http://www.cnr.it/ontology/cnr/individuo/prodotto/ID48947

Plankton community structure and dynamics versus physical structure from Terra Nova Bay to Ross Ice Shelf (Antarctica) (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Plankton community structure and dynamics versus physical structure from Terra Nova Bay to Ross Ice Shelf (Antarctica) (Articolo in rivista) (literal)

Anno

2005-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/j.jmarsys.2004.05.030 (literal)

Alternative label

Fonda Umani S. (1) (2); Monti M. (1); Bergamasco A. (3); Cabrini M. (1); De Vittor C. (1); Burba N. (1); Del Negro P. (1) (2005)
Plankton community structure and dynamics versus physical structure from Terra Nova Bay to Ross Ice Shelf (Antarctica)
in Journal of marine systems
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Fonda Umani S. (1) (2); Monti M. (1); Bergamasco A. (3); Cabrini M. (1); De Vittor C. (1); Burba N. (1); Del Negro P. (1) (literal)

Pagina inizio

31 (literal)

Pagina fine

46 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

55 (literal)

Rivista

Journal of marine systems (Rivista)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

(1) Laboratorio di Biologia Marina, v. A. Piccard 54, I34010 Trieste, Italy; (2) Department of Biology, University of Trieste, v. Giorgeri 10, 134127 Trieste, Italy; (3) CNR-ISMAR, S. Polo 1364, I30122 Venezia, Italy (literal)

Titolo

Plankton community structure and dynamics versus physical structure from Terra Nova Bay to Ross Ice Shelf (Antarctica) (literal)

Abstract

During the austral summer 1997/1998, an oceanographic cruise was carried out on a large-scale grid in the Ross Sea. In this contribution, we focused our attention on the coastal area from the Terra Nova Bay (TBN) polynya to the eastern edge of the Ross Ice Shelf (RIS). We analyzed picoplankton, nanoplankton and microplankton fractions, with particular regard to heterotrophy versus autotrophy and the size-based partitioning of living carbon. Plankton dynamics were closely associated with hydrological features: (1) diatom blooms were confined to the ice-edge TNB polynya, (2) Phaeocystis dominance was confined to the lower salinity surface waters, diluted by the RIS and the Drygalsky Ice Tongue, (3) heterotrophic communities prevailed in the warmer surface waters of the Drygalsky basin, where most of the living carbon was associated with tintinnids (namely Codonellopsis gaussi). Phaeocystis distribution suggested that low salinities may be the main driving force in enhancing their development. In the deepest layers, heterotrophic communities were dominated by bacteria. Along the transect, we did not find evidence of any unique and continuous temporal evolution of the ice melting process, freshening of the water, and warming of the surface layer that trigger summer algal blooms and plankton dynamics. The physical features, which, in turn, mainly depend on the past history of ice retreating, seem to control the development of the planktonic system which showed a patchy distribution, shifting from an autotrophic community of the ice-edge area (TNB polynya) to a heterotrophic community of the warmer surface layer in the Drygalsky basin, which was ice-free for a longer period before the sampling. (literal)

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