Ecology
It’s noted that qualitative consistence of the periphyton biocenosis fauna in the region of Makchachkala port is very poor and their structure is some simple because of it. The Bacillariophyta algae are predominant in the biocenosis (27 species); single examples of the rest organisms (larva and adult forms of Balanus, Oligochaeta, Chlorophyta and Cyanophyta algae) are meet. Average biomass of the periphyton biocenosis equal to 8,0 g/m2.
It’s established, that periphyton biocenosis in the region of 7 – Karaman is qualitatively much more rich and their structure is rather complex. Larva and adult forms of crabs are predominant here; larva and adult forms of Balanus and Mytilaster are subdominant and different representatives of algae are secondary. Average biomass of this biocenosis equal to 45 mg/m2 and more than five times exceeds a biomass of the environmental benthos.
Institute of Biological Resources of the Dagestan Centre of Science
of the Russian Academy of Sciences