Phycological Society of America
Scientific organization that promotes phycology, the study of algae, and fosters phycological research and education.
www.psaalgae.org
International Society for Diatom Research
Working to promote, for the benefit and education of the public, all branches of diatom studies throughout the world.
www.isdr.org
British Phycological Society (BSP)
Working to advance education by the encouragement and pursuit of all aspects of the study of algae.
www.brphycsoc.org
International Fossil Algae Association
Nonprofit organization interested in promoting the study of fossil algae: taxonomy, morphology, biology, biostratigraphy, and paleo-ecology.
members.tripod.com/bruno.granier