Wyniki wyszukiwania - Biblioteka Nauki

1

The chemistry of water and bottom sediments in relation to zooplankton biocenosis in small agricultural ponds

100%

Joniak T. , Kuczyńska-Kippen N.

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tom Vol. 39, No.2

85-96

EN

This study analyzed the chemistry and structure of planktonic fauna communities in small water bodies located within agricultural areas of different levels of anthropogenic transformation in the Wielkopolska region. Distance from farm buildings was a decisive factor when choosing the bodies of water for this study. A distinctive feature of the chemical characteristics of the examined water bodies was a high concentration of biogenic substances. The presence of biologically available mineral elements stimulated the development of algae, which was reflected in high concentrations of chlorophyll. High trophic conditions in the waters of the investigated ponds were also confirmed when analyzing the zooplankton community structure.

2

Zależność odczynu wody opadowej pH od wysokości opadów atmosferycznych na stacji Ursynów-SGGW w latach 1998-2003

100%

Błędzińska A.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2004

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tom Vol. 13, No. 1

133--139

EN

The research was realized in the period from April 1998 to October 2003. Research showed different characteristics of reiationship between amount precipitation and reaction of precipitation for acid reaction and alkaline reaction. Degree of pH is positively related with amount precipitation in case of alkaline reaction and negatively related in case of acid reaction. Highest degree of correlation r between pH and height of precipitation is 0,64 (precipitation inside air mass of alkaline reaction in summer half-year periods) and 0,62 (precipitation frontal of alkaline reaction in winter half-year periods).

3

Relationships among ciliated protozoa and water chemistry in small peat-bog reservoirs (Łęczna-Włodawa Lakeland, Eastern Poland)

100%

Mieczan T.

Oceanological and Hydrobiological Studies

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2007

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tom Vol. 36, No.2

77-86

EN

The aims of this study were to identify the taxonomic and trophic diversity of planktonic ciliate communities occurring in small peat-bog reservoirs of various acidities (from about 3 to 6), and to assess the effects of chemical factors on them. Generally the highest numbers of ciliate taxa were recorded in high pH (>6) reservoirs, and the lowest in low pH (3.28-4.6) reservoirs. The mean numbers of planktonic ciliates in the high pH reservoirs were about three times higher than in the low pH reservoirs. However, the greatest biomass of ciliates occurred in low pH reservoirs. The results suggest that pH, conductivity and total organic carbon (TOC) are more important than total phosphorus (Ptot) in the distribution of planktonic ciliates in peat-bog reservoirs. In the low pH peat-bog reservoirs, the biggest factor affecting ciliate distribution is the pH of the water, whilst in the higher pH reservoirs the role of organic matter becomes increasingly important with increasing pH.

4

Influences of process water chemistry on reverse flotation selectivity of iron oxides

100%

Tang M. , Wang D. , Wu Y. , Liu D.

Physicochemical Problems of Mineral Processing

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2022

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tom Vol. 58, iss. 6

art. no. 151839

EN

It is critical for water quality in flotation as it dramatically influences the chemical/electrochemical properties of mineral surfaces and their interactions with reagents. Many potential variations could alter the water chemistry: water recirculation, mineral dissolutions, reagent additions, etc. This study aimed to identify the key elements from the recycled water sources affecting the separation efficiency in a typical industrial flotation circuit of iron oxides through a series of bench/micro flotation tests, zeta potential measurement, etc. The built-up and distribution of the dominant cations/anions in the process water from the roughers in the flotation system was also analyzed and recorded by Inductively Coupled Plasma-Optical Emission (ICP-OES) for a period of about three months when the operations were stable. The flotation results pointed out that a concentrate with a sharp increase of 6.0% Fe recovery and 2.5% SiO2 content was obtained by using the recycled tailing water only in comparison by using fresh water. In contrast, a slight uptrend in the grade of Fe but a substantial loss of near 6.5% Fe recovery occurs by using the treated sewage water alone instead. This could attribute to the ion distributions in these water sources, in which Ca2+, Fen+, Mg2+ or SO42ions were determined as the key ions influencing the flotation behaviors of the iron ore. But the competitive effects of Fe3+ ions were more significant than the ones of Ca2+ or Mg2+ ions. And the occurrence of starch could deteriorate the dilution of silicates in concentration induced by Fe3+/Fe2+ ions. It can be explained by zeta potential measurement or solution chemistry of those ions, indicating that at 8.5-9.0, the coating of the precipitates of Fe(OH)3(s) induced by iron ions alters a reverse on the zeta potentials of quartz. The presence of SO42-ions, however, has a positive role in reducing the possibility of slime coating on silicates due to acting as a chelating agent of iron ions.

