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Fig. 4.22 Dynamics of vertical structure of the upwelling ecosystem elements
All of the other living elements have more or less sharply de
ned and enough
narrow maximum by the depth. However, reserve of nutrient salts is almost fully
used up in upper layer during 10 days, but nevertheless maximum of phytoplankton
biomass is kept at
the depth of 10
-
20 m. Two-maxima structure is formed
beginning from 20
30 days of the system evolution when nutrient salts enter across
thermocline to upper water layers. In this case, the thermocline depth is 55
-
75 m.
-
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