Seasonal Quantitative Dynamics of Periphyton Bacillariophyta on Experimental Glass Slides Exposed Monthly in a Coastal Seawater Area of the Crimea

摘要

Seasonal dynamics of species composition, species richness (S), abundance (N), biomass (B) of periphyton diatoms were studied using Shannon (H), Pielou (e) and Barger-Parker (D-BP) indices. The experimental design included a monthly exposition of glass slides made from samples of Bacillariophyta in the Karantinnaya Bay of Sevastopol from December 2010 to January 2012; temperature in the seawater ranged from 7.5 to 22.5 degrees C. In total, 55 taxa (3 classes, 14 orders, 24 families, 49 genera) of Bacillariophyta were found; 11 species were dominant, 5 of them prevailed in abundance and 9 in biomass. The averages derived for the periphyton diatom community varied as follows: S - from 7 to 25, N - from 57.10(3) to 1229.10(3) cell.cm(-2), B - from 0.007 to 0.353 mg.cm(-2), H - from 1.4 to 3.3, and e - from 0.36 to 0.73, D-BP - from 17 to 71