Original URL: http://www.indiana.edu/%7Ediatom/diatom.html

Diatom Home Page

Biology Department, Indiana University

Welcome to the diatom home page, intended as a central Web resource for those interested in, or actively conducting research on, the diatoms and related algae. This page contains information of general interest to diatomists and other phycologists along with links to other useful Internet resources. Most of the information is downloaded from postings to various LISTSERVers. Please contact P. Roger Sweets  with information or links you would like to share with the community. I welcome all contributions.

Last updated: June 23, 1998



The image above is a scanning electron micrograph (JPEG) of Cyclotella stelligera.
Diatoms are unicellular algae generally placed in the family Bacillariophyceae. The cell walls of these organisms are made of silica, and the varied shapes and beautiful ornamentation of these walls made the study of the diatoms and related siliceous organisms a favored pursuit of the microscopical pioneers. The cell wall is also one of the major reasons why these algae are today a favorite tool of modern ecological and evolutionary researchers, because the fossils are often well preserved in lake and marine systems. And that is, again, a small part of the story! Check the other Web sites below to learn more!

However, sample these JPEG pictures to whet your appetite.

Cyclotella Pinnularia Epithemia 

The Mystery Diatom

This Mystery Diatom is growing mold, let me know if you'd like to contribute the next one! To see a bunch of electron micrographs (GIFs) of the now 3year old Mystery Diatom, go to the Mystery Diatom Page 

Ultimate Diatom Web sites

Do not miss these!

Bowling Green State University Algal Images is a Web site with lots of great images. Check it out!

The Great Lakes Diatom Web Site from the University of Michigan.  The future of diatom reference works.

The Diatom Collection of the California Academy of Sciences has sample locations, taxon collection, images, and a large diatom literature database on the WWW.  A 'must' stop for diatomists.

The beginning of the fight for the hearts, minds, and codes of all diatomists - DIATCODE: A coded checklist of Diatom names (developed jointly by the ECRC and the Natural History Museum- UK).  Downloadable.

Museum Collections and Phycological Web sites

Cyanosite: bibliography, links, images of our favorite ex-algae the Cyanobacteria (Purdue University)
Smithsonian Institution's Algal Web Page is online. 

Travel in cyberspace to Japan's Tsukuba University for images from many algal groups.

Excellent images and introductory material is offered by GEK, Inc. Hunt around for the video offerings of phagocytosis and other cool stuff as well.

Dr. R. Chapman's lab at LSU is now posting algal images on the Web.

If you're tired of the diatoms, check out Protist Image Data from the University of Montreal.

Buckman Laboratories has some downloadable photomicrographs of algae and other organisms.

The University of California Herbarium has a comprehensive catalogue of the Indian Ocean Benthic Algae.
Also, the all around great Berkeley museum site has a searchable catalog for microfossil type specimens including diatoms and other protists (as well as some images).
AND, a demonstration of the Index Nominum Algarum and a list of Porphyra names (Richard Moe)

Mike Guiry's  Seaweed page has much, much mre:  searchable databases of literature, people, and taxonomic names.  A must link.

The Woods Hole Marine Biology group even has...Yikes! A Cladophora Web page!

Nothing like the Toxic Cyanobacteria Home Page to scare the kids...

Bengt Karlsson has announced the Checklist of phytoplankton from the Skagerrak-Kattegat (that's in the North Sea). Includes distribution info.

Chris Jeffries has recommended his Microscopes and Microscopy site to diatomists and phycologists browsing around.

Ed Drew's Research Shed is a fun link.

Cell biology and algal research at the Melkonian Laboratory, Botany Institute, University of Cologne

The Provasoli-Guillard National Center for Culture of Marine Phytoplankton offers information for those who feel the need to culture algae.

North East Pacific Culture Collection

Check out the Green Plant Phylogeny Research Coordination Group (GPPRCG) if you would like to coordinate with others chasing their phylogenetic dreams.

For other (non-diatom) museum holdings, see the many other great ecological home pages listed on the paleolimnology page;
transfer to the California State BioWeb, perhaps the best biological web server;
visit the Tree of Life;
or try the List of Internet sites for Botanists.


A listing of announcements as posted to the LISTSERVs


The Diatom Paleolimnology Data Cooperative (DPDC)
The NOAA Paleoclimatology Program has sponsored the creation of a diatom paleolimnology data cooperative similar to the databases already in existence or bring formed for other proxies such as pollen, tree rings, macrofossils, corals, etc.  It is the belief of NOAA and the DPDC creators that the cooperative will be an effective tool for paleoecologists, paleoclimatologists, and diatomists by disseminating information, promoting new data syntheses, planning new investigations, efficient use of data, and archiving data in a central source, among other uses.
This database exists and we are ready to accept the contribution of your published data!  Please visit the DPDC web page to learn more and inform the organizers of data you can contribute!


15th NORTH AMERICAN DIATOM SYMPOSIUM, 22 to 25 September 1999 at the Pingree Park Campus of Colorado State University.

The Second European Phycological Congress (EPC 2) and the 8th International Conference on Applied Algology
Montecatini Terme (Italy), the EPC 2 in September 1999.


Organizations & Journals

Joining the International Diatom Society in the U.S.A. or in Canada
The Phycological Society of America weighs in with their new page.
  A searchable database of recent articles is available on Mike Guiry's Seaweed page.
  The Journal of Phycology (some readable issues).
And the British Phycological Society has a new page as well (has issues of The Phycologist)!
Internation Association of Limnogeology
The journal Phycological Research has its own page (Japanese Phycological Society)
North American Benthological Society
North American Lake Management Society
UNESCO's IOC has a Global Directory of Marine Scientists


Graduate Studies


The DIATOM-L listserv is a forum for discussion of all matters diatomaceous or microscopically siliceous. Subscribe at listserv@listserv.indiana.edu
Here is a list (with EMAIL addresses) of subscribers to DIATOM-L.
View some common LISTSERV commands.
You can search an archive of DIATOM-L.

The ALGAE-L listserv offers discussions of all things phycological.
Subscribe at LISTSERV@LISTSERV.HEA.IE or try Mike Guiry's algal WWW page.

The PSAlist is sponsored by the Phycological Society of America. Subscribe at listserv@yuma.acns.colostate.edu

There is also a general listserver for lakes: LAKES-L. Subscribe at MAJORDOMO@BADGER.STATE.WI.US

There is a Web page that describes the PHYCOTOXINS mailing list. Subscribe at Lists@scotia.dfo.ca

Discussions, Literature, and Other Tidbits

From the discussion lists:

New stuff!

Blasts from the past!

Literature and Bibliographies

Other fascinating information

Jump back to the Paleolimnology Page 

That last picture was pretty blurry so here are the same folks plus some others in the glory days of PIRLA! Bonus, I am not in it!

The earlier pictures of me with John, Keith, & RussHedy & Ed and Hannelore can still be viewed...
Oops, almost forgot... the answer to the mystery diatom!

 ( Internet Resources )

Last updated: June 23, 1998 URL: http://www.indiana.edu/~diatom/diatom.html Page design and comments: P. Roger Sweets Copyright 1995, The Trustees of Indiana University