Chemical determinations in sea water taken from the basins for keeping sea-birds
Helder, W. (1977). Chemical determinations in sea water taken from the basins for keeping sea-birds. Interne verslagen Nederlands Instituut voor Onderzoek der Zee, 1977(8). NIOZ: Texel. 7 pp.
Part of: Interne verslagen Nederlands Instituut voor Onderzoek der Zee. Nederlands Insituut voor Onderzoek der Zee.
In closed-system water basins, inhabited by guilletmots, fed on fish, the originally present Dutch coastal water (ca. 30 promille S) was enriched with respect to dissolved N and P ca. 10-50 times in 30-50 days, without significant harmfull effects. By using high pumping capacities and biologically active sand-beds filters 40-60% of the nitrogen introduced as food and 20-40% of P is mineralized in 30-50 days.
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