Морской экологический журнал. - 2008. - Т. 7, № 3.
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Поиск Морской экологический журнал. - 2008. - Т. 7, № 3. по ключевым словам "максимальный квантовый выход"
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Материал Light absorption and maximum quantum yield of photosynthesis during autumn phytoplankton bloom in the western Black Sea(2008) Churilova, T.; Finenko, Z.; Tugrul, 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 (max) 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 spectral averaged Chl-a – specific light absorption (0.016±0.0025 m2 (mgChl)-1) and more than in two times higher values of max (0.070±0.012 molC (mol quanta)-1) compared with the surface phytoplankton (0.021±0.0035 m2 (mgChl)-1) and max (0.030±0.0078 molC (mol quanta)-1). From offshore to shallow stations the increasing of surface Chl a concentration was accompanied with slight decrease of (on ~20 %) and significant increase of max up to its theoretical limit - 0.1 molC (mol quanta)-1, which were caused by an increase in nutrient supply across the shelf.