Biogenic Habitat

Biogenic habitat is structure built or maintained by living organisms rather than by physical processes, giving other species shelter, attachment, and feeding surface. Examples include coral reefs, oyster and mussel beds, seagrass meadows, kelp forests, maerl beds, and polychaete reefs. These ecosystem engineers raise local biodiversity and productivity and often qualify as protected features, for instance Annex I reef and Posidonia seagrass habitats under the EU Habitats Directive 92/43/EEC and Natura 2000. Biogenic habitats are vulnerable to bottom-contact gear, sedimentation, and warming, and they recover slowly because the structure must be rebuilt by the organisms themselves.