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Titolo:
Marine bacterioplankton show bursts of rapid growth induced by substrate shifts
Autore:
Hagstrom, A; Pinhassi, J; Zweifel, UL;
Indirizzi:
Kalmar Univ, S-39129 Kalmar, Sweden Kalmar Univ Kalmar Sweden S-39129Kalmar Univ, S-39129 Kalmar, Sweden Umea Univ, Dept Microbiol, S-90187 Umea, Sweden Umea Univ Umea Sweden S-90187 Univ, Dept Microbiol, S-90187 Umea, Sweden
Titolo Testata:
AQUATIC MICROBIAL ECOLOGY
fascicolo: 2, volume: 24, anno: 2001,
pagine: 109 - 115
SICI:
0948-3055(20010530)24:2<109:MBSBOR>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
DISSOLVED ORGANIC-CARBON; HETEROTROPHIC BACTERIA; ESCHERICHIA-COLI; SECONDARY PRODUCTION; LARGE FRACTION; CELL; AUTORADIOGRAPHY; LIMITATION; ABUNDANCE; WATERS;
Keywords:
bacterioplankton; growth; substrate;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Hagstrom, A Kalmar Univ, Box 905, S-39129 Kalmar, Sweden Kalmar Univ Box 905 Kalmar Sweden S-39129 9129 Kalmar, Sweden
Citazione:
A. Hagstrom et al., "Marine bacterioplankton show bursts of rapid growth induced by substrate shifts", AQUAT MIC E, 24(2), 2001, pp. 109-115

Abstract

Diel dynamics of marine bacterioplankton was monitored at sampling sites in the Bothnian Sea (NB1) and the Mediterranean Sea (Villefranche Bay). At both locations, considerable diel variation was found in bacterial production, with highest values recorded during midday and lower values during nightand early morning. The abundance of bacteria scored by the number of nucleoid-containing cells (NUCC) also changed during the day, with minimum numbers during midday. The bacterial turnover rate based on thymidine incorporation and NUCC varied between 0.22-0.31 and 0.48-2.40 d(-1) in the Bothnian Sea and Mediterranean, respectively. There was a significant positive correlation between the community turnover rate and phosphate concentration both in the Bothnian Sea and in the Mediterranean. In the Mediterranean, nutrient addition experiments showed that phosphate was the least available 'commodity' for the bacterial community. Combined addition of phosphate and glucose stimulated bacterial growth more than a single addition of either substrate alone, reaching a bacterial turnover of 2.4 d(-1). This value was equalto the maximum turnover rate found in situ during the daily cycle. Our results suggest that bacterioplankton rapidly adjust their growth rate in response to did changes in nutrient supply.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/01/20 alle ore 20:04:20