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Diversity of the Rhopalodiaceae Diatoms (Bacillariophyta) on Macrophytes of Different Architecture in Small and Shallow Oxbow Lakes (SE Poland)

Rybak Mateusz, Kochman-Kędziora Natalia, Pęczuła Wojciech

Journal of Ecological Engineering

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2020

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Vol. 21, nr 5

164--173

EN

The research was conducted in July 2018 on six oxbow lakes of the San River. A total of 21 samples from various macrophyte species were collected. Over 400 species of diatoms were identified in the analyzed materials, 9 of which belonged to the Rhopalodiaceae family. Most of these Epithemia and Rhopalodia species developed as dominants in most of the studied samples. One of reported species – Epithemia selengaensis Vishnyakov, Kulikovskiy & Genkal was first time reported from Poland. The aim of the study was to present the taxonomic diversity of the representatives of the Rhopalodiaceae family growing different macrophyte species in oxbow lakes in the summer aspect.

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Distribution of epiphytic algae on macrophytes of various ecological groups : the case study of water bodies in the Dnieper River basin

Klochenko P., Shevchenko T.

Oceanological and Hydrobiological Studies

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2017

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Vol. 46, No. 3

283--293

EN

The generalization and analysis of original data have shown that the nature of epiphytic algae distribution on higher aquatic plants, representing different ecological groups, is very similar in various types of numerous water bodies in the Dnieper River basin. Their species richness and values of quantitative indices were mostly higher on submerged plants compared to plants of other ecological groups. The number of epiphytic algae species was 1.1-1.7 times higher on submerged plants compared to that on half-submerged plants and 1.6-3.1 times higher compared to plants with floating leaves. The taxonomic structure and species composition of epiphyton were very similar on half-submerged and submerged plants and moderately similar on plants with floating leaves compared to macrophytes of other ecological groups. It is emphasized that the specificity of epiphytic algae distribution on macrophytes of various ecological groups should be taken into account when performing monitoring and assessment of the ecological status of water bodies by the bioindication method.

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Distribution pattern of epiphytic microcrustaceans in relation to different macrophyte microhabitats in a shallow wetland (Upo wetlands, South Korea)

Choi J.-Y., Kim S.-K., Jeong K.-S., Joo G.-J.

Oceanological and Hydrobiological Studies

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2015

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Vol. 44, No. 2

151--163

EN

Macrophytes determine the physical complexity of aquatic environments and provide a suitable habitat for colonization by microcrustaceans. We evaluated the effects of a seasonal growth pattern and structure of macrophyte species on epiphytic microcrustaceans collected from macrophyte surfaces (stems and leaves) in shallow wetlands from May 2011 to October 2012. In 2011, epiphytic microcrustaceans that preferred free-floating macrophytes (Spirodela polyrhiza and Salvinia natans) and submerged macrophytes (Potamogeton crispus and Ceratophyllum demersum) were affected by the seasonal growth of these species. Epiphytic microcrustaceans were abundant on the surface of Spirodela polyrhiza in June and August and on Salvinia natans in September and October. In 2012, epiphytic microcrustaceans preferred submerged macrophyte species over the free-floating ones. The results of stable isotope analysis showed that epiphytic microcrustaceans depend on epiphytic particulate organic matter (EPOM) from each macrophyte species rather than on suspended particulate organic matter. Small species (Coronatella rectangula, Pleuroxus laevis, and Chydorus sphaericus) used EPOM (dominated by epiphytic algae) on free-floating and submerged macrophyte species; however, relatively larger species (Ilyocryptus spinifer and Macrothrix rosea) used EPOM only from submerged macrophytes. Based on these findings, we conclude that the distribution of epiphytic microcrustaceans is determined by seasonal characteristics, morphology of macrophyte species, and abundance of food resources.

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Assessment of the ecological state of the Kiev Reservoir by the bioindication method

Klochenko P., Shevchenko T., Barinova S., Tarashchuk O.

Oceanological and Hydrobiological Studies

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2014

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Vol. 43, No. 3

228--236

EN

The ecological state of the Kiev Reservoir affected by intensive contamination as a result of the accident at the Chernobyl Nuclear Power Station in 1986 was assessed in terms of the species-indicators of epiphytic algae occurring in the fouling of higher aquatic plants. It has been found that inhabitants of slowly flowing and moderately warm waters, alkaliphiles, indifferent organisms in relation to water salinity, nitrogen-autotrophic taxa tolerating elevated concentrations of organically bound nitrogen, β-mesosaprobionts and eurysaprobes (in relation to organic contamination) and eutraphentic organisms (indicators of the trophic state) prevailed in phytoepiphyton of the Kiev Reservoir. As a result of comparison of the original results with literature data obtained prior to the accident, it has been found that over a span of about 30 years (from the 1970s–1980s to 2010–2013), the taxonomic structure of phytoepiphyton remained almost unchanged. At the same time, the intensity of eutrophication, alkalization, and thermofication processes increased.