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Morphometric parameter for an estimation of a throphic status of lakes

100%

Panasyuk V., Koshovyy V., Tzykhan O., Romanyshyn I.

Acta Agrophysica

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2002

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tom 68

2

Urea in lake ecosystem: the origin, concentration and distribution in relation to trophic state of The Great Mazurian Lakes (Poland)

86%

Siuda W., Kiersztyn B.

Polish Journal of Ecology

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2015

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tom 63

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nr 1

The distribution, concentrations and origin of urea were studied in surface and profundal waters of meso-eutrophic and highly eutrophic parts of The Great Mazurian Lake System (GMLS) during spring — autumn period. Urea concentrations varied from 0.25 µM in surface layer to 3.36 µM in profundal zone of studied lakes and were in the range of concentrations noted in other non-polluted freshwater habitats. In the photic zone of lakes of GMLS Urea N made up to 10 % the total DON pool and often exceeded 2-3 times of NH₄-N concentrations. Pattern of changes in urea concentrations observed during three-years study excludes external urea input and suggests supplementation of lake waters with this compounds by phytoplankton decomposition processes. Generally, urea concentrations were negatively correlated with the trophic state index calculated from “algal” as well as from “bacterial” determinants. However, more detailed analysis showed that the relationships between production and assimilation of urea by various plankton components as well as the ecological role of this compound in meso- and eutrophic lakes could be different.

3

New approach to trophic state assessment of running waters in Poland

86%

Neverova-Dziopak E., Kowalewski Z.

Meteorology Hydrology and Water Management. Research and Operational Applications

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2013

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tom 01

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nr 1

The problem of eutrophication has, since the 1970s, reached a global scale and become a problem of principal importance due to its negative consequences, which could result in the total loss of biospheric functions of aquatic ecosystems, and also their economic role. The increasing intensity of eutrophication processes and their specificity in various types of waters requires the development of special methods of control and protection of aquatic ecosystems. As a result of the high dynamism of eutrophication and its dependence on different factors (hydrological, hydrodynamic, hydrobiological, morphological, edaphic and climatic conditions), the assessment of trophic status in order to control and manage this process is very complicated. The evaluation of the consequences of anthropogenic eutrophication and the scale of its development can be provided only on the basis of systematic observation during a multi-annual period. Careful analysis of the state of knowledge on the issues related to eutrophication, especially the methods of trophic status assessment, have allowed us to conclude that at present there is no universal methodology for the assessment of the surface water trophic level, while the existing methods have various shortcomings, which reduce the reliability of the results and complicate the development of appropriate technical, organizational and legal protection measures. A critical analysis of trophic status assessment approaches for different categories of waters has also allowed us to state that there is no an appropriate method for the assessment of the trophic status of running waters, since almost all existing assessment methods are developed for lakes and coastal areas. This paper presents an original approach elaborated for the assessment of the trophic state of running waters based on the statistical analysis of long-term monitoring data and numerical criterion ITS, which allows for a simple and low-cost monitoring of eutrophication suitable for the solving of different application tasks in the field of surface water protection.

4

Periphytic ciliates in littoral zone of three lakes of different trophic status

86%

Mieczan T.

Polish Journal of Ecology

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2005

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tom 53

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nr 4

Periphytic ciliate communities were investigated in three lakes of different trophic status of the Łęczyńsko-Włodawskie Lake District (Eastern Poland). Observations were made of the periphyton growing on glass-slides. Samples were taken from April to November 2000–2001. Once a month, four periphyton samples were collected in littoral zone. Seventy three ciliate taxa occurred in the studied lakes. The biggest number, 60 species, was found in eutrophic lake, a little less, 55 species, in mesotrophic lake and the least, 49 species, in dystrophic lake. The lowest density was observed in mesotrophic lake and it was 13 × 10³ ind. m⁻², being a little higher in dystrophic lake – 16 × 10³ ind. m⁻², and the highest – 20 × 10³ ind. m⁻² in eutrophic lake. All of the studied lakes were generally dominated by ciliates belonging to the order Cyrtophorida (Chilodonella uncinata Ehrenberg 1983) constituted >30% of the total numbers. In all lakes bacterivorous ciliates occurred in the highest numbers (>50%), while algivorous and histophagous – in the lowest (<5%). In the eutrophic and dystrophic lakes the proportion of omnivorous and predatory species was high. The number of significant correlations differed among lakes. In mesotrophic lake the correlation between ciliates abundance and total organic carbon was found. In eutrophic lake total number of ciliates was positively correlated with the conductivity, TP and TOC. In dystrophic lake the correlations between ciliates abundance and abiotic parameters were not observed. In mesotrophic and dystrophic lakes the content of organic matter positively correlated with the biomass of ciliates, while in eutrophic lake conductivity showed positive correlation with their biomass.

