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1

Malacofauna in oxbow lakes of the Bug River within the Nadbuzanski Landscape Park

100%
Jakubik B., Lewandowski K.
Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego
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2013
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tom 10
2

Effects of a floodplain lake restoration on macroinvertebrate assemblages - a case study of the lowland river (the Slupia River , N Poland)

84%
Obolewski K., Glinska-Lewczuk K., Strzelczak A., Burandi P.
Polish Journal of Ecology
|
2014
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tom 62
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nr 3
A study on the response of macroinvertebrate assemblages to the restoration of hydrological connectivity of an oxbow lake through the channel excavation is presented. The study included a five-year environmental monitoring (hydrological, hydro-chemical measurements and invertebrate sampling) carried out in the years 2008–2009 and 2011–2012 in the floodplain of the Słupia River (N Poland). The results allowed for assessing ecological effects of the hydrotechnical treatments (re-opening of an old river bed, declogging and installation of wooden deflectors) applied in the oxbow restoration. The results confirmed the preliminary hypothesis that the level of hydrological connectivity determines the dynamics of invertebrate fauna communities in river-floodplain systems. Analysis of the data revealed that such reconnection considerably influenced the structure of hydrobionts by altering abiotic habitat conditions. Effects of radical changes in the habitat morphology and hydrodynamic conditions and monitoring of macroinvertebrate assemblages preformed in the restored lake indicated a significant instability of the ecosystem soon after the treatment, what was confirmed by the results of canonical analysis, in which 50% of the total variance remained unexplained. Among factors analysed, water quality parameters explained 21.4% of the total variance in macroinvertebrate communities. However, the hydrobionts showed a significant instability with respect to variable hydrological conditions (flow through the lake) what contributed to a low share of water flow along the oxbow in explaining the total variance. The analysis of long-term changes that occurred in the studied ecosystem showed that the restoration of full hydrological connectivity brought only a short-term increase in benthofauna abundance. The most distinct reorganization in the structure of macroinvertebrate communities was observed in the first year after the reconnection while the consecutive four years brought only insignificant changes, mainly the appearance of a few species, mainly molluscs. Our investigation suggests that the taxonomic composition of macroinvertebrates in the studied oxbow lake having the only one-arm opening, before the improvement of hydrological connectivity, seemed to be more stable and optimal for this kind of habitat, than after the hydrotechnical works, when the ecosystem became passable due to both-arms connections to the river channel. Therefore, semi-lotic oxbows, connected to parent rivers only with one arm, can be properly functioning aquatic ecosystems in river floodplains.
3
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A new record of an alien species, trumpet ram’s-horn, Menetus dilatatus (Gould, 1841) (Gastropoda: Planorbidae) in Poland

84%
Kolodziejczyk A., Lewandowski K.
Folia Malacologica
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2015
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tom 23
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nr 2
4

The effect of dense patches of Stratiotes aloides L. on the spatial structure of microcrustacean assemblages in an oxbow lake

84%
Strzalek M., Koperski P.
International Journal of Ecohydrology and Hydrobiology
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2019
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tom 19
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nr 1
5

Effect of hydrological connectivity on the molluscan community structure in oxbow lakes of the Lyna River

84%
Obolewski K., Glinska-Lewczuk K., Kobus S.
Oceanological and Hydrobiological Studies
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2009
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tom 38
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nr 4
75-88
6

MRandCT analysis of the qualitative and quantitative structure of macrozoobenthos in selected oxbow lakes of Northern Poland

84%
Obolewski K., Strzelczak A.
Oceanological and Hydrobiological Studies
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2008
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tom 37
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nr 3
97-104
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

The use of a geochemical method in the detection of groundwater discharge to floodplain lakes

84%
Glinska-Lewczuk K., Burandt P., Banaszek Z., Chormanski J., Slapinska M., Timofte C., Serwotka L., Sawczyn J., Jarzab N.
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
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2013
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tom 17
Water quality parameters of floodplain lakes may be indicative of the intensity of groundwater recharge. The main assumption made in the study is that the direct influence of groundwater recharge is reflected in the vertical gradient of temperature and aeration along the whole water column. Considering this, we seasonally monitored physical and chemical properties of 22 oxbow lakes in postglacial river valleys (the Słupia, Drwęca and Łyna rivers) in temperate climate zone in the southern watershed of the Baltic Sea (N Poland). The results were compared with groundwater samples from transects of piezometers located near the floodplain lakes. The floodplain water bodies showed variability (both in vertical and spatial dimensions) in temperature, aeration and electrolytic conductivity, affected mainly by different sources of water supply. The temperatures and dissolved oxygen contents declined not only with the increasing depth of water and a distance from the river channel, but also a significant drop in the parameters’ values have been associated with groundwater recharge within the floodplain edge.
8

The effect of hydrological connectivity on water beetles fauna in water bodies within the floodplain of a lowland river (Neman River, Belarus)

84%
Pakulnicka J., Nowakowski J. J.
Oceanological and Hydrobiological Studies
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2012
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tom 41
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nr 2
9
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

An attempt at evaluating the influence of water quality on the qualitative and quantitative structure of epiphytic fauna dwelling on Stratiotes aloides L., a case study on an oxbow lake of the Lyna River

84%
Obolewski K., Glinska-Lewczuk K., Kobus S.
Journal of Elementology
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2009
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tom 14
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nr 1
119-133
The paper contains the results of a study on the dependence of the qualitative and quantitative structure of the phytophilous macrofauna dwelling on Stratiotes aloides L. (water soldier) on the quality of waters in a lentic oxbow lake of the £yna River. The observations were carried out during the vegetative season (April – June) 2006 at high and moderate water levels. During the study, a total of 18 taxa of invertebrates dwelling on the above plant species were identified, with the exact number of taxa varying in time: 11 taxa were noticed in April and May, and in June their number went up to 13. The examination of hydrochemical parameters of the oxbow lake waters revealed that the density of macrofauna was lower at higher values of proper conductivity and macronutrients, ammonia nitrogen and COD, increasing at high levels of sulphates. High concentrations of ammonia nitrogen and non-organic components coincided with decreased biomass of epiphytic animals on water soldier. Additionally, it has been observed that elevated concentrations of potassium ions have a negative influence on the biomass of most epiphytic animals (except Erpobdella sp.).
10

