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- W14897838 abstract "We examined nutrient variability in the sediments, interstitial and lagoon waters at 15 stations in the central, most-polluted part of the Venice Lagoon, with 7 cruises between February 1984 and June 1985. Strong concentration gradients were observed, decreasing from the internal border of the lagoon towards the sea. Total phosphorus and total nitrogen in the sediments ranged from 261 to 599 μg g-1 and from 200 to 1800 μg g-1, respectively. The total inorganic nitrogen (TIN), mainly ammonium, and reactive phosphorus (RP) in the interstitial waters varied from 4 to 1800 and from 0.1 to 38 μg-at l-1, respectively. The most marked changes, both in time and space, were found in the overlying waters (TIN from 0.7 to 106 and RP from 0.03 to 15.7 μg-at l-1). The higher concentrations of TIN were observed in October and February, whereas the higher RP concentrations appeared in June and October. The maximum phytoplankton biomass occurred in April and June in correspondence with lower nitrogen concentrations. External nutrient contributions, biological recycling and tidal mixing determine high nutrient concentration variability in the Venice Lagoon waters. The results suggest that nutrient release from the sediments can additionally influence this variability, particularly during warm seasons, when maximum rates were measured (up to 23.5 and 1.58 μg-at m-2 d-1 for TIN and RP, respectively)." @default.
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- W14897838 date "1986-01-01" @default.
- W14897838 modified "2023-09-25" @default.
- W14897838 title "SPACE AND TIME VARIABILITY OF NUTRIENTS IN THE VENICE LAGOON" @default.
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- W14897838 doi "https://doi.org/10.1016/b978-0-12-761890-6.50024-1" @default.
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