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Titolo:
CO2 AVAILABILITY AFFECTS ELEMENTAL COMPOSITION (C-N-P) OF THE MARINE DIATOM SKELETONEMA-COSTATUM
Autore:
BURKHARDT S; RIEBESELL U;
Indirizzi:
ALFRED WEGENER INST POLAR & MARINE RES,HANDELSHAFEN 12 D-27570 BREMERHAVEN GERMANY
Titolo Testata:
Marine ecology. Progress series
, volume: 155, anno: 1997,
pagine: 67 - 76
SICI:
0171-8630(1997)155:<67:CAAEC(>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
TOTAL CARBON-DIOXIDE; INORGANIC CARBON; PHYTOPLANKTON GROWTH; CHEMICAL COMPOSITION; REDFIELD RATIO; CONCENTRATING MECHANISM; PARTICULATE MATTER; PLANKTONIC DIATOMS; LIMITED GROWTH; GREV CLEVE;
Keywords:
REDFIELD RATIO; CO2; PHYTOPLANKTON; MARINE DIATOMS; CELL STOICHIOMETRY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
69
Recensione:
Indirizzi per estratti:
Citazione:
S. Burkhardt e U. Riebesell, "CO2 AVAILABILITY AFFECTS ELEMENTAL COMPOSITION (C-N-P) OF THE MARINE DIATOM SKELETONEMA-COSTATUM", Marine ecology. Progress series, 155, 1997, pp. 67-76

Abstract

The effect of variable CO2 concentrations on the elemental composition (C:N:P) of marine diatoms was investigated in 2 strains of Skeletonema costatum (Grev. ) Cleve. Five or 6 concentrations of dissolved molecular carbon dioxide [CO2 (aq)], ranging from 0.5 to 39 mu mol l(-1), were applied in dilute batch cultures. In both strains, elemental ratios were clearly dependent on [CO2 (aq)]. With decreasing CO2 concentrations, a decline in C:P and N:P and an increase in C:N was observed. The close correlation between C:P or N:P and [CO2 (aq)] corresponded to a ca 45 to 65% decrease in elemental ratios from highest (greater thanor equal to 30 mu mol l(-1)) to lowest (ca 1 mu mol l(-1)) CO2 concentrations. C:N at low [CO2 (aq)] was up to 24% higher than at high [CO2(aq)]. To date, the elemental composition of marine phytoplankton hasbeen considered to be independent of CO2 availability. If dependency of the C:N:P ratio on [CO2 (aq)] proves to be a general phenomenon in marine phytoplankton, changes in the elemental composition may be expected in response to the currently observed increase in partial pressure of atmospheric CO2.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 01:54:14