Porewater nutrients (phosphate, ammonia and silicate) in the eastern part of the southern Baltic Sea

• Autorzy: Graca B. , Witek Z. , Burska D. , Białkowska I. , Pawelec A. , Bolałek J.
• Języki publikacji: EN

Abstrakty

EN

In the present work, results of studies concerning phosphate, ammonia and silicate in porewaters of the eastern part of the southern Baltic sediments are presented. A strong interaction was observed between the investigated compound concentrations and the sea bottom type, defined by means of the sediment water content (W) and loss on ignition (LOI) values. High concentrations and an exponential increase in concentration downwards in the sediment depth profile was observed in regions named here transport/accumulation bottom (LOI?4%, W?50%). Lower concentrations and irregular changes in concentration with depth occurred in regions designated as erosion bottom type (LOI<4, W<50%). Only in areas under strong anthropogenic influence (Vistula river mouth, the vicinity of Gdynia harbour), in the erosion type bottom concentration periodically raised to the level observed in the transport/accumulation bottom areas. The mass of nutrients accumulated in porewaters in the 10 cm thick layer of surface sediments of the Gulf of Gdańsk in September 2000 was estimated to be 910 t P-PO43-, 2780 t N-NH4+ and 5430 t DSi, while in March/April of 2001 estimated values equalled 908 t P-PO43-, 1860 t N-NH4+ and 3080 t DSi. In the erosion bottom areas, approximately 12 t, 210 t and 650 t of P-PO43-, N-NH4+ and DSi, respectively, were flushed out of the sediments during the intensive autumn-winter mixing.

Słowa kluczowe

EN

nutrients; pore water; sediment(s); Gdańsk Basin; Southern Baltic

• Wydawca: Institute of Oceanography University of Gdańsk
• Czasopismo: Oceanological and Hydrobiological Studies
• Rocznik: 2006
• Tom: Vol. 35, No.3
• Strony: 237--256
• Opis fizyczny: bibliogr. 48 poz., wykr.

Twórcy

autor

Graca B.

autor

Witek Z.

autor

Burska D.

autor

Białkowska I.

autor

Pawelec A.

autor

Bolałek J.

• Department of Marine Chemistry and Environmental Protection Institute of Oceanography, University of Gdańsk,

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