Red List of Baltic Sea Underwater Biotopes, Habitats and Biotope Complexes

The Red List assessment identifies biotopes, habitats and biotope complexes that are under threat of collapse. The threat is assesed based on decline in quantity or quality of the biotope. The Red List criteria identify threshold values for the decline and places the biotope in a threat category.

The Red List criteria and categories are explained in detail in the 
Red List of Baltic Sea underwater biotopes, habitats and biotope complexes report (BSEP 138).