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Light absorbtion and maximum yield of photosynthesis during autumn phytoplankton bloom in the western Black Sea. IBSS Repository
Churilova, T. Ya.; Finenko, Z. Z.; Turgul, S..
In the frame of GEF/UNDP Black Sea Ecosystem Recovery Project the effect of nutrient availability on phytoplankton light absorption and maximum quantum yield of carbon fixation (фmax) has been investigated. It has been found out that chlorophyll a concentration (Chl a) varied from 0.3 to 10 mg m-3 increasing from deep-water region to shelf waters. At the shallow stations, where upper mixed layer spread deeper the bottom of euphotic zone, the homogenous pigment distribution was observed. In the deep-water region the Chl a profiles showed the presence of a deep Chl a maximum (DCM) below a seasonal density cline. The functional characteristics of phytoplankton showed depth-dependent variation. The phytoplankton from DCM was characterized 20 % lower values of...
Tipo: Journal Contribution Palavras-chave: Chlorophyll a; Phytoplankton; Light absorption; Maximum quantum yield; Nutrients; Хлорофилл a; Фитопланктон; Поглощение света; Максимальный квантовый выход; Биогенные элементы; Хлорофіл а; Фітопланктон; Поглинання світла; Максимальний квантовий вихід; Біогенні елементи.
Ano: 2008 URL: http://repository.ibss.org.ua/dspace/handle/99011/823
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Natural variability of bio-optical properties in Case 1 waters: attenuation and reflectance within the visible and near-UV spectral domains, as observed in South Pacific and Mediterranean waters ArchiMer
Morel, A.; Claustre, H.; Antoine, D.; Gentili, B..
The optical properties of Case 1 waters have been empirically related to the chlorophyll concentration, [Chl], historically used as an index of the trophic state and of the abundance of the biological materials. The well-known natural variability around the mean statistical relationships is here examined by comparing the apparent optical properties (spectral downward irradiance attenuation and reflectance) as a function of [Chl] in two Case 1 environments, the Pacific and Mediterranean waters. These oceanic zones apparently represent two extremes of the possible bio-optical variability range around the mean. The systematic deviations, in both directions with respect to the average laws, mainly result from the differing contents in non-algal detrital...
Tipo: Text Palavras-chave: Light absorption; Algal biomass; Ocean color; Chlorophyll; Sea; Phytoplankton; Model; Coefficients; Algorithms.
Ano: 2007 URL: https://archimer.ifremer.fr/doc/00209/32012/30549.pdf
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