5

Diversity and vertical distribution of planktonic ciliates in a stratified mesotrophic lake: relationship to environmental conditions

100%

Mieczan T.

Oceanological and Hydrobiological Studies

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2008

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tom Vol. 37, No.1

83-95

EN

The density and biomass of planktonic ciliates significantly differed between sample sites in a deep, mesotrophic lake, with the lowest numbers in the hypolimnion and the highest in the epilimnion. The community composition varied greatly with depth. Oligotrichs dominated in the epilimnion, where prostomatids and peritrichs were also important components of the community. The density of oligotrichs and peritrichs decreased in the metalimnion, and they were absent from the hypolimnion. In the deep metalimnion the most abundant groups were prostomatids, haptorids and scuticociliates. In the hypolimnion, the ciliate community was dominated by scuticociliates and heterotrichs. In the epilimnion and metalimnion a significant positive correlation was observed between ciliate numbers, chlorophyll a and heterotrophic flagellate density. In all three zones the number of ciliates was most strongly correlated with water temperature, concentrations of total organic carbon (TOC), total phosphorus (Ptot) and bacterial density, whilst in the hypolimnion there was a significant correlation between ciliate numbers and the dissolved oxygen concentration.

6

Notes on the Paramecium aurelia species complex in the Region of the Orawa Valley

100%

Przybos E. , Komala Z.

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1996

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tom 44

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nr 1-2

7

A comparison of various indices based on benthic macrofauna for the assessment of the ecological status of selected Carpathian streams

88%

Galas J. , Dumnicka E. , Galus-Barchan A.

Oceanological and Hydrobiological Studies

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2014

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tom Vol. 43, No. 2

123--130

EN

The biological indices MMI-PL, BMWP-PL, and %EPT were applied to compare the ecological status of Carpathian flysch stream sectors situated above and below sewage treatment plants. MMI-PL was found to be the most sensitive, whereas BMWP-PL indicated a very good ecological status at all sampling stations despite an increased trophic level of water in polluted sectors. %EPT proved to be an unreliable index because of its strong fluctuations resulting mainly from unstable densities of benthic invertebrate groups not included therein. The analyses of coli titers and water chemistry in the same stream sectors revealed temporary pollution at both types of stations.

8

Impact of waterbirds on chemical and biological features of water and sediments of a large, shallow dam reservoir

88%

Gwiazda R. , Woźnica A. , Łozowski B. , Kostecki M. , Flis A.

Oceanological and Hydrobiological Studies

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2014

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tom Vol. 43, No. 4

418--426

EN

Large numbers of Mallard Anas platyrhynchos (max. 10,490 ind.), Black-headed Gull Chroicocephalus ridibundus (max. 3,430 ind.) and Great Cormorant Phalacrocorax carbo (max. 1,449 ind.) were recorded on the Goczałkowice Reservoir, Poland (2,754 ha). Most of the waterbirds occurred in the backwater of this reservoir. The amount of phosphorus and nitrogen loaded by the most numerous waterbirds into Goczałkowice Reservoir was estimated at 958 kg and 2,621 kg, respectively in 2011 and 1,043 kg and 2,793 kg, respectively in 2012. In 2011 and 2012, the waterbirds introduced a considerable amount of phosphorus, nitrogen and a large number of coliforms into the backwater of the reservoir. The concentration of different forms of phosphorus and nitrogen, chlorophyll-a and bacteria coli in the water was not greater at the site of birds’ concentration (except dissolved organic nitrogen). The concentration of nitrates in the water at the site near the breeding colony of gulls in comparison with the reference site was not different. The amounts of P-tot and N-tot in the sediment were similar at the site affected by waterbirds and at the reference site. The dynamics of water masses was not the reason for the lack of differences between the studied sites.

9

Buffering of pulp pH and its influence on process water chemistry during iron ore flotation

88%

Tang M. , Xiao Q.

