Nutrient Dynamics in the Pomeranian Bay (Southern Baltic): Impact of the Oder River Outflow

摘要: The Pomeranian Bay is a coastal region fed by the Oder River, one of seven largest Baltic rivers, whose waters flow through large and complex estuarine system before entering bay. Nutrients (NO3−, NO2−, NH4+, Ntot, PO43−, Ptot, DSi), chlorophylla concentrations, oxygen content, salinity, temperature were measured in nine seasonally distributed cruises during 1993–1997. Strong spatial temporal patterns observed they governed by: variable riverine water-nutrient discharges, uptake nutrients their cycling river estuary Bay, character water exchange between Szczecin Lagoon, that are dominated wind-driven circulation. Easterly winds resulted nutrient transport along German coastline, while westerly confined rich to Polish coast transported them eastward beyond study area. Two masses, open, characterized different chemical physical parameters chla content found independently season. role transformation, as well transformation processes stressed paper. DIN:DIP:DSi ratio indicated phosphorus most probably played limiting phytoplankton production spring, nitrogen did same summer. During spring bloom, predominated diatoms, DSi:DIN dropped 0.1 0.6 open bay waters, pointing silicon limitation diatom growth, similar what being other regions.