5

Summer phytoplankton composition in 26 lakes of Leczna-Wlodawa Lakeland

86%

Wojciechowska W., Solis M., Pasztaleniec A., Poniewozik M.

Annales Universitatis Mariae Curie-Sklodowska. Sectio C, Biologia

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2002

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tom 57

6

Chitinolytic bacteria in two lakes of different trophic status

86%

Swiontek B. M., Donderski W.

Polish Journal of Ecology

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2006

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tom 54

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nr 2

This paper presents the results of research on the number of chitinolytic bacteria and chitinolytic activity of strains in the oligomesotrophic and the eutrophic lakes. Two lakes of soft and hard water and of different trophic status (in terms of nutrients contents) from Iławskie Lake District (North Poland) were choosen. The numbers of chitinolytic bacteria were higher in eutrophic lake (average 1.0 × 10³ cells cm⁻³) than in oligo-mesotrophic lake (average 0.5 × 10³ cells cm⁻³) as well as in littoral versus pelagic zone. However, a higher percentage of chitinolytic bacteria (average 13%) among the total numbers of heterotrophic bacteria was found in oligo-mesotrophic lake as well as higher rate of the chitinolytic activity of bacteria (7.0 versus 4.5 nmol GlcNAc mg⁻¹ protein h⁻¹ after 6 days of incubation). The possible shortage of dissolved organic compounds in mesotrophic lake was pointed up as the reason for using the dissolved chitin as the source of carbon and nitrogen. Enterobacter aerogenes (28%), Aeromonas sp. (25%) and Chromobacterium sp. (16%) dominated in oligo – mesotrophic lake. In eutrophic lake, the most numerous species were Aeromonas hydrophila (46%) and Aeromonas sp. (15%).

7

Surface microlayer in lakes of different trophic status: dissolved organic matter and microbial community

86%

Kostrzewska-Szlakowska I.

Polish Journal of Ecology

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2005

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tom 53

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nr 3

The aim of this paper was to recognize the abundance and frequency of occurrence of neustonic organisms (i.e. bacteria and algae) and accumulation of organic matter in the surface microlayer of three lakes of various trophic status. Water samples of surface microlayer (0.5–0.6 mm) were taken (with Larsson plate) as well as from respective epilimnion layer (0.5 m deep). The samples were collected from shallow, humic (Sphagnum bog) lake (L. Flosek), shallow, eutrophic (L. Zełwążek) and deeper, mesotrophic lake (L. Kuc) in the period May–October during several years. The ratio of the organisms’ density in the surface microlayer to that in deeper (0.5 m) layer was considered as the enrichment factor (Ef). Heterotrophic bacteria accumulation in the surface microlayer was more frequent in the humic lake (75% of samples), than in mesoand eutrophic lakes (64%). Mean Ef values for bacteria ranged from 1.3 to 1.4. Frequent, but not strong accumulation of dissolved organic matter measured as the absorbance A₂₄₅ was noted in the surface microlayer. Dissolved organic carbon (DOC) measured in automatic analyzer showed much stronger accumulation in microlayer, particularly in humic lake. Concentration of chlorophyll a in the surface microlayer was found as the most fluctuating and the highest mean Ef value was found in the mesotrophic lake (Ef = 6.3). An attempt was undertaken to explain these differences between the lakes in terms of variable ratio between allochthonous and autochthonous production in humic, mesotrophic and eutrophic lakes.

