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1

Blooms of Cyanophyta in Siemianowka dam reservoir in the first years after filling

100%
Grabowska M.
Oceanological Studies
|
1998
|
vol. 27
|
issue 1
27-31
EN
The biomass and species composition of blue-green algae in a new lowland dam reservoir was analysed from 4th till 6th year after filling. In summer, the massive abundance biomass of blue-green algae (0.93 mg dm^3 on average, max. 6.92 mg dm^3), chiefly of the genera Aphanizomenon, Microcystis and Anabaena causes the high trophy level in the reservoir, de-creasing water quality and aesthetic values of the studied water body. The conditions, which favour the development of blue-green algae, are mainly the result of the natural traits of water in the peat-forest catchment basin.
2

The vegetative period in two chosen dam reservoirs of Southern Poland (Wisla-Czarne reservoir and Dobczyce reservoir)

100%
Wilk_Wozniak E., Bucka H.
Oceanological Studies
|
1998
|
vol. 27
|
issue 2
77-81
EN
The influence of temperature and pH of water on the development of chosen species of algae and cyanophytes (Cyanobacteria, Cyanoprocaryotes) causing water blooms in two dam reservoirs, was studied. Their mass development was observed in various seasons of the year. Each species preferred different environmental conditions. The dominating species of phyto-plankton varied in both reservoirs, only dinoflagellate Ceratium hirundinella being the exception.
3

Formation of phytoplankton in the first years of existence of the water supplying reservoir (southern Poland) against the background of increased eutrophication process

88%
Pajak G.
Oceanological and Hydrobiological Studies
|
2003
|
issue 4
5-77
EN
The aim of the investigations was a recognition of the complex of physico-chemical parameters affecting the dynamics and structure of phytoplankton. The taxonomical composition, abundance and biomass of nano- and phytoplankton has been determined. In the development of the reservoir four stages were distinguished. In stage I of the reservoir filling, the temperature and pH value of water as well as the level of PO4-P, had a decisive influence on the process of phytoplankton formation. A sudden change in the damming ordinate in stage II of the reservoir studies contributed to the development of nanoplanktonic diatoms, and the refilling of the reservoir ( stage III) caused an abundant development of green algae. After the reservoir had been filled (stage IV) the planktonic forms of cryptophytes group dominated. The initial dominance of taxons had no influence on its structure after a four-year searching. A very similar pattern of proportionally altering phytoplankton communities in the investigated basins (BM and BD) suggests that both the depth and availability of nutrient compounds were not the limiting factors in the initial period of functioning of the Dobczyce Reservoir.
4

Eucaryotic algae and cyanobacteria in the river dunajec upstream and downstream from the new dam reservoirs in Czorsztyn and Sromowce and their use for monitoring

88%
Mrozinska-Broda T., Czerwik-Marcinkowska J.
Oceanological and Hydrobiological Studies
|
2004
|
issue 3
83-97
EN
This report presents results of the studies conducted in 2002 of eukaryotic algae and cyanobacteria found in the River Dunajec in the area of the newly built dam reservoirs in Czorsztyn and Sromowce. The studies demonstrated that diatoms were the dominant group in both the river (at 74 %) and the dam reservoirs (at 32 %), and that among the diatoms collected, eutraphenthic [van Dam et al. 1994] species usually prevailed. The diatom group, characterized by a broad ecological scale (tolerant), predominated slightly only at Station 3 located downstream from the dam reservoirs. This variation, which was probably connected with improved water quality in this part of the river, was the result of the sedimentation of pollutants in the dam reservoirs. Equally unexpected was the mass development of Didymosphenia geminata in this area. It occupied not only spots in the riverbed of the River Dunajec, but it also spread to the riversides and even to the river arms close to the confluence of the streams flowing from the Pieniny Mountains. The quantitatively dominant species in this area was Cladophora glomerata, which is an excellent habitat for other algae, particularly diatoms. The ultrastructure of its cell and cell wall is of great significance since it reflects the environmental conditions in which it lives. The ultrastructure of the Cladophora glomerata that occurred at different stations did not differ significantly, nor did it indicate the existence of any considerable hazard resulting from environmental pollution.
5

Microbiological processes taking place in Dobczyce reservoir during spring water bloom

75%
Bednarz T., Starzecka T.
Oceanological Studies
|
1998
|
vol. 27
|
issue 2
13-21
EN
In waters of Dobczyce reservoir, the organic carbon content, biomass of algae and bacteria, respiration of bacteria and respiration of aquatic organisms (measured by oxygen uptake), and energetic expenditures per unit of bacterial biomass ('costs of maintenance') at the beginning of spring water bloom (May, 1996) caused by Nitzschia palea (Kutz.) W. Sm. were greater than those in the second phase of bloom. However, photosynthesis of algae was greater in the second one. In the surface layer of bottom sediments, the greatest values of measured parameters were noted in the second phase of water bloom but the 'costs of maintenance' of bacteria reached maximum values one week after of water bloom break.
6

Cyanophyta blooms in Koronowski Reservoir in the background of environmental conditions

63%
Wisniewska M.
Oceanological Studies
|
1998
|
vol. 27
|
issue 1
45-52
EN
On the basis of floristic analysis, the occurrence of 132 taxons of plankton algae in Koronowski Reservoir was determined. The spring and autumn plankton was dominated by diatoms, while summer plankton by blue-green algae. The species composition, structure of the abundance of algae and concentration of chlorophyll as well as physicochemical conditions of water suggested a highly eutrophic character of this reservoir with a starting expansion of blue-green algae, mainly species considered to be toxic.
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