http://www.cnr.it/ontology/cnr/individuo/prodotto/ID49449

Microbial loop malfunctioning in the annual sea ice at Terra Nova Bay (Antarctica) (Articolo in rivista)

Type

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

Label

Microbial loop malfunctioning in the annual sea ice at Terra Nova Bay (Antarctica) (Articolo in rivista) (literal)

Anno

2009-01-01T00:00:00+01:00 (literal)

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

10.1007/s00300-008-0539-4 (literal)

Alternative label

Pusceddu A. (1); Dell'Anno A. (1); Vezzulli L. (2); Fabiano M. (2); Saggiomo V. (3); Cozzi S. (4); Catalano G. (4); Guglielmo L. (5) (2009)
Microbial loop malfunctioning in the annual sea ice at Terra Nova Bay (Antarctica)
in Polar biology (Print); Springer-Verlag, Berlin (Germania)
(literal)

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

Pusceddu A. (1); Dell'Anno A. (1); Vezzulli L. (2); Fabiano M. (2); Saggiomo V. (3); Cozzi S. (4); Catalano G. (4); Guglielmo L. (5) (literal)

Pagina inizio

337 (literal)

Pagina fine

346 (literal)

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

DOI: 10.1007/s00300-008-0539-4 IF=1.734 (literal)

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

http://www.springerlink.com/content/1432-2056/?p=aa08aa53c9a34d2fbddf064d77733d91&pi=0 (literal)

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

32 (literal)

Rivista

Polar biology (Rivista)

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

10 (literal)

Note

Google Scholar (literal)
ISI Web of Science (WOS) (literal)

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

(1) Department of Marine Science, Polytechnic University of Marche, via Brecce Bianche, 60131 Ancona, Italy (2) Department for the Study of the Territory and its Resources, University of Genoa, Corso Europa 26, 16100 Genoa, Italy (3) Stazione Zoologica Anton Dohrn, Villa Comunale I, 80100 Naples, Italy (4) Istituto di Scienze Marine, Sezione di Trieste, Consiglio Nazionale delle Ricerche, Viale Romolo Gessi 2, 34123 Trieste, Italy (5) Dipartimento di Biologia Animale ed Ecologia Marina, Università di Messina, Salita Sperone 31, 98166 Messina, Italy (literal)

Titolo

Microbial loop malfunctioning in the annual sea ice at Terra Nova Bay (Antarctica) (literal)

Abstract

We investigated organic carbon quantity and biochemical composition, prokaryotic abundance, biomass and carbon production in the annual and platelet sea ice of Terra Nova Bay (Antarctica), as well as the downward fluxes of organic matter released by melting ice during early spring. Huge amounts of biopolymeric C accumulated in the bottom layer of the ice column concomitantly with the early spring increase in sympagic algal biomass. Such organic material, mostly accounted for by autotrophic biomass, was characterised by a high food quality and was rapidly exported to the sea bottom during sea ice melting. Prokaryote abundance and extracellular enzymatic activities for amino-peptidase activity) were extremely high, indicating high rates of organic C degradation in the bottom sea ice. Despite this, prokaryote C production values were very low, suggesting that most of the degraded organic C was not channelled into prokaryote biomass. In the platelet ice, we found similar organic C concentrations, prokaryote abundance and biomass values and even higher extracellular enzymatic activities, but values of prokaryote C production were up to three orders of magnitude higher than in the intact bottom sea ice. Additional field and laboratory experiments revealed that the dissolved organic material derived from algae accumulating in the bottom sea ice significantly reduced prokaryote C production, suggesting the presence of a potential allopathic control of sympagic algae on prokaryote growth. (literal)

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