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3 Oceanologia

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Photosynthetic rate and light curves of phytoplankton in the southern Baltic

100%

Renk H. , Ochocki S.

Oceanologia

1998

tom No. 40 (4)

331-344

The paper presents photosynthetic curves for the phytoplankton population at three stations located in the Polish Economic Zone of the Baltic Sea, i.e. in the Gdansk and Bornholm Deeps and in the southern part of the Gotland Deep. Studies were carried out in 1995-1998. Assimilation numbers varied from 1.59 to 6.81 mgC mgChl-1 h-1, the average value being 3.31 mgC mgChl-1 h-1. Irradiation of photosynthesis saturation ranged from 216 to 673 kJ m-2 h-1. The seasonal variations in assimilation number and its dependence on water temperature are described.

Photosynthetic light curves in the Pomeranian Bay

100%

Renk H. , Ochocki S. , Chmielowski H. , Gromisz S. , Nakonieczny J. , Pastuszak M. , Zalewski M.

Oceanologia

1999

tom No. 41 (3)

355-371

Photosynthetic light curves at selected stations in the Pomeranian Bay were determined during four cruises undertaken in March and July 1996, and in May and October 1997. The mean assimilation numbers measured in particular seasons were as follows: spring - 2.46 mgC mgChl-1 h-1, summer - 3.99 mgC mgChl-1 h-1, autumn - 3.24 mgC mgChl-1 h-1 and winter - 2.17 mgC mgChl-1 h-1. A significant correlation was found between the assimilation number and water temperature over the entire period of study. In some seasons a dependence between the assimilation number and nutrient concentrations was also noted. Assimilation numbers in the areas adjacent to the Odra river months were higher than in the offshore zone.

Photosynthetic light curves in the Pomeranian Bay

75%

Renk H. , Ochocki S. , Chmielowski H. , Gromisz S. , Nakonieczny J. , Pastuszak M. , Zalewski M.

Oceanologia

1999

tom 41

nr 3