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THE INFLUENCE OF THE EUTROPHICATION ON ZOOPLANKTON
COMMUNITIES IN THE BLACK SEA WATERS


Florica Porumb

Romanian Marine Research Institute Constanta

Abstract
The cycle of quantitative evolution of the pelagic copepods com-
munities in the Black Sea Romanian waters, strongly eutrophicated, 
is investigated during two distinct periods: between 1970 and 1979
and 1980-1986. During the second period, as a result of 
eutrophication, an important numerical increase of copepods has been
recorded, comparing to the first period. Opportunist species such as
Oithona nana and Acartia clausi, to which Oithona similis could be
added, presented a net tendency of quantitative prevelance in the
Copepods population structure belonging to the second period, 
1980-1986.