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First record of Prestauroneis tumida Levkov and accompanying species in Poland

Rakowska B., Szczepocka E., Żelazna-Wieczorek J., Olszyński R. M.

Oceanological and Hydrobiological Studies

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2017

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Vol. 46, No. 1

30--37

EN

The paper presents morphological and ecological characteristics of Prestauroneis tumida Levkov recorded for the first time in Poland. The diatom Prestauroneis tumida Levkov was found in the microbenthos of the Czarna Staszowska River (left tributary of the Vistula River, south-eastern Poland). This diatom species was present in the upper section of the river (sampling sites: 1 – Drogowle, 2 – Raków) where saprobic state varied from oligosaprobic to beta-mesosaprobic. Dimensions of the valve were as follows: length 30-44 µm, width 8-11 µm and 13-16 striae in 10 µm. Our research updates the morphological diversity data such as measurements of valves in terms of width and the number of striae. The accompanying species of Prestauroneis tumida belonged to the group of good water quality indicators, from oligo- to mesosaprobic ones. Some of the identified species were indicators of alkaline, calcium-rich waters.

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Diatoms in the biological assessment of the ecological state of waters using the Czarna Staszowska River as an example

Szczepocka E., Rakowska B.

Oceanological and Hydrobiological Studies

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2015

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Vol. 44, No. 2

254--266

EN

The object of the present research was the Czarna Staszowska River, which is located in south-eastern Poland and which is a left tributary of the upper Vistula River. The length of the river is 61 km and its sources are situated in the Świętokrzyskie Mountains. The river flows across an area covered by Mesozoic rocks, mostly carbonate and sulfate ones. The upper and middle course of the river is of natural character, while increased pollution occurs downstream of the Chańcza Reservoir. In the present study, the water quality of the Czarna Staszowska is investigated in the pure and polluted sections using diatom indices, such as IO − Diatom Index, IPS − Specific Pollution Sensitivity Index, GDI − Generic Diatom Index and TDI − Trophic Diatom Index. In the four river sections distinguished on the basis of the hydrology and the degree of water pollution, the occurrence of different indicator species was determined in the respective diatom assemblages. Indicator species were determined, i.e. characteristic of oligosaprobic and mesosaprobic, limestone and silicon-rich waters. Also taxa indicating an increased trophic status of the river (occurring in its polluted sections) were identified.

3

Diatomological aspects of the Fenn’s and Whixall Mosses complex (Shropshire, UK)

Szulc K., Besenyei L., Szulc B., Rakowska B.

Oceanological and Hydrobiological Studies

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2014

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Vol. 43, No. 3

274--282

EN

Peat bogs are unique and important habitats for biodiversity at the species and ecosystem level where low pH of water plays a major role. The main objective of the present study was to compare the benthic diatom assemblage structure of the selected part of the Fenn’s and Whixall Mosses complex in order to verify whether selected sampling sites differ from each other. The complex is a cut-over, lowland raised mire, which is a National Nature Reserve (NNR) and a Site of Special Scientific Interest (SSSI). Altogether 92 diatom species were identified in 72 benthic samples collected between September 2008 and August 2009 from six selected sampling sites. Statistical cluster analysis was used to classify diatom samples and to observe the structure of diatom assemblages. The results of this analysis grouped the data set into 3 clusters with 24 samples from each of the two sampling sites in one cluster. Such a clear division shows that pH of water has an impact on the species composition, the richness and diversity of benthic diatom assemblages.

4

Diatom indices in the biological assessment of the water quality based on the example of a small lowland river

Szczepocka E., Szulc B., Szulc K., Rakowska B., Żelazna-Wieczorek J.

Oceanological and Hydrobiological Studies

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2014

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Vol. 43, No. 3

265--273

EN

The aim of the study was to compare the biological analyzes of the Linda River (Central Poland), which were based on three diatom indices: IO, GDI and IPS in order to select the best diatom index for the biological assessment of the lotic water quality. Additionally, the summary of the selected results of the biological and chemical analyzes was presented to show how precise the biological analyzes are as a basic tool in the assessment of the ecological status of the lotic waters. The results showed that each of the indices assessed the water in the Linda River to a specific but different quality class. The IO index showed class II of the water quality, while the IPS and GDI - class III. Statistical analysis conducted with the nonparametric Kruskal-Wallis test for independent samples (Kruskal, Wallis 1952) showed that differences in the values of individual indices at different sites were not statistically significant. It should be noticed that the IPS and GDI indices gave values that classify the water in the Linda River at least one class below. The obtained results confirmed that the biological methods are most reliable in the assessment of the water quality. These methods are less sensitive to a single impact of the environmental factors, therefore they permit accurate determination of the ecological status of the water ecosystems.

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Algae assemblages in the Rąbień peat-bog reserve

Rakowska B., Sitkowska M.

