Diatom identification guide & ecological resource

for water resource managers, ecologists, taxonomists, analysts, systematists, students, and the public.

We aim to provide everyone with accurate information about diatoms of the United States.


Expert contributors are submitting text and images for freshwater genera and North American species, including taxonomic and ecological information.


Diatom "bird guides" are included for all taxa (examples to the right). For many species, environmental response plots and geographic distribution maps are included.


Our editorial review board is ensuring the scientific merit of each submission and directing site development.

Navicula piercei

Diadesmis

GENERA
146 Completed
23 Underway
169 TOTAL
SPECIES
661 Completed
125 Underway
786 TOTAL

Getting Started

About this website

What are diatoms?

Identify your taxa


Special News

25 March, 2011

Information for contributors


News

01 December, 2014

Okeechobee or Okoboji? An Everglades Student’s Corny Tale

29 August, 2014

Planning for the future of Diatoms of the United States

More news...


Projects

Diatoms of North-Central Pennsylvania

Algal biodiversity in Great Smoky Mountains National Park

Atmospheric deposition of nitrogen and its effects on diatoms

More projects...