| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Phytoplankton dynamics in the southern New Caledonian lagoon during a southeast trade winds event
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| Autores: |
Neveux, Jacques
Lefebvre, Jean-pierre
Le Gendre, Romain
Dupouy, Cecile
Gallois, Francis
Courties, Claude
Gerard, Philippe
Fernandez, Jean-michel
Ouillon, Sylvain
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| Data: |
2010-09
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| Ano: |
2010
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| Palavras-chave: |
Chlorophyll
Phycoerythrin
Flow cytometry
Phytoplankton
In vivo fluorescence
Growth rate
Trade winds
Lagoon
Internal wave
New Caledonia
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| Resumo: |
During the Echolag cruise (13 February-8 March 2007), the effect of 16-30 knot trade winds on abundance, community structure and dynamics of phytoplankton was investigated in the southern part of the New Caledonian coral reefs and surrounding oceanic waters. In this area, the coral reefs form two horn-like structures (hereinafter referred to as 'horn reefs'), oriented south-east, and separated by a relatively deep valley. Three repeated samplings at one week intervals of a 32 station array showed that trade winds induce surface water cooling and significant enrichment of mid- and bottom waters above the reef shelf. This enrichment appeared as the result of a general rise of the oceanic thermocline and nitracline due to the combination of trade winds and tidally-generated internal waves between the horn reefs. It was accompanied by a factor of 1.5 and 2.3 mean increase for the chlorophyll concentration and picoplankton-nanoplankton cell number, respectively. From diel variations of in vivo chlorophyll a fluorescence and hourly sampling, phytoplankton gross growth rate was estimated to be 1-1.35 divisions per day and was quasi balanced with phytoplankton mortality for a 24 h period.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00013/12437/9258.pdf
DOI:10.1016/j.jmarsys.2010.05.010
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| Editor: |
Elsevier Science Bv
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| Relação: |
http://archimer.ifremer.fr/doc/00013/12437/
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| Formato: |
application/pdf
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| Fonte: |
Journal Of Marine Systems (0924-7963) (Elsevier Science Bv), 2010-09 , Vol. 82 , N. 4 , P. 230-244
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| Direitos: |
2010 Elsevier B.V. All rights reserved.
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