Temperature and N:P ratio as factors causing blooms of blue-green algae in the Gulf of Gdańsk

• Autorzy: Pliński M. , Jóźwiak T.
• Języki publikacji: EN

Abstrakty

EN

The bloom dynamics of two planktonic, nitrogen-fixing species of blue-green algae Aphanizomenon flos-aquae (L.) Ralfs and Nodularia spumigena Mertens in the Gulf of Gdansk were studied. The Gulf of Gdansk is a shallow part of the Baltic Sea where the water has a mean salinity of ca 8 PSU. Increased riverine nutrient input and/or changes in the N:P ratio are indicated as factors causing blue-green algae blooms. A low N:P ratio appears to trigger blooms. The mean annual value of N:P in the Gulf of Gdansk since 1981 is 6.5 with a minimum of ca 3. There could be a link between temperature and the year-to-year differences in bloom intensities. A huge bloom of toxic N. spumigena was reported in July 1994 when the water temperature rose to 22oC.

Słowa kluczowe

EN

blue-green algae; blooms; Baltic Sea

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 1999
• Tom: No. 41 (1)
• Strony: 73--80
• Opis fizyczny: Bibliogr. 14 poz., tab., wykr.

Twórcy

autor

Pliński M.

autor

Jóźwiak T.

• Institute of Oceanography, Gdańsk University, Piłsudskiego 46, 81–378 Gdynia, Poland,

Bibliografia

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