The significance of oxbow lakes for the ecosystem of afforested river valleys

84%
Koc J., Kobus S., Glinska-Lewczuk K.
Journal of Water and Land Development
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2009
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nr 13a
11

Fishes of three oxbow lakes and their parent Pilica River: 25 years later

84%
Penczak T., Kruk A., Koszalinski H., Kostrzewa J., Marszal L., Galicka W., Glowacki L.
Polskie Archiwum Hydrobiologii
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2000
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tom 47
|
nr 1
12

Bivalves of the family Unionidae in ox-bow lakes of the Bug River

67%
Lewandowski K.
Fragmenta Faunistica
|
2006
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tom 49
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nr 1
13
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

New and rare species of Volvocaceae (Chlorophyta) in the Polish phycoflora

67%
Dembowska E. A.
Acta Societatis Botanicorum Poloniae
|
2013
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tom 82
|
nr 4
Seven species of Volvocaceae were recorded in the lower Vistula River and its oxbow lakes, including Pleodorina californica for the first time in Poland. Three species – Eudorina cylindrica, E. illinoisensis and E. unicocca – were found in the Polish Vistula River in the 1960s and 1970s, as well as at present. They are rare species in the Polish aquatic ecosystems. Three species are common both in the oxbow lakes and in the Vistula River: Eudorina elegans, Pandorina morum and Volvox aureus. New and rare Volvocaceae species were described in terms of morphology and ecology; also photographic documentation (light microscope microphotographs) was completed.
14

An attempt at modelling the periphyton dynamics with artificial neural networks exemplified by the oxbow lake reopening study (The Slupia River, Northern Poland

67%
Obolewski K., Strzelczak A.
Ecological Questions
|
2008
|
tom 10
An experiment was performed in the Osokowy Staw oxbow lake (the Słupia River, northern Poland). The old riverbed was reconnected with the riverine system and periphyton communities on nylon artificial substrate were surveyed before and after engineering works. Then, ANN (Artificial Neural Network) architectures were designed and trained in order to create models of interactions between 18 macrozooperiphyton, microzooperiphyton and phytoperiphyton taxa in the changing ecosystem. Calculations were performed using StatSoft Software Statistica 6.1 with the implemented neural network module.Neural network models allowed a quantitative insight into periphyton dynamics and indicated trophic relationships, both predatoryprey and competitive. Thus, we see ANN as a good technique for modelling multidimensional, nonlinear relations between epiphytic organisms and as a promising method for creating overall models.
15

Invertebrate reproduction in astatic water bodies: egg number - body weight relationship in Viviparus viviparus (L.) from oxbow lakes

67%
Jakubik B.
Polish Journal of Ecology
|
2012
|
tom 60
|
nr 2
Reproduction is the most important factor in population dynamics and invading freshwater habitats by Viviparus viviparus. This is largely associated with ovoviviparity of these snails. Some traits like steered reproduction, the appearance of young snails during the whole year, protection of embryos by female and delayed reproduction were fixed by natural selection as adaptations increasing the chance for progeny survival. In variable habitats like oxbow lakes seasonally joined to the river channel, Viviparidae start reproducing in the early stage of their life hence increasing a chance for population to survive. Studies on fecundity, embryonic development of V. viviparus and the relationships between these parameters and females’ body size and weight, were carried out in oxbow lakes periodically connected to the river (the Bug River, Central Poland). The Bug River is one of a few European rivers which preserved their nearly natural character. No larger hydrotechnical works have been made in its valley, therefore, the river flows in a natural, meandering channel and forms numerous oxbow lakes. The surrounding of studied oxbow lakes is flat and of lowland character with mixed land use structure (arable lands, grasslands, settlements). Oxbow lakes are fed by the runoff from flood terrace, hence their waters are more fertile than those of the river. Two lakes were selected: Lake Szumin, area 17 ha, Lake Wywłoka – area 23 ha. Maximum depth of both lakes is ca 3 m. Samples of V. viviparus were collected in the years 2003–2007 with a bottom drag during the successive seasons from five sites in each oxbow lake. The embryos were found in females of the II (8.1–12.0 mm of width and height), III (12.1–20.0 mm width and 12.1–25.0 mm height) and IV (over 25.0 mm height and over 20.0 mm width) size classes. Three developmental stages were distinguished in embryonic growth: the oval transparent egg capsules (called the youngest embryos), egg capsules with visible contour of a shell (called medium embryos) and snails with a shell (the oldest embryos). The youngest growth stages of embryos (in a form of oval transparent egg capsules) dominated in all size classes of females. Medium growth stages (egg capsules with visible outlines of the shell) and the oldest ones (with shell) were represented in smaller proportion. The highest number of the youngest embryos per female were found in females of the II size class. The proportions of the embryo growth stages varied seasonally. The number of embryos per female and the degree of their development increased with the increase of shell (height, width, dry weight) and body (dry weight) parameters. High fecundity of the youngest females of V. viviparus is probably an adaptation to unstable habitat conditions of oxbow lakes.
16

Composition and density of plant-associated invertebrates in relation to environmental gradients and hydrological connectivity of wetlands

67%
Obolewski K.
Oceanological and Hydrobiological Studies
|
2011
|
tom 40
|
nr 4
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