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1

Long-term changes in the phytoplankton of a shallow storage reservoir

100%
Kozak A., Goldyn R., Tymek K.
Oceanological and Hydrobiological Studies
|
2007
|
tom 36
|
nr Suppl.1
2
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Phytoplankton composition in the Maltanski Reservoir and the lowest part of the Cybina River

86%
Kozak A., Graf M.
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana
|
2013
|
tom 17
Phytoplankton composition was analysed in the Maltański Reservoir and the inlet and outlet of the Cybina River. Samples were collected from three sampling stations in November 2007, February, May and August 2008. Considerable changes in the qualitative and quantitative composition of the phytoplankton in the infl owing and outfl owing water and in the central part of the reservoir were noted. Among 142 taxa chlorophytes were the most numerous group. There were also groups represented by the large values of phytoplankton abundance and biomass such as Cyanobacteria in autumn, chrysophytes in winter, diatoms and cryptophytes in spring and chlorophytes in summer. The diff erences in the qualitative and quantitative composition of the phytoplankton among the analysed sampling stations were noticed. The species composition of the potamoplankton was changing as it passed through the reservoir along the course of the river. With regard to all seasons the lowest number of taxa were noticed in samples from the inlet. The most diversifi ed was phytoplankton composition in the reservoir. The highest similarity between the analysed stations was observed in the phytoplankton composition in the reservoir and outlet of the river from this reservoir.
3

Seasonal changes occurring over four years in a reservoir's phytoplankton composition

72%
Kozak A.
Polish Journal of Environmental Studies
|
2005
|
tom 14
|
nr 4
In the period 1993-1996, the Maltański Reservoir was found to host 233 phytoplankton taxa, belonging to 9 taxonomic classes. The most numerous were cyanobacteria. After regression of the Cyanobacteria-induced water blooming in the spring, chrysophytes, cryptophytes, green algae or diatoms were dominant. The remaining taxonomic groups were clearly less numerous. Changes in the number of a cells and of individual organisms and changes in the phytoplankton biomass were monitored in seasonal cycles. The shares of individual size fractions, i. e., of microplankton (>60 μm) and nanoplankton (2-60 μm) in the total numerical force and biomass of phytoplankton were estimated. Considering the size structure of phytoplankton organisms, nanoplankton comprised 50-100%, particularly in the period between November, 1994 and April, 1995, as well as in the early summer (May, June). Microplankton prevailed in total numbers of organisms between April and October, in particular. High correlation were noted between the number of organisms, number of cells and biomass of phytoplankton on one hand and the physico-chemical parameters of water such as transparency, temperature, pH, BOD₅ index, conductivity and total phosphorus on the other. This pointed to the role played by these parameters in the development of algae. On the other hand, dissolved phosphates, nitrite and ammonium nitrogen exerted no limiting effects on the development of phytoplankton.
4

Changes in the structure of phytoplankton in the lowest part of the Cybina River and the Maltanski Reservoir

58%
Kozak A.
Oceanological and Hydrobiological Studies
|
2010
|
tom 39
|
nr 1
85-94
5

The sustainable restoration of lakes-towards the challenges of the Water Framework Directive

58%
Goldyn R., Podsiadlowski S., Dondajewska R., Kozak A.
International Journal of Ecohydrology and Hydrobiology
|
2014
|
tom 14
|
nr 1
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