Threatened species of Phaeophyta

The Phaeophyta are almost entirely marine, frequently dominating rocky shores in cold and temperate waters throughout the world; a few species are found in in soil and freshwaters. The taxonomy is unclear with different treatments according to author. Some place the Phaeophyta in the Heterokontophyta, and other in the larger grouping of Phytophyta (algae).

1. Threatened species of Phycophyta
2. Threatened species of marine algae
3. Threatened species of Heterokontophyta

1. Threatened species of Fucaceae
2. Threatened species of Ectocarpaceae
3. Threatened species of Dictyotaceae
4. Threatened species of Cystoseiraceae
5. Threatened species of Cyanidiophyceae

1. Threatened kelp beds

1. Decreasing population of seaweeds