Eutrophication (EO 5)

Human-induced eutrophication is prevented, especially adverse effects thereof, such as losses in biodiversity, ecosystem degradation, harmful algal blooms and oxygen deficiency in bottom waters.

Ecological Objective 5 (EO5) Definition:

Human-induced eutrophication is prevented, especially adverse effects thereof, such as losses in biodiversity, ecosystem degradation, harmful algal blooms and oxygen deficiency in bottom waters.

Key Messages:

  • The available data show that assessment is possible. Key nutrient concentrations are within characteristic ranges for coastal areas and in line with the main processes undergoing in concerned interested area. The Eastern Mediterranean Sea (EMS) is still the most oligotrophic area of the whole Mediterranean basin, and the largest phosphorus-limited body of water in the global ocean. [...]
  • A more comprehensive set of data is required at coastal hotspots in order to assess accurately trends for nutrients. Significant trends need to be detected from long time series that are able to capture nutrient concentrations changes in coastal waters [...]
  • Whilst data is available through the MEDPOL database, and relevant data is also available through EEA, EMODnet-Chemistry and other information sources, priority should be given to ensure Mediterranean countries regularly report quality assured nutrient monitoring data in line with IMAP.
  • The IMAP assessment criteria for eutrophication based on Common Indicator 14 (Chlorophyll a concentration in the water column) are applicable and confirm the main status of eutrophication in the coastal area. [...]

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