PRODUCTIVE AND DESTRUCTIVE PROCESSES IN THE IRANIAN COASTAL AREA OF THE CASPIAN SEA BETWEEN ASTARA AND ANZALI

Abstract

We present the results of the microbiological
research, performed for the fi rst time in the Iranian coastal
waters of the Caspian Sea near the regions of Astara and
Anzali. The collection of the samples and observation were
carried out seasonally at 13 stations; the objective was to determine
the ecological situation of the coast line, where dozens
of local rivers join together and fl ow in. It was found that
the local rivers enrich the areas near the river mouths with a
rich substance called allochthonous. Solid particles present
in the river fl ow, mainly in narrow areas, reduce the clarity of
water, which affects negatively the process of photosynthesis
of plankton. We have also shown that special environmental
conditions are typical of lake Anzali, where in summer the
phytoplankton develops to the stage of fl owering, thereby
enriching the waters with phytoncids, autochthonous organic
particles, which in turn have an impact on anaerobiosis-dying
appearance.