Oceanological and Hydrobiological Studies

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2010

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Vol. 39, No.2

63-74

EN

Due to anthropogenic stress, the character of the Rąbień peat-bog reserve is changing, and large parts of it are being transformed into a transitional peat-bog. During more than 23 years of research, considerable changes have been noted in water pH (from 4.63 to 6.64), trophic status, and the species composition of algae. The subject of the research carried out in 2004-2005 were Bacillariophyceae and Chlorophyta. A decrease was observed in the number of species characteristic of high peat-bogs in favor of alkaliphilic species and those occurring in eutrophic waters.

6

Cyanobacteria water blooms associated with various eukaryotic algae in the Sulejów Reservoir

Rakowska B., Sitkowska M., Szczepocka E., Szulc B.

Oceanological and Hydrobiological Studies

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2005

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Vol. 34, No.1

31--38

EN

The Sulejów Reservoir is a lowland dam reservoir that was constructed in 1973 on the Pilica River at the village of Smardzewice. It is 15.5 km long and has an elongated, trough-like shape. It is characterized by a low depth (mean - 4.5 m), and its mean annual retention time ranges from a dozen to four dozen days. The reservoir is strongly eutrophic due to large loads of phosphorus and nitrogen entering its catchment area. Since the creation of the reservoir, strong water blooms have been caused by Aphanizomenon flos-aquae, Anabaena flos-aquae, Microcystis aeruginosa, and Microcystis wessenbergii. These blooms were associated with the intensified development of green algae, mainly of the genera Coelastrum, Dictyosphaerium, Pandorina, Pediatrum, and Scenedesmus. Beside the blue-green and green algae, the diatoms were the richest in species, of which Asterionella formosa, Aulacoseira granulata, Cyclotella meneghiniana, Diatoma tenuis, Fragilaria capucina, F. Pinnata, F. Ulna, Melosira varians, and Stephanodiscus hantzschii constantly dominated. These three groups were accompanied by Dinobryon sertularia, Ceratium hirundinella, and Peridinium inconspicuum.

7

Benthic diatoms in polluted river sections of Central Poland

Rakowska B.

Oceanological and Hydrobiological Studies

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2004

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Vol. 33, No. 1

11--21

EN

Water quality was investigated in the most polluted sections of three rivers in Central Poland: the Rawka, Jeziorka and Bzura. The estimate was carried out using the Lange-Bertalot indicatory method, which is based on various diatom tolerances to pollution, and by calculating the saprobity index of Pantle & Buck. In the investigated rivers, Cocconeis pediculus, C. placentula, Fragilaria construens, F. pinnata, Gomphonema olivaceum, Melosira varians, Meridion circulare, Navicula lanceolata were the most frequent dominants of species sensitive to pollution. The most frequent tolerant species were Achnanthese lanceolata ssp. frequentissima, Cymbella silesiaca, Fragilaria capucina var. vaucheriae, F. ulna, Navicula capitata var. capitata, N. gregaria, N. pupula, and Nitzschia amphibia. The dominants of the resistant group were Gomphonema parvulum, Navicula saprophila, N. veneta, and Nitzschia palea. On the basis of the methods mentioned above, the water of the Rawka River was assigned to water quality class II/II-III, that of the Jeziorka to class II-III/III and that of the Bzura (at both study sites) to class II-III.

8

Doświadczenia zakładów energetycznych z eksploatacji napowietrznych linii z przewodami izolowanymi

Rakowska B., Grzybowski A., Tomczykowski J.

Prace Naukowe Instytutu Podstaw Elektrotechniki i Elektrotechnologii Politechniki Wrocławskiej. Konferencje

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2000

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Vol. 36, nr 11

345-352

PL

Przedstawiono doświadczenia kilkudziesięciu Spółek Dystrybucyjnych z eksploatacji napowietrznych linii niskiego i średniego napięcia z przewodami izolowanymi i w osłonie izolacyjnej.

EN

The paper contains the analysis of general data on experiences of low and medium voltage insulated or covered overhead lines serviced by Polish Utilities.

9

Dynamics of blue-green algae development in Sulejów dam reservoir

Galicka W., Lesiak T., Rakowska B.

Oceanological Studies

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1998

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Vol. 27, No. 1

21-26

EN

Phytoplankton of Sulejow Reservoir was investigated in 1979-1993. Over that period, blue-green algae were usually a constant component of phytoplankton. Their percentage in the total phytoplankton biomass widely varied both from season to season and from year to year. Maximum values were noted in summer, although sometimes a shift of peak development toward spring or even winter was observed. The development was not uniform in the whole area of the reservoir; blue-green algae dominated in the middle and downstream, that is in the deepest parts of the reservoir. The main components of phytoplankton included Microcystis aeruginosa Kţtz. and Aphanizomenon flos-aquae (L.) Ralfs.