Stokdyk, J., and Herrman, K., 2016, Effects of Frangula alnus on soil microbial communities and biogeochemical processes in Wisconsin forests: Plant and Soil v. 409, n. 1-2, p. 65-75. doi: 10.1007/s11104-016- 2916-z
Joel P Stokdyk
Biography
EDUCATION
2014. MS, Natural Resources. University of Wisconsin-Stevens Point
2012. BS, Soil and Land Management with minor in Geographic Information Systems and Spatial Analysis; Wetland Science Certificate. University of Wisconsin-Stevens Point
EXPERTISE
Analysis of human and agricultural zoonotic pathogens and fecal indicators in environmental matrices
Quantitative polymerase chain reaction (qPCR)
Large-volume sampling techniques for analysis of viruses and bacteria in water
Human enteric viruses in groundwater
RESEARCH INTERESTS
Occurrence, fate and transport, and health effects of viruses in the environment
Persistence of pathogens in soil, groundwater, and surface water
Plant-soil-microbe interactions
Factors affecting pathogen contamination of drinking water wells
CURRENT PROJECTS
Southwest Wisconsin groundwater and geology (SWIGG) study
Wells and enteric-disease transmission, epidemiological trial
Viral, bacterial, and protozoan pathogens and fecal markers in groundwater for public water supplies in Minnesota
Groundwater contamination occurrence, source, variability with depth to bedrock, and relationship to recharge in Kewaunee County, Wisconsin
Science and Products
Date published: April 27, 2020
Status: Active Southwest Wisconsin Groundwater and Geology (SWIGG) study
The fractured bedrock aquifers of southwest Wisconsin are often overlain by shallow soils, so private wells are potentially vulnerable to contamination by nitrate and pathogens from the land surface. The goal of this study is to evaluate the extent and causes of private well water contamination in three southwest Wisconsin counties.
Contacts: Joel P Stokdyk, Kenneth R. Bradbury, Mark A. Borchardt, Maureen A. Muldoon
Date published: January 19, 2019
Status: Active Evaluating the risks of airborne pathogens from manure irrigation
Manure irrigation, which is the application of liquid animal manure by irrigation, is increasing. However, the risk of airborne pathogen transmission from manure to humans during spray irrigation is not well-understood. To determine how pathogens can spread using manure irrigation, LIDE measured air concentrations and risk of illness due to exposure to pathogens in the irrigation spray.
Contacts: Joel P Stokdyk, Mark Borchardt, Tucker Burch
Date published: January 18, 2019
Status: Completed Norovirus outbreak caused by a new septic system
Patrons and employees of a new restaurant were affected by acute gastroenteritis (vomiting and diarrhea); initial tests were positive for fecal contamination. Investigators utilized a unique combination of epidemiological, microbial, and hydrogeological evidence that identified a new septic system as the source of the contamination.
Contacts: Joel P Stokdyk, Mark Borchardt, Ken Bradbury, Susan Spencer
Date published: January 18, 2019
Status: Active Groundwater viruses in Minnesota drinking water wells
In Minnesota, 74% of the State’s population relies on groundwater to supply their drinking water. Outbreaks of waterborne viral illness have been associated with groundwater, and surveys show that 30 percent of drinking water wells may be contaminated. LIDE is helping the State determine the occurrence of groundwater-borne viruses and the risk of illness in Minnesota groundwater.
Contacts: Joel P Stokdyk, Mark Borchardt
Date published: March 18, 2016
About LIDE
The Laboratory for Infectious Disease and the Environment (LIDE) is an interagency collaborative effort between the U.S. Geological Survey and the U.S. Department of Agriculture-Agricultural Research Service. As a research laboratory, LIDE’s roles in research-based collaborations range from developing research questions and experimental designs to analyzing samples and interpreting data.
Contacts: Joel P Stokdyk, Mark Borchardt
Attribution: Upper Midwest Water Science Center
Date published: March 17, 2016
Status: Active Sampling and analytical capabilities
Molecular and culture analysis methods are paired with sampling capabilities across environmental matrices to address a wide range of questions and problems. LIDE collects and analyzes samples from groundwater, surface water, runoff, wastewater, sediments, soil, manure, compost, digestate, and air.
Contacts: Joel P Stokdyk, Mark Borchardt
Date published: March 16, 2016
Status: Active Real-time quantitative polymerase chain reaction (qPCR)
Quantitative polymerase chain reaction (qPCR) identifies and quantifies microorganisms in environmental samples by detecting a unique target sequence of nucleic acid (DNA or RNA).
Contacts: Joel P Stokdyk
Date published: March 15, 2016
Status: Active Quantitative microbial risk assessment (QMRA)
Quantitative microbial risk assessment (QMRA) is a tool for estimating human health risks from exposure to pathogens via food, water, air, and other environmental routes.
Contacts: Joel P Stokdyk, Tucker Burch
Pre-USGS Publications
Stokdyk, J., and Herrman, K., 2014, Short-term impacts of Frangula alnus litter on forest soil properties: Water, Air, and Soil Pollution v. 225, n. 6, p. 1-9. doi: 10.1007/s11270-014-2000-3