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Long-term changes in the phytoplankton of Lake Charzykowskie

Wiśniewska M., Luścińska M

Oceanological and Hydrobiological Studies

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2012

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Vol. 41, No. 3

90-98

EN

The research on phytoplankton communities in Lake Charzykowskie was carried out at intervals since the 1940s till the beginning of the 21 century. Long-term observations, initially of the species composition and in the following years also of the biomass and the concentration of chlorophyll-a in relation to habitat conditions, allowed to assess the impact of the catchment area on changes in the trophic status of the lake for over 50 years. And thus, based on the results of physicochemical analysis and studies on the phytoplankton structure in the 1940s, the lake was classified as ß-mesotrophic (Cabejszek 1950), between the 1960s and the1990s as eutrophic (Szulkowska-Wojaczek 1968, 1976; Wiśniewska 1994, 2000), in 2004 as hypertrophic (Wiśniewska 2005), and in 2008 and 2009 as meso-eutrophic.

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Phytoplankton of the Szczecin Lagoon (the Great Lagoon)

Luścińska M

Oceanological and Hydrobiological Studies

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2005

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Vol. 34, No.1

3--29

EN

The 315 species of plankton algae in the Szczecin Lagoon consist mainly of freshwater algae flora. Only a few of them are characteristic for brackish waters. Diatoms and coccal green algae are represented by the highest number of species, whereas the blue-green algae are less heterogeneous. The results of studies were compared with data obtained in the 1950s, 1960s, and 1970s, and, despite fluctuations in the number of species, the contribution structure of particular systematic phytoplankton groups was remarkably similar.

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Algae in plankton and muddy sediments as well as in a food content of the larvae Chironomus F.L. Plumosus (L.) of the Szczecin lagoon (The Great Lagoon)

Wolnomiejski N., Luścińska M, Grygiel I.

Oceanological Studies

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2000

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Vol. 29, No. 2

43-56

EN

Species composition of the algae as well as frequencies of their occurrence in a food content of the Chironomus larvae were usually showing a distinctive correlation to the plankton algae rather than to the algae from the mud sediments surface. The main food of the larvae was a filtered phyto-plankton matter decomposed by bacteria. In the reolimnian part of the Lagoon with the sedimentation of the dead phytoplankton restricted by a water-flow, there were poor feeding conditions for the benthos. The main factor that restricted the quantitative growth of the chironomids larvae in that part of the Lagoon was largely because of their feeding on the algae from the sediments.

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Algal communities of humic acid sites: biomass and diversity in lake water versus peat-mat water

Luścińska M., Soska R.

Polish Journal of Ecology

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1998

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Vol. 46, no 2

123-135

EN

In the water of a humic lake, and in the peat-bog surrounding it, there were recorded 70 taxa of algae: Cyanophyta, Pyrrophyta, Cryptophyta, Chrysophyta, Euglenophyta and Chlorophyta. In the peat-bog water a higher variety of species and algal biomass was observed than in the lake water. The relatively low biomass of algae in the lake water, was produced by few nanoplanktonic species, i.e. mixotrophic flagellates from Cryptophyta, Pyrrophyta and Chrysophyta.The comparatively higher biomass was formed by peat-bog algae, both in the nearest neighbourhood of the lake and in the bog pine forest. Community of algae from the peat-bog differs also according to the distance from the lake.