engleski

Seasonal phytoplankton distribution in the offshore southern Adriatic waters

Seasonal variations of phytoplankton, thermohaline conditions and nutrients in the oligotrophic, offshore southern Adriatic have not been published to date. Data were collected at five stations along the Bari-Dubrovnik transect (across the southern Adriatic Pit), in the 0-50 m layer, during irregularly performed case studies - from January to September, in the period from 1980 to 1990. Mixing and inflowing currents from the Ionian Sea predominate in the period from January to April, resulting in higher salinity and renewal of nutrients in the euphotic layer. The offshore southern Adriatic is characterised by microphytoplankton blooms, appearing usually in April. In May, average temperature reach 18 oC, phytoplankton bloom exhaust nitrates to average concentration lower than 0.5 micromoles per litre and disappear. In May, phytoplankton blooms could be recorded in the eastern or western neritic waters. Following May, phytoplankton density remains low until next spring.

Nutrientss; temperature; salinity; open sea; Adriatic Sea

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