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The in situ influence of Ceratophyllum demersum on a phytoplankton assemblage

Pełechata A., Pełechaty M.

Oceanological and Hydrobiological Studies

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2010

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Vol. 39, No.1

95-101

EN

The aim of this work was to present a quantitative and qualitative analysis of a phytoplankton assemblage under the influence of Ceratophyllum demersum L. during a two-year field study. Literature data obtained under laboratory conditions indicate that C. demersum may cause a decrease in the blue-green algae biomass, which is considered to be evidence of the significance of allelopathy. The observations reported in the current paper indicated that there was no clear effect on cyanoprokaryota whereas decreases in the quantity of Cryptophyta, Dinophyta, Chlorophyta, and Chrysophyceae are noted.

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Cyanoprokaryota of shallow lakes of Lubuskie Lakeland (mid-western Poland)

Pełechata A., Pełechaty M., Pukacz A.

Oceanological and Hydrobiological Studies

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2006

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Vol. 35, No.1

3-14

EN

In the summer seasons 2001 - 2004, water samples were collected in 25 shallow lakes in the area of the Lubuskie Lakeland (mid-western Poland). These investigations were the first detailed studies of phytoplankton in this part of Poland. A total of 73 taxa of Cyanoprokaryota were found. Two water blooms of Cyanoprokaryota were documented, with extremely high biomass in one of them. Water blooms were caused by Planktothrix agardhii, Anabaena flos-aquae and Pseudanabaena limnetica. The genus Anabaena represented the highest number of species. The occurrence of an invasive Cyanoprokaryota species - Cylindrospermopsis raciborskii - was detected in two lakes with the highest biomass of cyanoprokaryotic algae (where the above-mentioned blooms were observed).

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Vertical distribution of dominant cyanobacteria species in three lakes - evidence of tolerance to different turbulence and oxygen conditions

Wojciechowska W., Poniewozik M., Pasztaleniec A.

Polish Journal of Ecology

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2004

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Vol. 52, nr 3

347-351

EN

The composition and abundance of cyanobacteria in three lakes of the Polesie Lubelskie (East Poland) were studied in summer periods. Vertical distribution of these algae was analysed in two depths - in epilimnion and deoxygenated metalimnion. Species composition and domination was similar for these two sites. It means that the species like: Limnothrix planctonica (Wołosz.) Meffert, Limnothrix redekei (Van Goor) Meffert, Planktothrixs agardhii (Gom.) Anagn. et Kom., Woronichinianaegeliana (Unger) Elenk. and Microcystis viridis (A. Braun in Rabenhorst) Lemm. are not affected by turbulence of water as well as by oxygen conditions.

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Microorganisms in selected sulphuric springs of the Polish Carpathians

Rajchel L., Rajchel J., Wołowski K.

Geological Quarterly

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2002

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Vol. 46, No 2

189-198

EN

Microorganisms colonising sulphurous waters were found at the bottoms of the spring niches and along spring outflows. Five springs from the Carpathians and two from the Carpathian Foredeep were selected for investigations. Sulphurous flora is represented mainly by sulphuric bacteria. They occur as individual threads, spider-webs, festoons, encrustations and covers. Their colours may be white, creamy, violet, pink and purple. Altogether 31 microorganism taxa: bacteria (16), cyanoprokaryota (3) and algae (12) were identified and illustrated. The bacterial occurrences have been correlated with physico-chemical state of the waters.