ARCA è l'archivio istituzionale ad accesso aperto della ricerca dell'Università Ca' Foscari Venezia e nasce nel 2014 con lo scopo di raccogliere, diffondere e conservare la produzione scientifica dell'Università. Costituisce di fatto il catalogo della ricerca di Ateneo.
ARCA è un sistema Open Access: è non solo consultabile da tutti e visibile nei motori di ricerca, ma anche interoperabile con il portale cerCa. In questo modo vengono valorizzate la produzione scientifica dell'Ateneo e la visibilità dei ricercatori.

The estimation of the gross primary production (GPP) through measurements of a conserved element, such us phosphorus (P) in macroalgal biomass, surface sediment and settled particulate material (SPM) is proposed. The central Venice lagoon is covered by a biomass ranging from 1 to 20 kg m(-2), wet wt, with macroalgae accounting for almost the whole production. The total phosphorus GPP (P-GPP) was more than sixfold the P involved in the net primary production (P-NPP). The GPP also provided the fluxes of nutrients at the water-sediment interface and allowed the estimation of losses of nonconserved elements, such as nitrogen (N) and carbon (C), by denitrification and respiration-decomposition processes, respectively. In the Venice lagoon the Nand C losses were evaluated to be 51% and 63%, respectively, of the nutrients involved in the total GPP. From a comparison of these results with the total nutrient loadings entering the lagoon through external inputs, it was suggested that the sea strongly supported the GPP occurring in the lagoon. The release of N from the lagoon to the atmosphere was equivalent to about 4.3 times the N introduced yearly from external inputs.

The estimation of the gross primary production (GPP) through measurements of a conserved element, such us phosphorus (P) in macroalgal biomass, surface sediment and settled particulate material (SPM) is proposed. The central Venice lagoon is covered by a biomass ranging from 1 to 20 kg m(-2), wet wt, with macroalgae accounting for almost the whole production. The total phosphorus GPP (P-GPP) was more than sixfold the P involved in the net primary production (P-NPP). The GPP also provided the fluxes of nutrients at the water-sediment interface and allowed the estimation of losses of nonconserved elements, such as nitrogen (N) and carbon (C), by denitrification and respiration-decomposition processes, respectively. In the Venice lagoon the Nand C losses were evaluated to be 51% and 63%, respectively, of the nutrients involved in the total GPP. From a comparison of these results with the total nutrient loadings entering the lagoon through external inputs, it was suggested that the sea strongly supported the GPP occurring in the lagoon. The release of N from the lagoon to the atmosphere was equivalent to about 4.3 times the N introduced yearly from external inputs.

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