Details

Autor(en) / Beteiligte

• Finenko, Z Z
• Churilova, TYa
• Lee, R I

Titel

Dynamics of the Vertical Distributions of Chlorophyll and Phytoplankton Biomass in the Black Sea

Ist Teil von

• Oceanology (Washington. 1965), 2005-01, Vol.45, p.S112-S126

Erscheinungsjahr

2005

Beschreibungen/Notizen

• Temporal and regional variations of the vertical distribution of chlorophyll concentrations and fluorescence were established using a large amount of data obtained by many scientists. During the cold period (December to March), when the vertical mixing in the upper layer of the deep-water regions of the sea is very intense, a uniform vertical distribution of chlorophyll concentrations is typical of the 30- to 50-m layer. During the warm period (May to October), when the temperature stratification in the upper layer was formed, vertical profiles with a single chlorophyll maximum prevailed. The depths of the chlorophyll maximum varied significantly and depended on its concentration. The photoadaptation of phytoplankton and the rate of nutrient flux from the deeper layers to the surface appeared to be the main factors controlling the shape of the vertical profile of chlorophyll and its relative content in phytoplankton. In the summertime, the chlorophyll profile differs from that of the phytoplankton biomass in peak amplitudes and depths. These differences are caused by the changes in the intracellular chlorophyll concentration of the algae dwelling under different light conditions. The relationships are described that allow one to retrieve the vertical profile of chlorophyll and the phytoplankton biomass on the basis of the surface chlorophyll concentration, which gives new opportunities for effective use of remote sensing data for solving ecological problems related to the productivity and eutrophication of the Black Sea.