Lo Stato trofico dello stagno di Casaraccio (Sardegna settentrionale)

Monthly change of chemical and biological features in coastal brackish pond of Casaraccio have been investigated. Peak concentrations of total phosphorus (15 mg P m-3), nitrate nitrogen (50 mg N m-3) and ammonia nitrogen (130 mg N m-3) are low. Peak values of chlorophyll a (4 mg m-3) and average biomass macrophytes of the pond (120 g m-2) are also low, in spite of the fact that the crop of benthic macrophytes are very high (400 g m-2) in some parts of the pond. The resuls of this research represent a starting point for the evaluation of future possible changes which may derive by the implementation of new industrial aquaculture development.