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Joel P Stokdyk

Joel Stokdyk is a Research Biologist with the Laboratory for Infectious Disease and the Environment (LIDE) with the Upper Midwest Water Science Center.

RESEARCH SUMMARY
I study the occurrence, fate and transport, and health effects of pathogens in the environment at LIDE. My research includes analysis of viruses, bacteria, and protozoa to characterize pathogen occurrence combined with microbial source tracking to identify pathogen sources. Studies address public health and resource management aspects of groundwater and surface water by assessing the factors that contribute to contamination and by characterizing relationships among pathogens, microbial indicators, and human health risk. Projects include collaboration with public agencies and other researchers to study public and private well water, recreational water, drinking water, and other environmental matrices.

EXPERTISE
Analysis of human and agricultural zoonotic pathogens and microbial source tracking markers in environmental matrices
Quantitative polymerase chain reaction (qPCR) and associated lab quality control
Large-volume sampling techniques for analysis of viruses and bacteria in water
Enteric viral, bacterial, and protozoan pathogens in groundwater

Education and Certifications

  • 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

Science and Products

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U.S. Geological Survey science strategy for highly pathogenic avian influenza in wildlife and the environment (2016–2020) U.S. Geological Survey science strategy for highly pathogenic avian influenza in wildlife and the environment (2016–2020)

Introduction Through the Science Strategy for Highly Pathogenic Avian Influenza (HPAI) in Wildlife and the Environment, the USGS will assess avian influenza (AI) dynamics in an ecological context to inform decisions made by resource managers and policymakers from the local to national level. Through collection of unbiased scientific information on the ecology of AI viruses and wildlife...
Authors
M. Camille Harris, John M. Pearce, Diann J. Prosser, C. LeAnn White, A. Keith Miles, Jonathan M. Sleeman, Christopher J. Brand, James P. Cronin, Susan De La Cruz, Christine L. Densmore, Thomas W. Doyle, Robert J. Dusek, Joseph P. Fleskes, Paul L. Flint, Gerald F. Guala, Jeffrey S. Hall, Laura E. Hubbard, Randall J. Hunt, S. Ip, Rachel A. Katz, Kevin W. Laurent, Mark P. Miller, Mark D. Munn, Andrew M. Ramey, Kevin D. Richards, Robin E. Russell, Joel P. Stokdyk, John Y. Takekawa, Daniel P. Walsh
By
Ecosystems Mission Area, Science Analytics and Synthesis (SAS) Program, Science Synthesis, Analysis, and Research Program, Alaska Science Center, National Wildlife Health Center, Wetland and Aquatic Research Center , Laboratory for Infectious Disease and the Environment

Determining the 95% limit of detection for waterborne pathogen analyses from primary concentration to qPCR Determining the 95% limit of detection for waterborne pathogen analyses from primary concentration to qPCR

The limit of detection (LOD) for qPCR-based analyses is not consistently defined or determined in studies on waterborne pathogens. Moreover, the LODs reported often reflect the qPCR assay alone rather than the entire sample process. Our objective was to develop an approach to determine the 95% LOD (lowest concentration at which 95% of positive samples are detected) for the entire process...
Authors
Joel P. Stokdyk, Aaron D. Firnstahl, Susan K. Spencer, Tucker R Burch, Mark A. Borchardt
By
Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center, Laboratory for Infectious Disease and the Environment

Non-USGS Publications**

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
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

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

Science and Products

No Result Found
No results found.
Filter Total Items: 26

U.S. Geological Survey science strategy for highly pathogenic avian influenza in wildlife and the environment (2016–2020) U.S. Geological Survey science strategy for highly pathogenic avian influenza in wildlife and the environment (2016–2020)

Introduction Through the Science Strategy for Highly Pathogenic Avian Influenza (HPAI) in Wildlife and the Environment, the USGS will assess avian influenza (AI) dynamics in an ecological context to inform decisions made by resource managers and policymakers from the local to national level. Through collection of unbiased scientific information on the ecology of AI viruses and wildlife...
Authors
M. Camille Harris, John M. Pearce, Diann J. Prosser, C. LeAnn White, A. Keith Miles, Jonathan M. Sleeman, Christopher J. Brand, James P. Cronin, Susan De La Cruz, Christine L. Densmore, Thomas W. Doyle, Robert J. Dusek, Joseph P. Fleskes, Paul L. Flint, Gerald F. Guala, Jeffrey S. Hall, Laura E. Hubbard, Randall J. Hunt, S. Ip, Rachel A. Katz, Kevin W. Laurent, Mark P. Miller, Mark D. Munn, Andrew M. Ramey, Kevin D. Richards, Robin E. Russell, Joel P. Stokdyk, John Y. Takekawa, Daniel P. Walsh
By
Ecosystems Mission Area, Science Analytics and Synthesis (SAS) Program, Science Synthesis, Analysis, and Research Program, Alaska Science Center, National Wildlife Health Center, Wetland and Aquatic Research Center , Laboratory for Infectious Disease and the Environment

Determining the 95% limit of detection for waterborne pathogen analyses from primary concentration to qPCR Determining the 95% limit of detection for waterborne pathogen analyses from primary concentration to qPCR

The limit of detection (LOD) for qPCR-based analyses is not consistently defined or determined in studies on waterborne pathogens. Moreover, the LODs reported often reflect the qPCR assay alone rather than the entire sample process. Our objective was to develop an approach to determine the 95% LOD (lowest concentration at which 95% of positive samples are detected) for the entire process...
Authors
Joel P. Stokdyk, Aaron D. Firnstahl, Susan K. Spencer, Tucker R Burch, Mark A. Borchardt
By
Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center, Laboratory for Infectious Disease and the Environment

Non-USGS Publications**

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
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

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

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