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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Variability of zinc content in soils in a postglacial river valley – a geochemical landscape approach

100%
Glinska-Lewczuk K., Bieniek A., Sowinski P., Obolewski K., Burandt P., Timofte C. M.
Journal of Elementology
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2014
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tom 19
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nr 2
The paper presents the research results on the relation between the contents of total zinc and its bioavailable form (Zn) and physicochemical properties of soil carried out along three catenas in the postglacial valley of the middle Łyna River, in NE Poland. We focused on topographical factors to determine the amount of Zn in the soil in relation to specific geochemical landscape types. The analyzed soil showed a relatively low level of soil pollution with Zn and did not exceed the threshold values for soil contamination with Zn. The average Zn content amounted to 45.75 mg kg -1 d.m. and ranged from 8.80 to 176.26 mg kg -1 d.m. The heavy metal content in the soil was related to organic matter and clay fraction, while it was inversely proportional to the share of sandy fraction. Distribution of zinc showed variability due to factors derived from topography, soil heterogeneity in the river valley as well as fluvial processes taking place within the floodplain. Different geochemical landscapes showed depressive trends in both Zn and Zn contents along the catenas. It diminished from eluvial to transeluvial landscapes and increased again to superaqual landscape. Depressions after former river channel were favorable for the Zn accumulation. The most abundant in Zn were upper horizons of Fluvisols in superaqual landscape (45.12 mg kg –1 ) filling overgrown and terrestialized floodplain lakes. The share of Zn a was the highest in organic horizons of Fluvisols and achieved 51.4% of total Zn. The nature and power of functional links between the heavy metal mobility and the soil properties were determined with multivariate statistics and GAM models. Applied ordination statistics confirmed its usefulness in soil factor analyses.
2

Effects of hydrological and physicochemical factors on phytoplankton communities in floodplain lakes

84%
Grabowska M., Glinska-Lewczuk K., Obolewski K., Burandt P., Kobus S., Dunalska J., Kujawa R., Gozdziejewska A., Skrzypczak A.
Polish Journal of Environmental Studies
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2014
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tom 23
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nr 3
The fate of phytoplankton communities in different hydrological and hydrochemical conditions was studied in the middle basin of the Biebrza River (NE Poland). Our results showed that hydrological connectivity significantly influenced phytoplankton abundance in floodplain lakes: minimal abundance was stated in lotic and maximal in lentic waterbodies. Phytoplankton diversity and species richness were related to changes in water levels. During the low-water phase, phytoplankton biodiversity was the lowest in lentic and the highest in lotic lakes. High water levels promoted exchanges in species among waterbodies and the river, which increased biodiversity indices. We concluded that the isolation of any floodplain lake from the river channel deteriorates its trophic conditions. Thus, the decrease in phytoplankton biodiversity in floodplain lakes should be regarded as an indirect feedback of the hydrobionts on the hydrological factors.
3
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.
4

Benthic invertebrates in floodplain lakes of a Polish river: Structure and biodiversity analyses in relation to hydrological conditions

68%
Obolewski K., Glinska-Lewczuk K., Jarzab N., Burandt P., Kobus S., Kujawa R., Okruszko T., Grabowska M., Lew S., Gozdziejewska A., Skrzypczak A.
Polish Journal of Environmental Studies
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2014
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tom 23
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nr 5
Our study was carried out in the middle basin of the Biebrza River (NE Poland) in the periods of June and September in 2011 and 2012. From among numerous side-arms, four objects have been selected for analyses of macrozoobenthos structure and biomass. Two lakes exhibited a lentic character due to a long-lasting isolation from the river channel, one presented a lotic, and one was of a semi-lotic character. Differentiated hydrological conditions within the study period enabled comparative studies: in 2011 appeared low and high water levels, while in 2012 no low water appeared and high water levels prevailed, which influenced the wetland conditions and inhabiting aquatic zoocenoses. During the study 352 individuals of benthic invertebrates with a total biomass of 288 g of wet weight were collected. Among the studied lakes we found the highest values of biodiversity indices in a lotic reservoir, while the highest densities and biomasses were in a semi-lotic reservoir. Nevertheless, the composition and abundance of benthic invertebrates in the studied lakes differed significantly from type-specific communities found in the floodplain lakes in other regions. A substantially lower level of macrozoobenthos diversity in floodplain lakes of the Biebrza River is indicative of less favorable conditions for macrozoobenthos development due to frequent water level fluctuations.
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