AlgaeBase is a database of information on algae that includes terrestrial, marine and freshwater organisms. At present, the data for the marine algae, particularly seaweeds, are the most complete. Sea-grasses are included in the database even though they are flowering plants.
The Canadian Field-Naturalist (CFN) is a journal of field biology and ecology published since 1880 by the Ottawa Field-Naturalists' Club. All issues from 2003 up to the current year are freely available. The 4 most recent issues require a subscription unless an author has paid for open access. Pre-2003 content is freely available at the Biodiversity Heritage Library.