Aktan, Yelda and Lugliè, Antonella Gesuina Laura and Aykulu, Gϋler and Sechi, Nicola (2003) Species composition, density and biomass of coccolithophorids in the Istanbul Strait, Turkey. Pakistan Journal of Botany, Vol. 35 (1), p. 45-52. eISSN 2070-3368. Article.
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A first report of the coccolithophorid flora in the phytoplankton of the Istanbul Strait is presented in this paper. Samples were taken with a Nansen bottle at three depths (surface, -5 m, -10 m), on the coast of Istanbul Strait, considering four different areas: Üsküdar, Çengelköy, Kanlica and Beykoz during May 97 and August 1998. Density, biomass and total phytoplankton chlorophyll a content were calculated. During the study period, some physical and chemical parameters were measured. A total of five species of coccolithophorids were observed at sites, however considerable differences were observed in the seasonal fluctuations of density and biomass. A bloom was observed during May 1997. Calyptrosphaera species was the most dominated species followed by Anacanthoica acanthos (Shiller) Deflandre. Biomass, quantified as biovolume, showed a well-defined seasonal pattern transferred to the field with 100% survival rate.
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