Wyniki wyszukiwania

1

Impact of periphyton communities and Daphnia magna Straus on selected water parameters

100%

Dabkowski P.

Zeszyty Naukowe. Acta Biologica. Uniwersytet Szczeciński

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2010

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tom 17

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Optimization of water management system operation while quality and quantity of water determined

100%

Polomska J., Chmielowski W.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2012

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tom 44

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nr 1

In this work the optimal operation of the water management system is analysed. The fundamental technical elements of the system are the water reservoirs and the network of the pipelines among the water reservoirs and between the water reservoirs and the water purification plants (WPPs). While the simulations of the optimal system operation, the vectors of the optimal flows are calculated, so that the total costs of the system operation determined by the quality factor F are minimal. The analytical solution for the dynamic optimization problem is the result of the application of the Pontryagin’s maximum principle. The simulation models of the optimal operation of the water management system were created in Matlab/Simulink. While the analyses of the results, the optimal control of some actual water management systems may by studied.

3

Parasite communities of Oreochromis niloticus baringoensis (Trewavas, 1983) in relation to selected water quality parameters in the springs of Lorwai Swamp and Lake Baringo, Kenya

84%

Adamba S. W. K., Otachi E. O., Ong'ondo G. O.

Acta Parasitologica

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2020

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tom 65

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nr 2

4

Assessment of water physico-chemical characteristics and statistical evaluation of Narmada Estuarine Region, Gujarat, India

84%

Nirmal Kumar I. J., Basil G., Nirmal Kumar R., Sajish P. R., Shailendra V.

Journal of Water and Land Development

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2012

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nr 16

5

Taxanomic composition of macroinvertebrates in the Liwiec River and its tributaries [cetral and eastern Poland] on the basis of chosen physical and chemical parameters of water and season

84%

Krolak E., Korycinska M.

Polish Journal of Environmental Studies

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2008

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tom 17

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nr 1

39-50

The taxonomic composition of macroinvertebrates in the Liwiec River and its tributaries situated in central and eastern Poland was studied during three seasons (spring, summer and autumn). Simultaneously, physical and chemical parameters of water were measured. Water parameters were different in each study period. Macroinvertebrates samples collected in summer and autumn were much more diversified than the samples collected in spring. In the spring samples a greater EPT diversity was observed, while in the samples collected in autumn Odonata, Coleoptera and Heteroptera were more diversified. The values of the BMWP-PL index were slightly higher for the summer and autumn samples than for the spring ones. Correlation between the concentration of oxygen in water and the number of individuals of Plecoptera and Trichoptera larvae was noted. The negative correlation between the values of BOD₅, the concentration of nitrate ions and conductivity, and the number of macroinvertebrate families was observed. A negative correlation also was noted between nitrate and phosphate ion concentrations and the number of individual insect larvae.

6

Long-term cyanobacterial dynamics as related to physicochemical water parameters in a restored urban lake

84%

Zebek E.

Journal of Elementology

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2016

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tom 21

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nr 1

The aim of this study has been to determine the response of cyanobacteria to the lake protection and restoration measures implemented in the littoral zone of an urban lake called Jeziorak Mały. The first investigations were conducted in 1996 and were resumed in 1997-2003, 2005 and 2013, following the installation of a separator and the creation of stone accumulation sites. Long-term changes in phytoplankton cyanobacterial proportions, abundance and biomass were analyzed in relation to environmental conditions at the sites in the littoral zone (S – separator pipes, K – sites with stones and R – sites with macrophytes). Relationships between cyanobacteria and water chemistry variables were analyzed by calculating the Spearman’s rank correlation coefficient, and then with canonical correspondence analysis (RDA). The results provided evidence that water temperature, total nitrogen and iron concentration (S, R), but also PO43- in spring (S,K) were the principal factors affecting cyanobacterial development. There was a significant decrease in the share, abundance and biomass of cyanobacteria coinciding with a decrease in conductivity and PO43- following the onset of lake restoration efforts. Changes in dominant species from the ones typical in hypertrophic lakes to those typically found in eutrophic lakes took place during the research. The modifications indicated a strong initial response of cynaobacteria to the restoration measures, but the situation stabilized in 2013, when cyanobacteria returned to their previous average levels. This suggests that the introduction of lake restortation measures contributed to the lake’s improved water quality and they should be retained for efficient lake management in the future.

