Ecoinformatics Problems of the World Ocean - New Ecoinformatics Tools in Environmental Science: Applications and Decision-making - page 281

A opt,M,r0 , whose trajectory has a minimum disagreement with A(t), then, based on
this, we can find the most reliable goal of the ecosystem

:

A r0 ¼ g ðÞ

1 A opt ; M ; r0 ðÞ

According to the principles mentioned above, the derivation of a numerical
model of the ocean ecosystem A (Fig. 4.3 ) requires either a detailed description of
its states or derivation of an adequate complex of numerical models of energy
exchange between the trophic levels, taking place in A, as well as interactions of the
biotic, abiotic, and hydrophysical factors. Of course, in this case an availability of a
certain set of hypothesis is assumed concerning the character of the balance rela-
tionships in the ecosystem A.
The basic hypothesis is that in the ecosystem A the only original source of
energy and matter for all forms of life is the solar radiation energy (E). According to
numerous theoretical and experimental studies, the sun light penetration into deep
layers of the ocean follows an exponential law

2
4

3
5

Z

z

E ð u; k; z ; t Þ ¼ uE 0 exp f d p ðu; k; x ; t Þþb d ðu; k; x ; t Þþm Z ðu; k; x ; t Þ g dx a z

0

þð 1 u Þ E 0 exp ðf z Þ;

ð 4 : 18 Þ