| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Monthly HPLC measurements of pigment concentration from an intertidal muddy sediment of Marennes-Oléron Bay, France
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| Autores: |
Cariou-le Gall, Valerie
Blanchard, Gerard
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| Data: |
1995-05
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| Ano: |
1995
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| Palavras-chave: |
Pigment
HPLC
Intertidal mudflat
Microphytobenthos
Seasonal change
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| Resumo: |
Chloropigments and carotenoids were measured by HPLC in an intertidal muddy sediment of Marennes-Oleron Bay (France). Concentrations were determined as a function of sediment depth at low tide. The analyses were carried out at monthly intervals over 1 yr. Pigment analysis indicated that the microphytobenthic community was dominated by diatoms throughout the sampling year. Chlorophyll b was not encountered at any time or depth, indicating that no input from macrophytic detritus had occurred at the sampling site. There was a large pool of phaeopigments a, of which phaeophorbides were the major forms (75%). A microphytobenthic bloom occurred between March and June during which phaeopigments significantly increased with a high proportion of phaeophorbides likely due to intense grazing activity of benthic invertebrates. Pigment concentrations were still high at 5 cm depth and changes occurred simultaneously in the aphotic (<5 mm sediment depth) and photic (>5 mm sediment depth) layers of the sediment, reflecting an impact of bioturbation and physical mixing (resuspension/redeposition) of the upper sediment layer. There was a decrease of the pigment content of the sediment between June and July. It was attributed to grazing and to a resuspension event. Overall, the pigment analysis of this intertidal sediment indicates a predominance of the diatom community, a close coupling between the dynamics of microphytobenthos biomass and the grazing activity of benthic invertebrates, and the influence of sediment mixing.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00257/36844/36666.pdf
http://archimer.ifremer.fr/doc/00257/36844/
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| Editor: |
Inter-research
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| Formato: |
application/pdf
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| Fonte: |
Marine Ecology Progress Series (0171-8630) (Inter-research), 1995-05 , Vol. 121 , N. 1-3 , P. 171-179
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| Direitos: |
Inter-Research 1995
info:eu-repo/semantics/openAccess
restricted use
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