7

The effects of physical-chemical water parameters on the Nymphaeion alliance development in northwestern Serbia

84%

Dzigurski D., Ljevnaic-Masic B., Nikolic L.

Acta Societatis Botanicorum Poloniae

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2014

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tom 83

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nr 2

Nymphaeion alliance vegetation is dominant floating-leaved vegetation in the Danube–Tisza–Danube hydrosystem in northwestern Serbia and comprises Nymphaeetum albae, Nymphaeetum albo-luteae, Nymphoidetum peltatae and Trapetum natantis associations. Comparative analysis of physical-chemical water parameters on localities where these – in most parts of Europe endangered and vulnerable stands – develop showed that most phytocenoses are associated with specific habitat conditions. Of the analyzed water properties, the factors that cause Nymphaeion alliance phytocenoses differentiation are primarily pH, alkalinity and COD-MnO4. Formation of the Nymphaeetum albae stands is significantly associated with the highest values of pH, COD-MnO4 and alkalinity, and the lowest nitrate, nitrite, dissolved and the total phosphorus content values, in comparison to the other studied associations. Nymphoidetum peltatae stands develop in waters characterized by the lowest pH and COD-MnO4, low alkalinity, and the highest nitrate and nitrite values in relation to the other analyzed phytocenoses. Trapetum natantis stands, on the other hand, prefer the warmer sections of the canal network, neutral pH, and the highest values of BOD5, dissolved and total phosphorus. Habitat conditions in which Nymphaeetum albo-luteae stands develop are of the widest range in comparison to other investigated phytocenoses.

8

Upwelling characteristics in the Puck Bay [the Baltic Sea]

84%

Nowacki J., Matciak M., Szymelfenig M., Kowalewski M.

Oceanological and Hydrobiological Studies

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2009

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tom 38

|

nr 2

3-16

9

Nature valuation of plant communities in the Zagorow polder including water content parameters

84%

Kryszak J., Kryszak A., Strychalska A., Przybyla C.

Steciana

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2014

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tom 18

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nr 2

Geobotanical studies conducted in spring in 2011–2012 in the Zagórów polder washland, covered by the ecological restoration programme, provided assessment of current nature value of plant communities and indicated potential directions of their further transformations as a result of changes in habitat water content levels. Based on the analyses of 77 relevés of 50–100 m2 each, prepared following the Braun-Blanquet method, water levels were assessed by phytoindication using moisture indicator values (F) according to Ellenberg et al. (1992). Moreover, nature value of vegetation was assessed based on the botanical structure, geo-historical spectrum, life form structure as well as the nature valuation index in the 10-point scale according to Oświt (2000). Based on relevés the area was valuated using the point score method according to Mahon & Miller (2003). An attempt was made to indicate potential directions of changes in vegetation, based on the determination of dependencies between certain parameters assessing its current condition and habitat conditions. Habitat water content connected with the supply of water through a network of culverts, geomorphology of the area and land use, affects the distribution of phytocenoses in the polder and their considerable diversity, which was confirmed by the identification of 19 plant communities from six phytosociological classes. Further maintenance of water relations and land use results in the transformation of plant communities: in the vicinity of culverts – towards the class Phragmitetea, in swamps and around small water bodies – towards communities of the classes Salicetea purpurea or Alnetea glutinosae, at longer distances from culverts in leveled and agriculturally utilised areas – towards the orders Trifolio fragiferae-Agrostietalia stoloniferae and Molinietalia, while in areas at valley margins the succession progresses towards communities of the class Nardo-Callunetea.

