Article (Scientific journals)
Nutrient utilisation and particulate organic matter changes during summer in the upper mixed layer (Ross Sea, Antarctica).
Catalano, Giulio; Povero, Paolo; Fabiano, Mauro et al.
1997In Deep-Sea Research. Part I, Oceanographic Research Papers, 44 (1), p. 97 - 112
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Keywords :
Ross Sea; Antartica; nutrient utilisation; water column stability
Abstract :
[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.
Research center :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Catalano, Giulio;  CNR Istituto Talassografico Trieste Italy
Povero, Paolo
Fabiano, Mauro
Benedetti, Fabio
Goffart, Anne  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Language :
English
Title :
Nutrient utilisation and particulate organic matter changes during summer in the upper mixed layer (Ross Sea, Antarctica).
Publication date :
1997
Journal title :
Deep-Sea Research. Part I, Oceanographic Research Papers
ISSN :
0967-0637
eISSN :
1879-0119
Publisher :
Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom
Volume :
44
Issue :
1
Pages :
97 - 112
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
PNRA (Itlay)
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since 04 May 2011

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