Ecosystem overviews

Celtic Seas Ecoregion

Pressure: Nutrient and organic enrichment

The urbanization of coastal areas is associated with nutrient releases and related pressures on the marine environment, e.g. from waste-water treatment plants or from economic activities.

​​​​​​​​​​​​​​​​​​​​​​​​The most important sources contributing to eutrophication in the Celtic Seas ecoregion are agriculture, atmospheric deposition, urban waste water, industry, and aquaculture. The major sources of nitrogen and phosphorous input in the environment are diffuse losses (agriculture and atmospheric deposition) and sewage treatment works. Atmospheric deposition of nitrogen is estimated to provide about one-third of all inputs of nitrogen. A major contribution to atmospheric deposition, and therefore to the overall input of nitrogen to the environment, is emissions from shipping. In the Celtic Seas ecoregion, eutrophication is restricted to inlets, estuaries, and harbours, in particular in areas of higher population densities and intensive agricultural activities.​​

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Celtic Seas Ecoregion

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