10

The effect of environmentally different lakes on the changes of physicochemical variables in the rivers of the Drawienski National Park

84%

Czerniawski R., Domagala J., Slugocki L., Pilecka-Rapacz M.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2014

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tom 11

11

Qualitative and quantitative changes of green algae with relation to physicochemical water parameters in the urban Lake Jeziorak Maly

84%

Zebek E.

Polish Journal of Natural Sciences

|

2009

|

tom 24

|

nr 1

60-75

Phytoplankton in the littoral and pelagial zone of the urban Lake Jeziorak Mały were studied between April and October of 2002, 2003 and 2005. The relation between the abundance and biomass of green algae and selected physiochemical water parameters, species diversity and dominants in the total abundance and biomass of green algae were analyzed. The statistically significant relationships was noted between water temperature, oxygen content, total nitrogen and the biomass of green algae at the coefficient of multiple correlation R = 0.4722. Increased the abundance and biomass of green algae were followed by a decrease in water temperature and increase in oxygen content and total nitrogen concentration during their growth in a temperature range of 10.0℃ to 18.8℃. The maximum biomass of green algae was noted in September and the maximum their abundance in October at the highest total nitrogen concentration. In the case of abundance, dominated taxa typical of plankton (Micratinium pusillum, Chlamydomonas spp., Golenkinia radiata, Golenkiniopsis sp., Koliella variabilis and Monoraphidium concortum) and biomass one – filamentous forms as a component of plant periphyton (Spirogyra sp., Stigeoclonium sp. and Ulothrix tenuissima).

12

Fern Azolla filiculoides at new sites in Oder River (Poland) – invader or ephemeral?

84%

Mysliwy M., Szlauer-Lukaszewska A.

Polish Journal of Ecology

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2017

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tom 65

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nr 4

Azolla filiculoides Lam. is the second most widely distributed alien aquatic plant in Europe. A native of America, it has become — on account of human mediation — a cosmopolitan species. In Poland, it has been known so far from a few stands in ponds and old river beds. In 2016, it was recorded at six new sites in-between the groynes at the main Oder river bed between Maszewko near Krosno Odrzańskie (52°3′10.69″N, 14°57′13.56″E) and Owczary (52°28′53.59″N, 14°37′30.43″E). The assemblages containing the fern were identified as representing the association Ceratophyllo-Azolletum filiculoidis Nedelcu 1967. Azolla has also entered the phytocoenoses of other floating plant communities. Mean values of several chemical parameters of the water like conductivity, salinity, total dissolved solids and nitrate content at the fern stations were significantly higher than the mean values found in the Azolla-devoid sites while the values for hardness (Ca), pH and visibility (Secchi Disc depth) were lower at Azolla sites. In 2017, this alien fern was found to had successfully overwintered in the main bed of Oder river, and its further spread down the river was observed. The appearance of Azolla filiculoides in the Oder may be associated with an exceptionally warm winter; its emergence may also accelerate the species' invasion in Poland.

13

Geochemical and acoustic evidence for the occurrence of methane in sediments of the Polish sector of the Southern Baltic Sea

84%

Brodecka A., Majewski P., Bolalek J., Klusek Z.

Oceanologia

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2013

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tom 55

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nr 4

14

Changes of species diversity of phytoplankton and physicochemical water parameters in annual cycles in the urban Lake Jeziorak Maly

84%

Zebek E.

Oceanological and Hydrobiological Studies

|

2007

|

tom 36

|

nr Suppl.1

15

Annual succession patterns of blue-green algae as related to physicochemical water parameters in the urban Lake Jeziorak Maly in the 1998-2003 period

84%

Zebek E.

Oceanological and Hydrobiological Studies

|

2005

|

tom 34

|

nr 4

16

Waves, currents and sea level variations along the Letipea - Sillamäe coastal section of the Southern Gulf of Finland

67%

Suursaar U.

