| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
A comparative-study of nitrogen and carbon uptake by phytoplankton in a coastal eutrophic ecosystem (bay of Brest, france)
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| Autores: |
Dauchez, S
Queguiner, B
Treguer, P
Zeyons, C
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| Data: |
1991
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| Ano: |
1991
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| Palavras-chave: |
CARBON UPTAKE
EUTROPHIC ECOSYSTEM
NITROGEN UPTAKE
PARTICULATE MATTER
PHYTOPLANKTON
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| Resumo: |
Nitrogen (N-15) and carbon (C-14) uptake rates and hydrological, chemical and biological parameters were monitored at a single station during spring (March-April 1989) in a coastal eutrophic ecosystem of western Europe : the Bay of Brest. Before the spring growth of phytoplankton populations, total nitrogen and carbon uptake rates were low (almost-equal-to 0.3-mu-mol C.1(-1).h-1 and almost-equal-to 0.025-mu-mol N.l(-1).h-1). During the spring bloom, these uptake rates reached high values (0.5-mu-mol C.1(-1).h-1 and 0.28-mu-mol N.1(-1).h-1); at this time, nitrate was the main source of nitrogen production, although relative preference index (RPI) values showed that ammonium was the preferred nitrogen form for phytoplankton (RPI (NO3) < 1 ; RPI (NH4) > 5). C/N assimilation ratios were higher than C/N composition ratios of the particulate matter. This difference is interpreted in terms of terrestrial detritus inputs from rivers and variation of the physiological state of phytoplankton populations.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00102/21282/18891.pdf
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| Editor: |
Gauthier-Villars
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| Relação: |
http://archimer.ifremer.fr/doc/00102/21282/
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| Formato: |
application/pdf
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| Fonte: |
Oceanologica Acta (0399-1784) (Gauthier-Villars), 1991 , Vol. 14 , N. 1 , P. 87-95
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