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International Journal on Algae
SJR: 0.219 SNIP: 0.261 CiteScore™: 0.24

ISSN Print: 1521-9429
ISSN Online: 1940-4328

International Journal on Algae

DOI: 10.1615/InterJAlgae.v21.i4.30
pages 321-334

Diatoms of Bryopsis plumosa (Hudson) C. Agardh (Chlorophyta, Bryopsidales) Epiphyton from the Black and Aegean Seas

L. I. Ryabushko
FRC .O. Kovalevsky Institute of Biology of the Southern Seas of the RAS, 38 Lenin Avenue, Building 3, Moscow 119991, Russia
A. V. Bondarenko
FRC A.O. Kovalevsky Institute of Biology of the Southern Seas of the RAS, 38 Lenin Avenue, Building 3, Moscow 119991, Russia
A. G. Shiroyan
FRC A.O. Kovalevsky Institute of Biology of the Southern Seas of the RAS, 38 Lenin Avenue, Building 3, Moscow 119991, Russia


Species diversity of epiphytic Bacillariophyta inhabiting benthic green alga Bryopsis plumosa in the Black (the bays of the Crimean coast) and Aegean (coasts of Rhodes and Monsell bank) seas was studied. A list of 54 taxa belonging to 3 classes, 12 orders, 25 families, and 35 genera is presented. Thirty-six species were found in the Quarantine, Cossack, and Koktebel bays of the Black Sea, and 28 species - in the samples from the Aegean Sea. Most of the species (more than 90%) are known as benthic forms. Seven common species were identified: Ahrurnthes brevipes, Ardissonea crystallina, Cocconeis scutellum, Grammatophora marina, Licmophora abbreviata, Striatella unipunctata, and Tabularia tabulata. The genus Licmophora (6 species) is most diverse. Five taxa new to the Aegean were noted: Actinocyclus curvatulus, Ardissonea fulgens, Diatomella salina var. septata, Eunotia bilunaris, and Planothidium hauckianum. The flora is dominated by marine (43%) and brackish-water species (37%). Twenty-five species-indicators of water saprobity were identified. Of the phytogeographic elements, a significant proportion are arctic-boreal-tropical and boreal-tropical species (41%), as well as cosmopolitans (33%) are noted; these species have a wide range of distribution and belong to the mass species of microphytobenthos of the seas. A comparison of the species composition of B. plumosa epiphyton from different geographical regions of Crimea showed a significant difference: common species are Hyalodiscus scoticus, A. crystallina, G. marina, and T. tabulata. Quantitative data on Bacillariophyta in the epiphyton of B. plumosa were obtained for the first time. In the Koktebel Bay in May, the number and biomass of epiphytic Bacillariophyta ranged (2.3-14.4)·103 cells·cm-2 and 0.001-0.004 mg·m-2, respectively. In the Quarantine Bay in March, the number of epiphytic diatoms was 394·103 cells·cm-2, biomass -0.254 mg·cm-2.


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