Reference : Nutrient utilisation and particulate organic matter changes during summer in the uppe...
Scientific journals : Article
Life sciences : Aquatic sciences & oceanology
http://hdl.handle.net/2268/90084
Nutrient utilisation and particulate organic matter changes during summer in the upper mixed layer (Ross Sea, Antarctica).
English
Catalano, Giulio [CNR Istituto Talassografico Trieste Italy > > > >]
Povero, Paolo [ > > ]
Fabiano, Mauro [ > > ]
Benedetti, Fabio [ > > ]
Goffart, Anne mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
1997
Deep-Sea Research Part I, Oceanographic Research Papers
Pergamon Press - An Imprint of Elsevier Science
44
1
97 - 112
Yes (verified by ORBi)
International
0967-0637
Oxford
United Kingdom
[en] Ross Sea ; Antartica ; nutrient utilisation ; water column stability
[en] The relationships among vertical stability, estimated nutrient utilisation and particulate organic matter in the Ross Sea are analysed from data collected during two cruises in the summers of 1987 - 88 and 1989 - 90. In the upper mixed layer (UML), identified through the vertical stability E(Z(UML)), nutrient consumption is calculated as the difference between the « diluted » nutrient value and the mean calculated from the integrated value in the UML. The nutrient utilisation ratio and E(Z(UML)) are linearly related for E(Z(UML)) < 25, whereas for values > 25, the distribution pattern is more scattered and independent of E(Z(UML)). For E(Z(UML)) > 25, utilisation values were > 4, 0.4 and 10 mmol m-3 for nitrate, phosphate and silicate, respectively. Significant relationships between nutrient depletion and both particulate organic carbon (POC) and particulate protein / particulate carbohydrate ratios (PPRT/PCHO) are found. The analysis of particulate matter distribution vs nutrient utilisation shows that the stations could be divided into two groups having different characteristics. The first group includes coastal stations, where high nutrient utilisation, POC and PPRT / PCHO are typical of areas with high production. In the second group (pelagic stations), nutrient utilisation, POC and PPRT / PCHO are lower. The vertical stability can be used to discriminate among the factors that influence primary production.
MARE
BELSPO (Belgium) ; PNRA (Itlay)
Researchers
http://hdl.handle.net/2268/90084

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