8

Zoobenthos of ecotonal zones in several lakes of different trophic status [The Region Polesie Lubelskie, Eastern Poland]

86%

Kornijow R., Radwan S., Tarkowska-Kukuryk M., Kahlan G.

Polish Journal of Ecology

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2003

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tom 51

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nr 2

The bottom fauna inhabiting two types of ecotones: 1) the transition zone between land and lake water, and 2) the border of a macrophyte bed and open water, situated in different types of littoral, distinguished mainly according to the structure and distribution of macrophytes was studied. The investigations were carried out in five harmonious lakes (from mesotrophic to highly eutrophic) and in one disharmonious (humoeutrophic) in July and September of 1996 and 1997. Both the species composition of zoobenthos and the relative abundance of the most numerous taxa (Tubificidae and larvae of Chironomidae) in ecotones did not seem to depend much on the type of littoral but rather upon the nature of the bottom sediments. The influence of lake fertility in harmonious lakes was clearly expressed mostly in the land-water ecotones where it was demonstrated by the drop of chironomids and increase in tubificids and predators in total faunal abundance with a rise of lake. trophism. The clear pattern in vegetation bed-open water ecotones concerned solely predators which contribution to the total faunal abundance tended to increase with a rise of lake trophic status. The ecotones of the disharmonious lake did not show much differences in comparison with the harmonious lakes except extremely low faunal density in vegetation-open water ecotone, being totally predominated by chironomids. In both harmonious lakes and in disharmonious one the highest faunistic similarities were found within the same types of ecotones, while the two types differed greatly.

9

Use of stable isotopes to delineate amphipod trophic status in Antarctic food webs

86%

Nyssen F., Brey T., Lepoint G., Bouquegneau J. M., De Broyer C., Dauby P.

Polskie Archiwum Hydrobiologii

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2000

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tom 47

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nr 3-4

10

Factors determining trophic state of Lake Skrzynka and its biocoenotic structure (Wielkopolski National Park)

72%

Klimaszyk P., Kuczynska-Kippen N.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2004

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tom 01

11

Trophic status of the Rusalka Lake in Szczecin in years 1999-2010

72%

Poleszczuk G., Bucior A., Tokarz M., Pierwieniecki J.

Zeszyty Naukowe. Acta Biologica. Uniwersytet Szczeciński

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2012

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tom 19

Trophic status of the Rusałka Lake wartes in inflow zone of Osówka Stream to Rusałka Lake reservoir in month April in years 1999, 2001, 2003, 2005, 2007 and 2010 – based on data of TP concentrations in water – was as hypertrophic determined, for except year 2007 whenas the thaw waters thinned the investigated waters that they waters were eutrophic. The added results with lead simultaneously with measurements concentrations TP the signs pH, concentration DO, COD-Cr as well as the concentrations NO3–, NH4+,TN, SRP and Ca2+and Cl – permitted on performance the general biotope characteristic of Rusałka lake water in early spring period in high exchange years and the proof, that the quality of investigated waters estimated on the basic of high exchange coefficients was stabilized, meanwhile the occurrence statistically significant differentiations the individual values of determined coefficients in next years in reference to year 1999 – was connected with changes weather influencing in changes size and date of rafting thaw waters.

12

Long-term changes in the dynamics and structure of cyanobacteria in Koronowo Reservoir

72%

Wisniewska M., Paczuska B.

Oceanological and Hydrobiological Studies

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2015

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tom 44

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nr 1

13

Changes in the trophic status of three mountain lakes - natural or anthropogenic process?

72%

Sienkiewicz E., Gasiorowski M.

Polish Journal of Environmental Studies

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2014

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tom 23

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nr 3

Three sediment cores have been studied from the Morskie Oko (MOK), Przedni Staw Polski (PSP), and Czarny Staw Gąsienicowy (CSG) lakes to examine the recent environmental history of the alpine lakes located in the Polish part of the Tatra Mountains (Carpathians). Changes in the total phosphorus concentration in the water over the past centuries were reconstructed based on diatom data (DI-TP), assuming that diatoms are good indicators of productivity in lakes. The results of the analysis showed significant alterations in the trophic status of the studied lakes over the past 50 years. Clear changes from oligotrophy to mesotrophy occurred in the lakes located close to year-round mountain huts on the shores of MOK and PSP. In contrast, DI-TP decreased in CSG, and the only symptom of higher productivity in the lake was an increase in total organic carbon.

