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In coastal-near areas macroalgae constitute an important part of the primary producers, and besides producing large quantities of oxygen, the algae also produce carbon which forms part of the marine nutrient cycle. The large coastal vegetation areas moreover function as important foraging and growth areas for several animal and fish species. Macroalgal diversity, composition, depth distribution and density are included as monitoring parameters in the Danish national aquatic monitoring programme. For several years the monitoring programme has been implemented at a number of coastal-near localities and selected stone reefs. In addition, we have participated in vegetation investigations along the Greenland east coast.
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