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Wyszukujesz frazę "chlorophyll concentration" wg kryterium: Temat


Wyświetlanie 1-5 z 5
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:
Spatial distribution of biological and physical sediment parameters in the Western Gulf of Gdansk
Autorzy:
Huzarska, K.
Powiązania:
https://bibliotekanauki.pl/articles/48994.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
spatial distribution
surface sediment
physical property
biological activity
microphytobenthos
primary production
extracellular polymeric substance
chlorophyll a concentration
carbohydrate concentration
Źródło:
Oceanologia; 2013, 55, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatio-temporal variability of the phytoplankton biomass in the Levantine basin between 2002 and 2015 using MODIS products
Autorzy:
El Hourany, R.
Fadel, A.
Gemayel, E.
Abboud-Abi Saab, M.
Faour, G.
Powiązania:
https://bibliotekanauki.pl/articles/48550.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
spatio-temporal variability
phytoplankton biomass
remote sensing
sea surface temperature
chlorophyll a concentration
phytoplankton bloom
Mediterranean Sea
Opis:
The Levantine basin in the Eastern Mediterranean Sea is subject to spatial and seasonal variations in primary production and physical-chemical properties both on a short and long-term basis. In this study, the monthly means of daily MODIS product images were averaged between 2002 and 2015, and used to characterize the phytoplankton blooms in different bioregions of the Levantine basin. The selected products were the sea surface temperature (SST), the chlorophyll-a concentration (Chl-a), the diffuse attenuation coefficient for downwelling irradiance at 490 nm (Kd_490) and the colored dissolved organic matter index (CDOM_ index). Our results showed that phytoplankton blooms were spatially and temporally variable. They occurred in late autumn at the Nile Delta, in early spring and late summer at the eastern coastline, and in spring at the northeastern coastline. The northern coastline and the open water had a common bloom occurring in winter. The Nile Delta was found to be the most productive area of the Levantine basin showing high Chl-a. Kd_490 and Chl-a present a parallel co-variation indicating a dominance of Case 1 waters in the Levantine basin. The CDOM_index shows a phase shift with the Chl-a fluctuation. A strong inverse correlation was observed between both Chl-a and CDOM_index with SST, connoting an indirect relation represented by a depression of CDOM in summer by photobleaching, and a suppression of the chlorophyll-a concentration due to water stratification, together with nutrient stress. An overestimation of the Chl-a values had been signaled by the use of the CDOM_index, suggesting a correction plan in a latter study.
Źródło:
Oceanologia; 2017, 59, 2
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:
Summer mesozooplankton community of Moller Bay (Novaya Zemlya Archipelago, Barents Sea)
Autorzy:
Dvoretsky, V.G.
Dvoretsky, A.G.
Powiązania:
https://bibliotekanauki.pl/articles/49179.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
mesozooplankton
biomass
vertical distribution
water temperature
salinity
chlorophyll a concentration
Barents Sea
Moller Bay
Novaya Zemlya Archipelago
Źródło:
Oceanologia; 2013, 55, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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