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Wyszukujesz frazę "chlorophyll a concentration" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Chlorophyll fluorimetry as a method for studying light absorption by photosynthetic pigments in marine algae
    Autorzy:
    Matorin, D.N.
    Antal, T.K.
    Ostrowska, M.
    Rubin, A.B.
    Ficek, D.
    Majchrowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/48459.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    alga
    chlorophyll a concentration
    photosynthetic pigment
    fluorescence
    marine alga
    phytoplankton
    light absorption
    chlorophyll fluorimenty
    Opis:
    Using laboratory cultures of algae and natural phytoplankton populations from Nhatrang Bay (South China Sea), the relationship between the chlorophyll fluorescence F0, the chlorophyll a concentration Ca and light absorption capacities of algae cells was studied. It is shown that the ratio F0/Ca depends mainly on the species composition of the algae population; hence, the concentration Ca can be measured with the fluorescence method with acceptable accuracy only when the species composition of algae populations varies over a rather narrow range. The fluorescence F0 can, however, be a good index of the total absorption capacities of different phytoplankton species, because the intensity of F0 depends on the sum total of light absorbed by all photosynthetic pigments in a plant cell. Thus, the fluorescence F0 measures not only the concentration of chlorophyll a, but that of all photosynthetic pigment concentrations.
    Źródło:
    Oceanologia; 2004, 46, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of turbulence and phytoplankton dynamics on foam formation, seawater viscosity and chlorophyll concentration in the Eastern English Channel
    Autorzy:
    Kesaulya, I.
    Leterme, S.C.
    Mitchell, J.G.
    Seuront, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/48511.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    chlorophyll a concentration
    phytoplankton
    turbulence
    plankton
    foam
    foam formation
    spring bloom
    rheology
    viscosity
    Phaeocystis globosa
    sea water
    Opis:
    The space-time dynamics of chlorophyll a concentration and seawater excess viscosity has been investigated in the hydrographically contrasting inshore and offshore water masses of the eastern English Channel. This was done during the phytoplankton spring bloom dominated by Phaeocystis globosa before and after the very large-scale formation of foam induced by an increase in wind-driven turbulence and the related wave breakings. The results suggest that the dynamics of chlorophyll a concentration and seawater excess viscosity are differentially controlled by the formation of foam through the intensity of the spring bloom and wind-generated turbulence.
    Źródło:
    Oceanologia; 2008, 50, 2; 167-182
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development and dynamics of a coastal sub-surface phytoplankton bloom in the Southwest Kattegat, Baltic Sea
    Autorzy:
    Lund-Hansen, L.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/48742.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    chlorophyll a
    dymanics
    Kattegat
    subsurface phytoplankton
    concentration
    development
    bloom
    Baltic Sea
    phytoplankton
    Opis:
    The study was based on CTD-casts performed on 5 consecutive days at 7 positions along a shallow- to deep-water transect during the spring bloom in the southwest Kattegat. The development, dynamics and fate of the sub-surface chlorophyll maximum (SCM) are described. The SCM developed at a constant rate of 1.4 mg chl a m−3 d−1, which is equal to a carbon fixation rate of 49.0 mgC m−3 d−1. The SCM developed at 6 m depth at low irradiance levels (10–43.0 μE m−2 s−1). Chl a concentrations reached up to 23 mg chl a m−3 in the centre of the SCM. Growth rates in the SCM were estimated at 0.82 d−1. The water column was only weakly stratified, with nutrients in excess in the whole of the water column. The SCM was relocated vertically to depths below the photic zone by wind-induced advection between the bay and the outer Kattegat. There were indications of a horizontal relocation of the SCM by an internal standing wave. Application of high spatial and temporal resolution made it possible to estimate key SCM parameters, such as growth rates [mg chl a m−3 d−1] and carbon fixation rate [mgC m−3 d−1], on the basis of chl a variations in time and space.
    Źródło:
    Oceanologia; 2006, 48, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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