Visit us at

Diatoms of the United States is now known as Diatoms of North America.
This site has been redesigned and updated, and will be closing soon.


Many people from a number of organizations helped bring this online resource to fruition and continue to support its development.



The initial development of this web site was funded by the EPA Office of Research and Development (ORD) through the R-EMAP program and the Rocky Mountain Cooperative Ecosystem Studies Unit (RM-CESU). Funding from the US Geological Survey, National Water Quality Assessment (NAWQA) Program and RM-CESU supported several expert contributors to develop pages for over 200 species.

The site is hosted at the Institute for Arctic and Alpine Research (INSTAAR) at the University of Colorado.


Name Title & Affiliation Role with development of this website
Susan Jackson   Environmental Scientist
US EPA, Biological Criteria Program
Project Coordinator
Jo Thompson Environmental Scientist
US EPA, ORD, Mid-Continental Ecology Division
Project Officer
Karl Hermann Environmental Scientist
US EPA, Region 8
Project co-Initiator and advocate
Russell Kreis Environmental Scientist
US EPA, ORD, Large Lakes Research Station
Provided perspective on previous efforts and the need for taxonomic consistency
Steve Moulton Ecologist
US Geological Survey
Organized workshops and calls, built agency and scientific consensus, developed short and long-term plans
Donna Myers Chief, Office of Water Quality
US Geological Survey
Provided long-term vision
Don Charles Ruth Patrick Chair
Academy of Natural Sciences of Philadelphia
Involved in discussions about databases, images, and use of North American Diatom Ecological Database (NADED) names
Roger Sweets Diatomist
Indiana University
Originated the idea of a "diatom bird guide"
Ed Theriot Diatom Systematist
University of Texas
Provided feedback on diatom phylogeny and a consensus evolutionary lineage of diatoms
Jeffrey Stone Diatomist
University of Nebraska-Lincoln
Provided feedback on early wireframe prototypes, including the idea to have images and text appear upon mouse hover
Alex Wolfe Diatomist
University of Alberta
Advocated for an organizational scheme based on phylogeny
Jeff Snyder Diatomist
Bowling Green State University
Provided feedback on early wireframe prototypes, including emphasis on visual images over text


2007, 2009, 2015 North American Diatom Symposium Participants.   
Constructive feedback and criticism on project design and implementation.

2010, 2016 International Diatom Symposium Participants.  
Constructive feedback and criticism on project design and implementation.