14

Phytoplankton size structure and species composition as an indicator of trophic status in transitional ecosystems: the case study of a Mediterranean fjord-like karstic bay

72%

Bosak S., Silovic T., Ljubesic Z., Kuspilic G., Pestoric B., Krivokapic S., Vilicic D.

Oceanologia

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2012

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tom 54

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nr 2

The species composition and size-structure of the phytoplankton community in the Boka Kotorska Bay (SE Adriatic Sea) were analysed with respect to abundance and carbon biomass, together with the physico-chemical parameters, with the aim of evaluating the predefined oligo-mesotrophic status of this transitional water ecosystem. Three stations located in the inner part of the Bay were sampled with seasonal frequency in 2008/2009. Picophytoplankton cells were counted using flow cytometry; nanophytoplankton and microphytoplankton were identified and counted by light microscopy. The relative importance of the picoplankton in the Bay, in terms of both abundance and biomass, during all the investigated seasons emphasized their significance in the phytoplankton community. Picocyanobacteria (Synechococcus) constituted a significant part of the summer assemblages with regard to both abundance (up to 3.38 × 108 cells L−1) and carbon biomass (up to 73% of total phytoplankton carbon). The contribution of the nanophytoplankton was found to be generally low (<20% of the total phytoplankton carbon) in all seasons, and was dominated by autotrophic/mixotrophic flagellates. Species with a preference towards nutrient-enriched conditions, like the diatom Skeletonema marinoi, dominated the microphytoplankton fraction. S. marinoi was the most abundant in spring/winter (up to 2.86×106 cells L−1) above the halocline (making a 96% contribution to the microphytoplankton). The potentially toxin-producing diatom Pseudo-nitzschia pseudodelicatissima was recorded at abundances greater than 105 cells L−1, together with Thalassionema frauenfeldii, as well as the dinoflagellates Prorocentrum micans and the potentially harmful P. minimum. The higher values of phytoplankton biomass and the dominance of phytoplankton species or groups with preferences for nutrient-enriched conditions appear to be consistent with the oligo-mesotrophic status of this specific ecosystem.

15

Subfossil cladoceran fauna of three small hard-water lakes of different trophic status

72%

Suchora M., Kaczorowska A., Peczula W.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2014

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tom 11

16

Ecological and trophic status of two small hardwater lakes of the Lublin Upland with agricultural catchments

72%

Peczula W., Suchora M., Toporowska M.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2014

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tom 11

17

Are the changes in Dreissena polymorpha [Pall.] distribution in the Great Masurian Lakes related to trophic state?

72%

Stanczykowska A., Stoczkowski R.

Polskie Archiwum Hydrobiologii

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1997

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tom 44

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nr 4

18

Vegetation as an indicator of trophic status of running waters based on rivers of Great Britain and Northern Ireland

72%

Szoszkiewicz K.

Roczniki Akademii Rolniczej w Poznaniu. Rozprawy Naukowe

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2004

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nr 349

19

Rotifera of lake psammon: community structure Versus trophic state of lake waters

72%

Ejsmont-Karabin J.

