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

ISSN Imprimir: 1521-9429
ISSN On-line: 1940-4328

International Journal on Algae

DOI: 10.1615/InterJAlgae.v11.i3.20
pages 211-221

Role of phosphorus in regulation of Emiliania huxleyi (Lohm.) Hay et Mohl. (Haptophyta) blooms in the northeastern Black Sea

V. A. Silkin
Southern Branch of the P.P. Shirshov Inst. of Oceanology, RAS, 353467 Gelendzhik, Krasnodar Region, Russia ; Institute of Cosmic Research, RAS, 84/32, Profsoyuznaya St., 17997Moscow, Russia
L. A. Pautova
P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences,36, Nakhimovskiy St., 117997 Moscow, Russia
A. S. Mikaelyan
P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences,36, Nakhimovskiy St., 117997 Moscow, Russia

RESUMO

A role of phosphorus in regulation of mass development of Emiliania huxleyi (Lohm.) Hay et Mohl. in the northeastern part of the Black Sea was investigated in laboratory experiments with use of bath culture and mathematic methods. It was shown that low nitrogen/phosphorus ratio does not necessarily point to nitrogen as limiting factor for coccolithophorids growth. The reaction of the phytoplankton community to the nitrogen and phosphorus supply depends on species composition of dominating complex. The supplement of nutrients to the base culture with phytoplankton community where dominating complex included diatoms resulted in their absolute dominance due to higher specific growth rate (maximum growth rate of diatoms was 1.53 day−1, coccolithophorids -0.53 day−1). Deficiency of nitrogen and phosphorus caused acceleration of the coccolithophorids cells degradation rate from 0.08 to 0.20 day−1.