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.

Gomphoneis eriense var. apiculata

Pinnularia

GENERA
145 Completed
23 Underway
168 TOTAL
SPECIES
643 Completed
116 Underway
759 TOTAL

Getting Started

About this website

What are diatoms?

Identify your taxa


Special News

25 March, 2011

Information for contributors


News

29 August, 2014

Planning for the future of Diatoms of the United States

29 August, 2014

Prioritization of taxa for funding

More news...


Projects

Atmospheric deposition of nitrogen and its effects on diatoms

Ecology and Systematics of Diatoms course, 2013

Diatoms from the Crown of the Continent

More projects...