Pregled bibliografske jedinice broj: 2438
Coastal phytoplankton response to nutrient enrichment: an experimental system
Coastal phytoplankton response to nutrient enrichment: an experimental system // Water Pollution IV. Modelling, Measuring, and Prediction / Rajar, R ; Brebbia, C. A. (ur.).
Bled, Slovenija: Computational Mechanics Publ., 1997. str. 151-160 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
CROSBI ID: 2438 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Coastal phytoplankton response to nutrient enrichment: an experimental system
Autori
Mozetič, Patricija ; Turk, Valentina ; Malej, Alenka ; Terzić, Senka ; Ahel, Marijan ; Cauwet, Gustave
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Water Pollution IV. Modelling, Measuring, and Prediction
/ Rajar, R ; Brebbia, C. A. - : Computational Mechanics Publ., 1997, 151-160
Skup
IVth International Conference on Water Pollution
Mjesto i datum
Bled, Slovenija, 20.06.1997. - 25.06.1997
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
phytoplankton; coastal waters; nutrient enrichment
Sažetak
The approach of a model system was chosen to simulate the natural nutrient status, the biological processes of the Gulf of Trieste (Adriatic Sea) and the effects of nutrient addition. Nutrient enrichment experiments were conducted in June 1994 and April 1995 to estimate the effects of different nutrient concentrations and ratios on coastal plankton dynamics and the production of organic matter. Natural phytoplankton were incubated in situ with the addition of four artificial nutrient sources (phosphate, nitrogen as nitrate+ammonium, silicate, a mixture of all nutrients) and natural nutrient sources (rain water and river water). In both experiments additions of phosphate and the mixture of all nutrients had the most profound effect on biomass increase and on production of particulate and dissolved organic matter. Bacterial biomass and production increased shortly after nutrient addition while phytoplankton passed over a 2-3 day lag phase. Size-fractionated primary production showed the largest enhancement in the >10 ľm and 2-10 ľm size fractions, while picoplanktonic cyanobacteri were outcompeted. The rates of released extracellular organic carbon (EOC) and the percentage of extracellular release (PER) were higher in the first experiment. Our results indicate that the effects on nutrients pulses depended not only on different nutrient ratio but also on the initial structure of the biotic component in the marine system.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