Oceanologia

|

2010

|

tom 52

|

nr 3

391-416

Variations in the hydrodynamic conditions were studied on the basis of 336 days of measurements with a Doppler current profiler. With wave data as a calibration reference, a semi-empirical hindcast of wave parameters is presented in the fetch- limited near-shore area for the period 1966–2008. A resultant 4–6 cm s−1 westward current dominated along the coast. Occasional fast sub-surface westward currents under modest wind forcing, as well as asymmetrical vertical profiles for westward and eastward currents indicated the influence of upwelling-related baroclinic coastal jets. The average frequency of upwelling was estimated at 17%; some of the events were identified in near-homothermic winter conditions on the basis of salinity and multi-layer flow records. While the mean sea level trend at Narva-Jõesuu roughly approximated the global estimates for 1899–2009, the annual maximum sea level increase was 5–8 mm yr−1. Both mean and maximum wave heights declined as a result of decreasing winds from the north.

17

Mites (Acari) of the shores of forest lakes and ponds in northern Poland, with species analysis of Oribatida

67%

Seniczak A.

Rozprawy. Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy

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2011

|

nr 150

18

Qualitative and quantitative changes of diatoms with relation to physiochemical water parameters in the littoral zone of the urban Lake Jeziorak Maly

67%

Zebek E.

Oceanological and Hydrobiological Studies

|

2007

|

tom 36

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nr 4

3-22

19

Effects of diversified pond carp culture. 3. Chemical composition of the water in ponds with different carp production

67%

Kolasa-Jaminska B.

Acta Hydrobiologica

|

1995

|

tom 37

|

nr Suppl.1

20

Qualitative and quantitative changes of blue-green algae in response to physicochemical water parameters in the urban Lake Jeziorak Maly

67%

Zebek E.

Oceanological and Hydrobiological Studies

|

2005

|

tom 34

|

nr 1

Ograniczanie wyników

Impact of periphyton communities and Daphnia magna Straus on selected water parameters

Optimization of water management system operation while quality and quantity of water determined

Parasite communities of Oreochromis niloticus baringoensis (Trewavas, 1983) in relation to selected water quality parameters in the springs of Lorwai Swamp and Lake Baringo, Kenya

Assessment of water physico-chemical characteristics and statistical evaluation of Narmada Estuarine Region, Gujarat, India

Taxanomic composition of macroinvertebrates in the Liwiec River and its tributaries [cetral and eastern Poland] on the basis of chosen physical and chemical parameters of water and season

Long-term cyanobacterial dynamics as related to physicochemical water parameters in a restored urban lake

The effects of physical-chemical water parameters on the Nymphaeion alliance development in northwestern Serbia

Upwelling characteristics in the Puck Bay [the Baltic Sea]

Nature valuation of plant communities in the Zagorow polder including water content parameters

The effect of environmentally different lakes on the changes of physicochemical variables in the rivers of the Drawienski National Park

Qualitative and quantitative changes of green algae with relation to physicochemical water parameters in the urban Lake Jeziorak Maly

Fern Azolla filiculoides at new sites in Oder River (Poland) – invader or ephemeral?

Geochemical and acoustic evidence for the occurrence of methane in sediments of the Polish sector of the Southern Baltic Sea

Changes of species diversity of phytoplankton and physicochemical water parameters in annual cycles in the urban Lake Jeziorak Maly

Annual succession patterns of blue-green algae as related to physicochemical water parameters in the urban Lake Jeziorak Maly in the 1998-2003 period

Waves, currents and sea level variations along the Letipea - Sillamäe coastal section of the Southern Gulf of Finland

Mites (Acari) of the shores of forest lakes and ponds in northern Poland, with species analysis of Oribatida

Qualitative and quantitative changes of diatoms with relation to physiochemical water parameters in the littoral zone of the urban Lake Jeziorak Maly

Effects of diversified pond carp culture. 3. Chemical composition of the water in ponds with different carp production

Qualitative and quantitative changes of blue-green algae in response to physicochemical water parameters in the urban Lake Jeziorak Maly