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This paper describes the PREI (Posidonia oceanica Rapid Easy Index), a method used to assess the ecological status of seawater along Mediterranean French coasts. The PREI was drawn up according to the requirements of the Water Framework Directive (WFD 2000/60/EC) and was tested on 24 and 18 stations in PACA (Provence-Alpes-Côtes d’Azur) and Corsica, respectively. The PREI is based on five metrics:...
Primary production of Posidonia oceanica meadows was estimated at two sites in the Mediterranean basin (Marseilles, France and Ischia, Italy), in the 10 to 20 metre depth range. At the five stations studied, foliar production (blade + sheath) ranged from 67.7 to 146.6 g C m -2 yr -1 and rhizome production from 8.2 to 18.0 g C m -2 yr -1 . Based...
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