Convention for the Protection of the Marine Environment and the Coastal Region of the Mediterranean

Policy Document
The Convention for the Protection of the Mediterranean Sea Against Pollution (the Barcelona Convention) was adopted on 16 February 1976 by the Conference of Plenipotentiaries of the Coastal States of the Mediterranean Region for the Protection of the Mediterranean Sea, held in Barcelona.

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Related indicators

Chlorophyll in transitional, coastal and marine waters Chlorophyll in transitional, coastal and marine waters This indicator illustrates the levels and trends in mean summer surface concentrations of chlorophyll-a (microgram/l) in the regional seas of Europe.
Nutrients in transitional, coastal and marine waters Nutrients in transitional, coastal and marine waters This indicator illustrates the levels and trends in winter means of dissolved inorganic nitrogen (nitrate + nitrite + ammonium), oxidised nitrogen (nitrate + nitrite) and phosphate concentrations (micromol/l) in the regional seas of Europe.
Chlorophyll in transitional, coastal and marine waters Chlorophyll in transitional, coastal and marine waters The indicator shows 1) annual mean summer surface concentrations (microgram/l), 2) classification of concentration levels (i.e. low, moderate, high) and 3) trends in mean summer surface concentrations of chlorophyll-a (microgram/l) in the regional seas of Europe. Summer period is: June to September for stations north of latitude 59 degrees in the Baltic Sea (Gulf of Bothnia and Gulf of Finland)  May to September for all other stations  The used regional and subregional seas of Europe are in line with the geographical regions and sub-regions specified in the Marine Strategy Framework Directive (MSFD).  Other European Seas (Icelandic Sea, The Norwegian Sea, the Barents Sea and the White Sea) are not covered in this indicator due to current lack of data.
Nutrients in transitional, coastal and marine waters Nutrients in transitional, coastal and marine waters The indicator shows 1) annual winter concentrations (micromol/l); 2) classification of concentration levels (i.e. low, moderate, high) and 3) trends in winter oxidised nitrogen (nitrate + nitrite) and phosphate concentration (micromol/l)in the regional seas of Europe.  Levels and trends of winter concentrations of dissolved inorganic nutrients are used for this indicator, as it is assumed that winter concentrations are not significantly reduced due to uptake by primary producers. The winter period is defined as follows: January, February and March for stations east of longitude 15 degrees (Bornholm) in the Baltic Sea  January and February for all other stations. The used regional and subregional seas of Europe are in line with the geographical regions and sub-regions specified in the Marine Strategy Framework Directive (MSFD).  Other European Seas (Icelandic Sea, The Norwegian Sea, the Barents Sea and the White Sea) are not covered in this indicator due to current lack of data. 
Status of marine fish stocks Status of marine fish stocks The indicator tracks the ratio of the number of over-fished stocks to the total number of commercial stocks per fishing area in European seas. Fish species rarely reproduce randomly with con-species throughout their geographical range, but form a series of stocks that are reproductively isolated in space and time. Cod for instance form a stock in the North Sea and another one in the Iceland area. These are isolated from each other and one can potentially be fished out while the other is thriving. European eel is an example of an extreme situation where there is only one stock as all mature eel migrate to the Sargasso Sea to spawn in random mixture with each other.  It should be noted that in the Northeast Atlantic area stocks are generally defined based on biological criteria and knowledge of population migration, mixing and spawning areas, while in the Mediterranean due to lack of biological knowledge, stocks are defined largely by area and not in general on the basis of well established biological knowledge on population units.   Commercial stocks are the stocks of economic importance on which the fishing effort is focused upon in each area aiming at a profit, i.e. a subset of exploited stocks. It is a broader term encompassing target species, by-catches and industrial species that are of economic importance to the market. Overfished stocks are stocks outside safe biological limits Safe stocks are stocks inside safe biological limits Non-assessed stocks are stocks for which no assessment has been carried out. The indicator also contains information on: 1. Numbers of commercial, assessed and over-fished stocks by sea area; 2. The state of commercial stocks (over-fished stocks per area), safe stocks, stocks for which an assessment has not been carried out. 3. Fish catch in specific seas from assessed and unassessed stocks. 4. Status of stocks by species and seas.

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For references, please go to https://www.eea.europa.eu/policy-documents/convention-for-the-p...f-the-mediterranean or scan the QR code.

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