Changes in the trophic status of lakes in the Suwałki Landscape Park (NE Poland)

Górniak, Andrzej; Więcko, Adam; Karpowicz, Maciej

doi:10.1515/limre-2016-0024

Cited by 9 publications

(10 citation statements)

References 11 publications

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“…Correlations made for the number of rotifer species versus trophic state indices and chemical (acc. to Górniak et al 2016) and biological data for the set of lakes studied in 2015 (Figs 2-5) revealed only four significant relationships. There was a significant (p = 0.009) relationship between trophic state index (TSI) calculated from mean values of total phosphorus and chlorophyll-a (acc.…”

Section: Resultsmentioning

confidence: 94%

Diversity of rotifer communities in lakes of the Suwalki Landscape Park

Ejsmont-Karabin

Górniak

Karpowicz

2016

Limnological Review

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Studies of summer rotifer fauna of 11 shallow and 6 deep lakes of the Suwałki Landscape Park were conducted in an aim to assess the role of lake depth and biotic and abiotic factors in determining the diversity of rotifer communities in lakes undergoing a natural rate of eutrophication not accelerated by anthropopression. Some differences were observed when the group of shallow lakes was compared with that of deep lakes. The former were more differentiated as regards a list of rotifer species, partly due to the high proportion of species with low frequency. Consequently, their faunal originality was markedly higher and values of the percentage similarity of rotifer communities were much lower than in deep lakes. Species richness of rotifer fauna was also dependent on the trophic state of the studied lakes, the character of a nutrient limiting primary production, as well as biomass of diatoms and green algae.

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Section: Resultsmentioning

confidence: 94%

Diversity of rotifer communities in lakes of the Suwalki Landscape Park

Ejsmont-Karabin

Górniak

Karpowicz

2016

Limnological Review

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“…Analysis of the mean values using the Kruskal-Wallis ANOVA test did not show that the conductivity differences between the time series considered were statistically significant (p = 0.154), similarly to the pair comparison (Mann-Whitney U test; p = 0.124). 1934-1935 and 1975 were estimated from the conductivity-bicarbonate statistical model based on data from [35,36] and [37], values for 2015 according to [43].…”

Section: Discussionmentioning

confidence: 99%

Spatial Differentiation and Multiannual Dynamics of Water Conductivity in Lakes of the Suwałki Landscape Park

Borowiak

Nowiński

2020

Water

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Water conductivity in 23 lakes of the Suwałki Landscape Park (SLP) was tested in the years 2012–2014. Conductivity profiles were made at the deepest place every two months between spring and autumn water mixing. The collected measurement data, supplemented with historical data, were used to identify factors that shape the spatial variability of water conductivity and to reconstruct its multiannual changes. The range of variability of the mean conductivity of surface water of the SLP lakes ranged from 178 to 522 µS cm−1. The strong negative relationship between conductivity and lake elevation (R = 0.816, p < 0.000) suggests that in the territorially compact complex of the SLP lakes, conductivity is a consequence of the location of the lake in the catchment, which, in turn, affects the structure of its water supply. However, the physical and environmental parameters of the catchment and morphometric parameters of lake basins are of secondary importance. In dimictic lakes and in those showing signs of “spring meromixis”, the magnitude of conductivity differences in the water column is determined by the lakes’ susceptibility to wind mixing expressed by the exposure index value. The developed climate models have also shown that conductivity, an indicator of water quality, is very sensitive to climate change. The analysis of the reconstructed chronological conductivity sequences shows that the deterioration of the quality of the waters of the SLP lakes first occurred at the beginning of the 21st century and a clear increasing trend has been maintained over the last decade.

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“…To evaluate the long-term trends of selected optical characteristics of SLP lake water, the unpublished results of the authors' hydro-optical measurements performed in the years 1997-2016 were used, together with the materials available in the literature (Koźmiński 1932;Stangenberg 1936Stangenberg , 1937Szczepański 1961;Gór-niak et al 2007;Zdanowski 2008;Jekatierynczuk-Rudczyk et al 2014;Górniak et al 2016).…”

Section: Research Area and Methodsmentioning

confidence: 99%

Comparative studies of underwater light regimes in lakes of the East-Suwałki Lakeland

Borowiak

2016

Limnological Review

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Secchi disc transparency and optical properties of water, based on measurements for downward irradiance using an underwater radiometer PER-700, were studied in 23 lakes of the Suwałki Landscape Park (SLP) in 2013. Measurements of optically significant constituents of water were also performed (YSI EXO-2) and analysed. Data on water transparency from published studies were used to assess long-term changes in the optical conditions in the deepest water body in Poland -Lake Hańcza. In terms of the optical characteristics of the water, the analysed SLP lakes can essentially be divided into two distinct groups representing different optical lake types. These are optical categories of lakes most common in Poland, namely types II and IIIb. Regional equations describing the relationships between the attenuation coefficient for downward irradiance as well as optically significant constituents of water were developed. The optical properties of the SLP lakes are mainly affected by suspended solids, mostly phytoplankton. Interannual fluctuations in Sechi disc transparency, as well as the attenuation coefficient for downward irradiance and other apparent optical properties of mid-summer water calculated from it, are determined by the spring thermal conditions and intensity of phytoplankton blooms during this period. Application of the attenuation coefficient for downward irradiance as a criterion for the assessment of the trophic status of the SLP lakes indicates that these are generally eutrophic lakes. The largest and deepest lakes of the park, however, are mesotrophic. Lake Hańcza is currently in the stage of α-mesotrophy.

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Changes in the trophic status of lakes in the Suwałki Landscape Park (NE Poland)

Cited by 9 publications

References 11 publications

Diversity of rotifer communities in lakes of the Suwalki Landscape Park

Diversity of rotifer communities in lakes of the Suwalki Landscape Park

Spatial Differentiation and Multiannual Dynamics of Water Conductivity in Lakes of the Suwałki Landscape Park

Comparative studies of underwater light regimes in lakes of the East-Suwałki Lakeland

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