Physicochemical Problems of Mineral Processing

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2021

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tom Vol. 57, iss. 4

157--167

EN

It is inevitable for the occurrences of pulp pH buffering during pH control in flotation as the minerals with acidic/alkali properties tend to interact with pH modifiers and restore the pulp pH. This could result in some disturbing ions and alter the water/pulp chemistry. The purpose of this study was to identify the influences of pulp pH buffering on process water chemistry through a series of pH buffering tests, bench flotation experiments, ore dissolution tests, zeta potential measurement, and Xray diffraction (XRD) analysis. The built-up and distribution of the dominant cations in the process water from different locations in an industrial flotation system of the iron ore were analyzed and recorded by Inductively Coupled Plasma-Optical Emission (ICP-OES) at a period of about six months when the operations were stable. The data showed that a near five-minute buffer of pulp pH at a range from near 7.9 to 8.9 occurred before it reached a stable value. At this period, the dissolution of Ca/Mg from the iron ore was dominant. And, the pulp pH at a lower value tended to induce more dissolved Ca2+ and Mg2+ ions. These divalent cations seem to have different influences on the flotation properties of iron oxides at the same concentrations, indicating a positive effect on the recovery of iron oxides with the presence of Mg2+ ions but an opposite effect if Ca2+ ions occurred. The presence of sulfate, however, tended to restore the floatability of silicate depressed by Ca2+ ions.

10

Dystrophy or eutrophy: phytoplankton and physicochemical parameters in the functioning of humic lakes

88%

Poniewozik M. , Wojciechowska W. , Solis M.

Oceanological and Hydrobiological Studies

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2011

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tom Vol. 40, No.2

22-29

EN

The studies were carried out in six humic lakes (Polesie Region, Eastern Poland) in order to present a role of phytoplankton in relation to physical and chemical parameters characteristic of particular processes. On the basis of physical and chemical properties of waters (SD, colour, pH, EC, Ca2+, DIC, DOC), these lakes are divided into three groups: dystrophic (Lakes Orchowe and Płotycze), humoeutrophic (Lakes Brudzieniec and Pereszpa) and mesoeutrophic (Lakes Moszne and Długie). The occurrence of dystrophication, humoeutrophication or eutrophication processes is clearly reflected in the phytoplankton composition and its abundance, as well as its biomass. In both dystrophic and humoeutrophic lakes, flagellates dominated in the phytoplankton. Among them, the invasive species Gonyostomum semen was very abundant. Mesoeutrophic lakes were characterized by other phytoplankton composition, mainly by non-flagellate species (green algae).

11

Changes in the quality of the water of Lake Wicko Male [Szczecin Lagoon] over the years 1991-1997

88%

Poleszczuk G. , Sitek S.

Bulletin of the Sea Fisheries Institute

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1997

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nr 3

12

Zoosporic fungi growing on gymnosperm pollen in water of varied trophic state

88%

Czeczuga B. , Muszynska E.

Polish Journal of Environmental Studies

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2001

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tom 10

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nr 2

EN

The authors investigated zoosporic fungi developing on the pollen grains of 36 taxons of gymnosperm plants in three bodies of water of various trophic state. A total of 83 zoosporic fungus species were noted, with predominance by the Peronosporales (39) and Chytridiales species (29). Twelve fungus species were recorded for the first time in Polish waters.

13

Formation of phytoplankton in the first years of existence of the water supplying reservoir (Southern Poland) against the background of increased eutrophication process

75%

Pająk G.

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tom Vol. 32, No. 4

5-77

EN

The aim of the investigations was a recognition of the complex of physico-chemical parameters affecting the dynamics and structure of phytoplankton. The taxonomical composition, abundance and biomass of nano- and phytoplankton has been determined. In the development of the reservoir four stages were distinguished. In stage I of the reservoir filling, the temperature and pH value of water as well as the level of PO4-P, had a decisive influence on the process of phytoplankton formation. A sudden change in the damming ordinate in stage II of the reservoir studies contributed to the development of nanoplanktonic diatoms, and the refilling of the reservoir ( stage III) caused an abundant development of green algae. After the reservoir had been filled (stage IV) the planktonic forms of cryptophytes group dominated. The initial dominance of taxons had no influence on its structure after a four-year searching. A very similar pattern of proportionally altering phytoplankton communities in the investigated basins (BM and BD) suggests that both the depth and availability of nutrient compounds were not the limiting factors in the initial period of functioning of the Dobczyce Reservoir.

