, chemical, and biological factors in the water column and streambed, and are an important factor for the survival of aquatic organisms. Sediment oxygen demand (SOD) rates in Kansas streams are not well understood. During 2014 and 2015, the U.S. Geological Survey, in cooperation with the Kansas Department of Health and Environment,AuthorsGuy M. Foster, Lindsey R. King, Jennifer L. GrahamElucidation of taste- and odor-producing bacteria and toxigenic cyanobacteria in a Midwestern drinking water supply reservoir by shotgun metagenomics analysis
While commonplace in clinical settings, DNA-based assays for identification or enumeration of drinking water pathogens and other biological contaminants remain widely unadopted by the monitoring community. In this study, shotgun metagenomics was used to identify taste-and-odor producers and toxin-producing cyanobacteria over a 2-year period in a drinking water reservoir. The sequencing data implicAuthorsTimothy Otten, Jennifer L. Graham, Theodore D. Harris, Theo DreherCyanotoxins in inland lakes of the United States: Occurrence and potential recreational health risks in the EPA National Lakes Assessment 2007
A large nation-wide survey of cyanotoxins (1161 lakes) in the United States (U.S.) was conducted during the EPA National Lakes Assessment 2007. Cyanotoxin data were compared with cyanobacteria abundance- and chlorophyll-based World Health Organization (WHO) thresholds and mouse toxicity data to evaluate potential recreational risks. Cylindrospermopsins, microcystins, and saxitoxins were detected (AuthorsKeith A. Loftin, Jennifer L. Graham, Elizabeth Hilborn, Sarah Lehmann, Michael T. Meyer, Julie E. Dietze, Christopher GriffithChallenges for mapping cyanotoxin patterns from remote sensing of cyanobacteria
Using satellite imagery to quantify the spatial patterns of cyanobacterial toxins has several challenges. These challenges include the need for surrogate pigments – since cyanotoxins cannot be directly detected by remote sensing, the variability in the relationship between the pigments and cyanotoxins – especially microcystins (MC), and the lack of standardization of the various measurement methodAuthorsRick P Stumpf, Timothy W. Davis, Timothy T. Wynne, Jennifer L. Graham, Keith A. Loftin, T.H. Johengen, D. Gossiaux, D. Palladino, A. BurtnerSeasonal patterns in carbon dioxide in 15 mid-continent (USA) reservoirs
Evidence suggests that lakes are important sites for atmospheric CO2 exchange and so play a substantial role in the global carbon budget. Previous research has 2 weaknesses: (1) most data have been collected only during the open-water or summer seasons, and (2) data are concentrated principally on natural lakes in northern latitudes. Here, we report on the full annual cycle of atmospheric CO2 exchAuthorsJohn R. Jones, Daniel V. Obrecht, Jennifer L. Graham, Michelle B. Balmer, Christopher T. Filstrup, John A. DowningLogistic and linear regression model documentation for statistical relations between continuous real-time and discrete water-quality constituents in the Kansas River, Kansas, July 2012 through June 2015
The Kansas River is a primary source of drinking water for about 800,000 people in northeastern Kansas. Source-water supplies are treated by a combination of chemical and physical processes to remove contaminants before distribution. Advanced notification of changing water-quality conditions and cyanobacteria and associated toxin and taste-and-odor compounds provides drinking-water treatment facilAuthorsGuy M. Foster, Jennifer L. GrahamCombined effects of nitrogen to phosphorus and nitrate toammonia ratios on cyanobacterial metabolite concentrations ineutrophic Midwestern USA reservoirs
Recent studies have shown that the total nitrogen to total phosphorus (TN:TP) ratio and nitrogen oxidation state may have substantial effects on secondary metabolite (e.g., microcystins) production in cyanobacteria. We investigated the relationship between the water column TN:TP ratio and the cyanobacterial secondary metabolites geosmin, 2-methylisoborneol (MIB), and microcystin using multiple yeaAuthorsTheodore D. Harris, Val H. Smith, Jennifer L. Graham, Dedmer B. Van de Waal, Lenore Tedesco, Nicolas ClercinResponses of macroinvertebrate community metrics to a wastewater discharge in the Upper Blue River of Kansas and Missouri, USA
The Blue River Main wastewater treatment facility (WWTF) discharges into the upper Blue River (725 km2), and is recently upgraded to implement biological nutrient removal. We measured biotic condition upstream and downstream of the discharge utilizing the macroinvertebrate protocol developed for Kansas streams. We examined responses of 34 metrics to determine the best indicators for discriminatingAuthorsBarry C. Poulton, Jennifer L. Graham, Teresa J. Rasmussen, Mandy L. Stone - Software
- News