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Titolo:
INCORPORATION RATES AND BIOMASS CONTENT OF C AND P IN PHYTOPLANKTON AND BACTERIA IN THE BAY-OF-AARHUS (DENMARK) JUNE 1992
Autore:
THINGSTAD TF; RIEMANN B; HAVSKUM H; GARDE K;
Indirizzi:
UNIV BERGEN,DEPT MICROBIOL & PLANT PHYSIOL,JAHNEBK 5 N-5020 BERGEN NORWAY INT AGCY 14C DETERMINAT,WATER QUAL INST DK-2970 HORSHOLM DENMARK
Titolo Testata:
Journal of plankton research
fascicolo: 1, volume: 18, anno: 1996,
pagine: 97 - 121
SICI:
0142-7873(1996)18:1<97:IRABCO>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
MARINE BACTERIOPLANKTON; PROTOZOAN BACTERIVORY; PHOSPHORUS; COMPETITION; GROWTH; MODEL; RATIO; REGENERATION; ENVIRONMENTS; ASSEMBLAGES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
T.F. Thingstad et al., "INCORPORATION RATES AND BIOMASS CONTENT OF C AND P IN PHYTOPLANKTON AND BACTERIA IN THE BAY-OF-AARHUS (DENMARK) JUNE 1992", Journal of plankton research, 18(1), 1996, pp. 97-121

Abstract

Biomass content and incorporation rates for carbon (C) and phosphorus(P) in microbial plankton in the Bay of Aarhus were investigated during a 1 week period. Samples taken daily at a fixed station, as well asduring a diel cycle, allowed comparison of the water masses above, inand below the pycnocline, and in influxes of different water masses. The coupling between the activity of phytoplankton and bacteria was examined by the stoichiometric composition in pools and fluxes. From microscope-based estimates of bacterial C and chemical determination of phosphate in the size fraction 1-0.2 mu m, the mean C:P ratio (molar) for bacterial biomass was 78, while the mean C:P ratio for incorporation was 96 or 63 from thymidine- and leucine-based estimates of bacterial C production. Thymidine-based estimates of mean bacterial generationtime varied from 2.5 to 4.1 days with a minimum in the interface between water of Baltic and Skagerrak origin. These values are in good agreement with P-based generation time estimates. C-14 measurements of primary production and orthophosphate incorporation into the size fraction >1 mu m gave a mean C:P ratio of 118, similar to the Redfield ratio(106), but about twice the estimated mean C:P of 52 in protist biomass. The combined methodological concept can be used to examine the simultaneous role of microorganisms in the C and P budgets.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/01/21 alle ore 22:51:33