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Bacillariophyta (Diatoms) is a phylum of heterokont. There are 7129 species of Diatoms, in 547 genera and 92 families. It includes groups like Fragilariophyceae, Coscinodiscophyceae, and Mediophyceae. Dead Diatoms form siliceous oozes.

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  • URI: http://purl.obolibrary.org/obo/ENVO_02000044
  • Definition: Siliceous ooze is a marine sediment composed of the debris of plankton with silica shells, such as diatoms and radiolaria. This ooze is limited to areas with high biological productivity, such as the polar oceans, and upwelling zones near the equator. The least common type of sediment, it covers only 15% of the ocean floor. It accumulates at a slower rate than calcareous ooze: 0.2-1 cm / 1000 yr.
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EOL has data for 22 attributes, including:

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Diatom Habitats

The environments in which many diatoms species are known to live. Select an environment to see its diatoms species checklist.