Distribution of recent calcareous nannofossils in bottom sediments from Gokceada-Bozcaada-Dardanelles triangle

Twenty-nine species of 12 calcareous nannoplankton genera have been recogni zed in an investigation of 100 surface samples from Gokceada-Bozcaada-Darda nelles triangle in the northeastern Aegean Sea. Emiliana huxleyi (Lohmann) is the dominant species; the diversity of nannofossils increases proportion ally with water depth, salinity, and temperature from the Dardanelles to th e Aegean Sea. In the studied area, subtropical-warm species exceed those of the subtropical-cool regime. Coccolithus pelagicus (Wallich) and Gephyroca psa caribbeanica Boudreaux and Hay, which represent the subtropical-cool wa ters, display an increase in abundances at the exit of Dardanelles. In cont rast, Gephyrocapsa oceanica Kamptner and Syracosphaera pulchra Lohmann, whi ch represent the subtropical-warm waters, display an increase in abundance away from the exit of Dardanelles to the Aegean Sea.