PHYTOPLANKTON DIVERSITY IN THE OLIGOTROPHIC WATERS WEST OF ALEXANDRIA (EGYPr)

PHYTOPLANKTON DIVERSITY IN THE OLIGOTROPHIC WATERS WEST OF
ALEXANDRIA (EGYPr)
~·ft. ~\,., ~’iC.~ ‘MI.\.\”. ~A.GOY L. GERGIS AND F. N. ASSAD.
National Institute of Oceanography & Fisheries, Alexandria, ~Faculty of science, Alexandria University, Alexandria,
Egypt.
ABSTRACT
The annual diversity cycle west of Alexandria (Egypt) is
described using the Shamon-Weaver diversity index. A
si””le 118thematical regression equation describing the
dependence of diversity on species frequency variations for
this area is given. The correlations between diversity and
some physico-chemical parameters are also ~iven. Diversity
index end species composition confinM the presence of a
longshore westward surface current in the ares.