Polish Journal of Ecology

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2003

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tom 51

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nr 1

Rotifer communities inhabiting wet sands of lake beaches are dependent in their functioning on permanent input of organic matter from neighbouring sites. The aim of the study is to test the hypothesis that trophic state of lake waters may influence densities and structure of psammon communities of Rotifera. Studies were carried out in hydro-, hygro- and euarenal of 44 beaches in 18 lakes of different trophy in summer 1999 (since 2 till 17 July) and 38 beaches in 16 lakes in spring 2000 (since 10 till 23 May). Psammon was sampled always between 10 a.m. and 2 p.m. at similar weather conditions (no shadow, rains and strong winds). Interstitial waters were mostly alkaline and contained less oxygen than lake ones and oxygen concentrations decreased upward water line. Very high variability of phosphate P content made differences between trophic groups of lakes not significant. Similarly, concentrations of P total were more or less similar in all studied trophic groups of lakes. Total nitrogen values were increasing from meso-eutrophic to hypertrophic lakes in spring, whereas this trend was not observed in summer. Chlorophyll a concentrations were similar in meso-, meso-eu- and eutrophic and markedly higher in hypertrophic lakes. In general, some tendency to increasing values of chemical parameters with increasing trophy may be seen if their ranking list is compared. Rotifers were present in all studied stations. In total, 110 species (i.e. ca. 26% of all records of rotifer species in Poland) were found with 22 species occurring exclusively in psammon. Three species new in rotifer fauna of Poland were discovered Cephalodella psammophila, Collotheca wiszniewski and Euchlanis dapidula. Generally all trophic groups of lakes were relatively similar as regards species structure of rotifer communities with rotifers of the genus Lecane playing most important role. The index of Percentage Similarity of Community calculated tbr randomly chosen 30 pairs of particular beaches from the same lake and for beaches of different lakes was in both cases almost identical. Species of high frequency constituted the overwhelming majority of individuals forming rotifer communities of all beaches. Taxons met in 1 to 5 lakes decided on faunistic originality of the communities. Some tendency was observed for higher diversity of psammon rotifer communities in mesotrophic and eutrophic lakes. The lowest values of diversity index occurred mostly in hypertrophic lakes. Psammobionts constituted only 20% and psammoxens 10% of the community abundance in all lakes and all zones of the beaches, whereas psammophilic rotifers decidedly dominated (70%). Rotifer abundance was relatively similar in eu- and hypertrophic lakes and markedly higher in mesotrophic and lower in meso-eutrophic lakes. However, due to high fluctuations of the values noted in particular beaches the differences were not significant in any of the possible configurations of compared data. Monogononta played much more important role in rotifer densities than bdelloids. The hypothesis on advantageous influence of high trophy of lake waters on abundance of psammon communities of Rotifera cannot be supported by results of this work. In lakes of moderate trophy (from meso- to eutrophy) the amount of nutrients and chlorophyll does not seem to influence psammon communities. In hypertrophic lakes this impact is observed, but it seems to be rather unfavourable for psammon rotifers. The communities in hypertrophic lakes are poorer in species, less diversified and less original. The group of animals developing well in this group of lakes are bdelloids. Species composition nad community structure of psammon rotifers seem to be rather determined by many different factors, lake trophy being only one of them and probably not the main one.

20

Limnological study on a lake formed in a limestone quarry [Krakow, Poland]. I. Water chemistry

72%

Galas J.

Polish Journal of Environmental Studies

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2003

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tom 12

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nr 3

Chemical investigation of water from a 21 ha lake with a maximum depth of 32 m formed in a former limestone quarry south of Kraków, Poland was carried out. The lake is meromictic, with maximum values of O₂ in mixolimnion, and water homothermy noted in December. The important influence of the polluted Vistula River, flowing only in 600m distance that mainly infiltrates the quarry, resulted in high chloride content and conductivity value. Low chlorophyll a concentration and TSISD value show that the lake is oligotrophic, whereas the nutrient concentrations indicate slightly higher trophy.

Ograniczanie wyników

Morphometric parameter for an estimation of a throphic status of lakes

Urea in lake ecosystem: the origin, concentration and distribution in relation to trophic state of The Great Mazurian Lakes (Poland)

New approach to trophic state assessment of running waters in Poland

Periphytic ciliates in littoral zone of three lakes of different trophic status

Summer phytoplankton composition in 26 lakes of Leczna-Wlodawa Lakeland

Chitinolytic bacteria in two lakes of different trophic status

Surface microlayer in lakes of different trophic status: dissolved organic matter and microbial community

Zoobenthos of ecotonal zones in several lakes of different trophic status [The Region Polesie Lubelskie, Eastern Poland]

Use of stable isotopes to delineate amphipod trophic status in Antarctic food webs

Factors determining trophic state of Lake Skrzynka and its biocoenotic structure (Wielkopolski National Park)