Data/hora: 03/06/2024 10:03:50

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Evolution du phytoplancton dans des bassins de culture
Autores: | Nival, Paul; Malara, G.; Lelong, P.; Cellario, C.; Charra, R.; Riva, A.
Data: | 1979
Ano: | 1979
Palavras-chave: | Phytoplancton; Culture; Croissance; Composition chimique; Espèces; Phytoplankton; Culture; Growth; Chemical composition; Species.
Resumo: | The concentration of chlorophyll a in large out-door continuous cul­ture was analysed in spring 1977 and 1978, and autumn - winter 1977-1978. The growth of marine phytoplankton in springsl977 is analysed with more details and shows three phases : - first, the diatoms (especially Skeletonema costatum) grow rapidely (27/4 to 3/5). The growth rate estimated by the chlorophyll measurements is 1.36 day“1. - then (3/5 to.13/5) the concentration of chlorophyll remains more or less constant (23.611.2 mg/m3) as well as the concentration of particulate organic matter. - at the end of the experiment (13/5 to 20/5) the concentration of chlo­rophyll falls as soon as Skeletonema costatum decrease in number.The declin of the phytoplankton biomass is followed by an increase of the bacteria which reach a maximum on 15/5. We assume that the rapid decrease of chlorophyll a on the 13/5 is related to the effect of the dissolved silicate deficiency on skeletonema costatum and to the grazing by rotifers and copepods.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00305/41668/40877.pdf

http://archimer.ifremer.fr/doc/00305/41668/

Editor: | Publications du Centre National pour l'Exploitation des Océans (CNEXO). Série : Actes de colloques, n° 7, 1979, pp. 305-322
Formato: | application/pdf

Fonte:

Centre National pour l’Exploitation des Océan, 1979

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