BIOLOGIYA MORYA, 2016, Vol. 42, No. 5, pp. 334-342 |
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The composition and structure of the benthic diatom taxocene (Bacillariophyta) near Cape Fiolent (the Crimea, the Black Sea) A.O. Kovalevsky Institute of Marine Biological Research (IMBR), Russian Academy of Sciences, Sevastopol 299011 E-mail: For the first time in waters of the Cape Fiolent reserve, a high species richness of benthic diatoms was revealed on natural substrates - 290 species and infraspecific taxa (IT), belonging to 281 species, 68 genera, 32 families, 19 orders, and 3 classes. There were 68 species and 3 genera previously recorded as new for the flora of the Black Sea, 3 species and one taxonomic combination previously described as new to science, and 4 species that did not occur in the Black Sea in the past 50 and 100 years of research. Navicula (41 species and IT), Amphora (30), Nitzschia (29), Fallacia (20), Cocconeis (17), and Diploneis (16) were the most widely represented genera. Only one representative was identified in each of the orders Anaulales, Ardissoneales, Thalassionematales, Rhaphoneidales, and Rhopalodiales. The diversity assessment carried out using the taxonomic distinctness index (TaxDI) revealed that the structure of the phylogenetic tree of the diatom taxocene was formed of branches of various species saturation and different hierarchical subordination, but with the predominance of polyspecific taxa within the generic level. The values of TaxDI (Δ+ = 76.71; Λ+ = 361.52) point to low uniformity and high variability of the structure of the benthic diatom taxocene in at Cape Fiolent. Key words: Cape Fiolent, Bacillariophyta, diatoms, benthos, index of taxonomic distinctness TaxDI, taxocene, Crimea. Erratum. The fiollowing misprint has been found in this paper: Table 1, title, "OC, mg/g" should read "OC, μg/g". |
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