Data/hora: 11/05/2024 04:20:39

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 11/09/1997
Data da última atualização: | 05/04/2017
Autoria: | NAGATA, T.; WATANABE, Y.
Título: | Carbon- and nitrogen-to-volume ratios of bacterioplankton grown under different nutritional conditions.
Ano de publicação: | 1990
Fonte/Imprenta: | Applied and Environmental Microbiology, v.56, n.5, p.1303-1309, May, 1990.
Idioma: | Inglês
Conteúdo: | Carbon- and nitrogen-to-volume (C/V and N/V) ratios were determined for freswater bacterial assemblages grown in lake water filtrate or in water enriched with nutrients (aqueous extract of lake seston, glucose, arginine, phosphate, or ammonium). Biovolume was measured by epifluorescence microphotography, and carbon and nitrogen biomasse were measured with a CHN analyzer. Despite large variations of nutritional conditions (i.e., the composition and concentration of the dissolved organic carbon) and different mean cell sizes of the bacterial assemblage (0.17 to 1.8 um3 per cell), the C/V, N/V, and carbon-to-nitrogen weight ratios varied little (C/V ratio, 0.14 pg of C per um3 [standard deviation, 0.057; n=15]; N/V ratio, 0.027 pg of N per um3 [standard deviation; 0.011, n=15]; carbon-to-nitrogen weight ratio, 5.6 [standard deviation, 2.2, n=15]). An average C/V ratio of 0.12 pg of C per um3 that was derived from natural and cultured bacterial assemblages is proposed as an appropriate conversion factor for estimation of the biomass of freshwater bacteria.
Palavras-Chave: | Freshwater bacteria.
Thesagro: | Bactéria; Carbono; Meio Ambiente Aquático; Nitrogênio.
Thesaurus Nal: | aquatic environment; bacterioplankton; carbon; nitrogen.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (34819-1) - ADD - SP - PP - SP15360 -  - 15360 - DIS