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Registro Completo |
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: |
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Marc: |
LEADER 01766naa a2200241 a 4500 001 1791604 005 2017-04-05 008 1990 bl --- 0-- u #d 100 1 $aNAGATA, T. 245 $aCarbon- and nitrogen-to-volume ratios of bacterioplankton grown under different nutritional conditions. 260 $c1990 520 $aCarbon- 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. 650 $aaquatic environment 650 $abacterioplankton 650 $acarbon 650 $anitrogen 650 $aBactéria 650 $aCarbono 650 $aMeio Ambiente Aquático 650 $aNitrogênio 653 $aFreshwater bacteria 700 1 $aWATANABE, Y. 773 $tApplied and Environmental Microbiology$gv.56, n.5, p.1303-1309, May, 1990.
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Embrapa Pantanal (CPAP) |
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Biblioteca(s): Embrapa Hortaliças. |
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