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In the framework of the VECTOR Project, biogeochemical properties and phytoplankton communities of the upper water column have been measured in three seasonal conditions at the centre of Southern Adriatic (SA). Our results, although based on few seasonal samplings, suggest a correlation between the seasonal cycles of phytoplankton and the carbonate system in SA. In consequence it confirms that shifts of carbonate system due to CO2 invasion (ocean acidification) might have great impact on the C-budget in the area.

The aim of this study was to evaluate the impact of coastal fish farms by monitoring the nutrient concentrations. High values at the cage stations provide evidence of the mariculture impact over the marine environment. The obtained results encourage the use of nutrient concentrations as a tool for the sustainable management of mariculture activities.

Physico-chemical, chemical and biological parameters collected in water column during a multidisciplinary cruise in the Gulf of Manfredonia (October 2002) are reported. Two coastal and offshore systems with different biochemical and physical characteristics were highlighted by spatial distribution of observed parameters. The coastal system is characterised by low salinity, and high ammonium and chlorophyll-a concentrations. The offshore system exhibits a well defined isopicnal gradient and high nitrate values localised below the picnocline.