Taxon Contributors
Contributors produce comprehensive documentation on diatoms, leading to consistent and correct taxonomy.
Diatoms of North America provides analysts, academics and managers with tools for diatom taxonomy, nomenclature and ecology
Federal, tribal, state and local agencies use Diatoms of North America to monitor water quality and comply with the Clean Water Act
We aim to create a comprehensive diatom flora, accessible to everyone
Over 160 contributing taxonomists, from students-in-training to seasoned professionals, collaborate in producing an ambitious flora
Become a taxon contributor Learn more
Diatoms of North America is a collaborative work in progress, growing and changing as science advances.
Taxa by Morphology
New to diatoms? Jump into diatom identification using the visual key.
Editorial Review Board
Using diatoms in assessment? Specify the use of Diatoms of North America in contracts and task agreements.
What are Diatoms?
Diatoms are single-celled algae that live nearly everywhere there is water - streams, ponds, lakes, oceans, and even soils.
For practitioners
Taxon
Identification Guide
Genera
Classification information, citations, links and species listings for 179 genera completed to date.
Species
Identification guides, original descriptions, citations, autecological information and more for 1046 species and growing.
We encourage new contributors to submit taxon pages.
This project depends on many people to document the diverse diatom flora of streams, rivers, wetlands, lakes, springs, soils, estuaries and coastal zones.
Recent News & Projects
30 September 2022
Following on the North American Diatom Symposium
26th North American Diatom Symposium This year's gathering included the traditional posters, presentations, field trip, auction, and scum run, and...
30 September 2022
WEBINAR: Didymo outbreaks in Minnesota's North Shore streams
The diatom Didymosphenia geminata, also called "didymo" for short, has long been considered a cold-water, low nutrient indicator found in low...
06 September 2022
Diatom Web Academy 2022
Announcing the fall series... Sessions are recorded and can be accessed for later viewing. You are invited to join us, wherever you may be, from...
Diatoms of North America has been developed in part with the generous funding and support of US EPA, USGS, the Institute of Arctic and Alpine Research at University of Colorado Boulder and other organizations.
