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Titolo:
IN-SITU BACTERIAL PRODUCTION AND GROWTH-YIELD MEASURED BY THYMIDINE, LEUCINE AND FRACTIONATED DARK OXYGEN-UPTAKE
Autore:
DANERI G; RIEMANN B; WILLIAMS PJL;
Indirizzi:
UNIV MAR,CTR CIENCIAS & ECOL APLICADA,DEPT OCEANOG & BIOL PESQUERA,CHILEAN BIOGEOCHEM GRP VINA DEL MAR CHILE UNIV COLL N WALES,SCH OCEAN SCI MENAI BRIDGE LL59 5EY GWYNEDD WALES INT AGCY C DETERMINAT,WATER QUAL INST DK-2970 HORSHOLM DENMARK
Titolo Testata:
Journal of plankton research
fascicolo: 2, volume: 16, anno: 1994,
pagine: 105 - 113
SICI:
0142-7873(1994)16:2<105:IBPAGM>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANKTON COMMUNITY RESPIRATION; BACTERIOPLANKTON; FRESH; ECOSYSTEMS; BIOMASS; RATES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
G. Daneri et al., "IN-SITU BACTERIAL PRODUCTION AND GROWTH-YIELD MEASURED BY THYMIDINE, LEUCINE AND FRACTIONATED DARK OXYGEN-UPTAKE", Journal of plankton research, 16(2), 1994, pp. 105-113

Abstract

In situ bacterial net production and growth yield were measured usingthymidine, leucine incorporation and dark oxygen consumption techniques in marine enclosures and in the Bay of Aarhus. Denmark. Bacterial respiration was significantly correlated with thymidine (r2 = 0.42, P <0.01, y = 0.12x + 0.054) and leucine (r2 = 0.45, P < 0.01, y = 0.09x 0.043). The range of bacterial growth yield, calculated from the relationship net production/net production + respiration, was 0.07-0.77 with 74% of the observations lying in the 0.15-0.45 growth yield interval. Substrate was an important determinant of growth yields. A significant difference was found between growth yields obtained from an enclosure with added glycine (mean 0.32 +/- 0.096) and one with added inorganic nutrients (mean 0.16 +/- 0.051) (P < 0.01, t-test). Growth yield showed a weak but significant negative correlation with temperature (r2 = 0.0.35, P < 0.001, y = -0.017x + 0.52). No correlation between chlorophyll a and growth yield was found (r2 = 0.25, P > 0.05). The results suggest that thymidine and leucine techniques reflect the levels ofbacterial production to better than an order of magnitude. The variations found in the growth yield support the notion that relying on fixed growth yields reduces the accuracy of estimating gross bacterial production.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/01/21 alle ore 22:16:34