This is further elaborated on in Chapter 4. For example, kelp forests are key habitats along the Atlantic coast, forming dense underwater forests that provide shelter, nursery grounds and food sources for hundreds of habitat-specific species. This myriad of organisms provides essential ecosystem services such as fish biomass production, areas highly valued for recreation, along with carbon fixation and sequestration (Fig. Other Nordic key habitats include seagrass meadows, seaweed beds, mussel beds and soft sediment habitats.