14

Sezonowa zmienność chemizmu wody w małej rzece w zlewni zurbanizowanej

75%

Wysocka-Czubaszek A. , Wojno W.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2014

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tom Vol. 23, No. 1

64--76

PL

Celem niniejszej pracy była ocena sezonowej zmienności składu chemicznego wód rzeki Białej przepływającej przez obszar zurbanizowany. Rzeka Biała nie jest silnie zanieczyszczona. Średnia wartość EC25 wyniosła od 450 μS·cm–1 w górnym biegu rzeki do 838 μS·cm–1 w jej dolnym biegu. Stężenie N-NO3 - było najwyższe w większości punktów w maju i lipcu 2009 roku oraz w marcu 2010 roku. Stężenie N-NH4 + wahało się od 0,07 do 1,34 mg·dm–3. Najwyższe stężenia azotu amonowego stwierdzono w listopadzie 2009 roku i w marcu 2010 roku, w okresach małej aktywności biologicznej. Stężenie fosforanów zazwyczaj było podobne w wodach na całej długości badanego odcinka rzeki, a najmniejsze jego wartości odnotowano w listopadzie 2009 roku. Stężenie chlorków wynosiło 16,3–56,0 mg·dm–3. Najwyższe stężenie jonów Cl– , związane z zimowym utrzymaniem dróg, stwierdzono w marcu 2010 roku.

EN

The aim of this study was to assess the seasonal variability of the chemical composition in the Biała River flowing through the urban area. The Biała River is not heavily polluted. Average EC25 ranged from 450 μS·cm–1 in the upper course of the river to 838 μS·cm–1 in its lower course. The highest nitrate concentration was found in most sampling points in May and July 2009 and in March 2010. Ammonium concentration ranged from 0.07 to 1.34 mg·dm–3. The highest N-NH4 + was found in November 2009 and in March 2010, in the periods of the lowest biological activity. The concentration of phosphates was similar in the water on the studied section of river. The lowest PO4 3– concentration was measured in November 2009. Chloride concentration ranged from 16.3 to 56.0 mg·dm–3. The highest Cl– concentration in March 2010 is the result of winter road maintenance.

15

Age and land use as factors differentiating hydrochemistry and plant cover of astatic ponds in post-agricultural landscape

75%

Mętrak M. , Pawlikowski P. , Suska-Malawska M.

Journal of Water and Land Development

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2014

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tom no. 21

29--37

EN

Small, astatic ponds are important features of post-glacial landscape, which support heterogeneity and biodiversity of agricultural areas. In the presented research we explored differences in hydrochemistry and plant cover of 20 small ponds located in Northeastern Poland, characterized by diverse age and developed in differently managed areas. According to our research, though changes in water level are under direct influence of water balance in the catchment, to which belonged the ponds, their hydrochemistry seemed to be shaped by processes at the level lower than the catchment scale. Age of the ponds appeared to be an important factor influencing density and species composition of vegetation developed on the studied ponds.

PL

Badania prowadzono przez dwa lata na małych zbiornikach wodnych w krajobrazie porolnym w Mazurskim Parku Krajobrazowym. Wybrano 20 zbiorników podzielonych na trzy grupy różniące się wiekiem, stopniem odizolowania i sposobem zagospodarowania otaczających je terenów. Regularnie monitorowano właściwości chemiczne wody w zbiornikach. W celu oszacowania różnic w pokrywie roślinnej zbiorników wykonano zdjęcia fitosocjologiczne metodą Brauna-Blanqueta. Wykazano, że nowopowstałe zbiorniki istotnie statystycznie różnią się od starych poziomem wody, jej odczynem i zawartością jonów wapnia. Najwyższy poziom wody zarejestrowano w starych zbiornikach położonych w otoczeniu półnaturalnych wilgotnych łąk, największą wartość pH i największe stężenie jonów wapnia – w nowopowstałych zbiornikach. We wszystkich badanych grupach zbiorników poziom wody i wartości badanych parametrów chemicznych podlegały zmienności sezonowej. Roczna dynamika właściwości chemicznych wody nie wykazywała związku z fluktuacjami poziomu wody. Parametry chemiczne wody w starych zbiornikach położonych wśród pól uprawnych nie różniły się od notowanych w starych zbiornikach położonych na obszarze łąk półnaturalnych. Na nowopowstałych zbiornikach dominowały zbiorowiska charakterystyczne dla otwartej toni wodnej. Brzegi młodych zbiorników charakteryzowały się znacznym udziałem błotnistych, luźno pokrytych roślinnością powierzchni. Różnorodność flory młodych zbiorników, wyrażona liczbą gatunków oraz współczynnikiem Shannona- Weavera, była istotnie mniejsza niż w starych zbiornikach. Zbiorniki stare na półnaturalnych łąkach cechował duży udział gatunków charakterystycznych dla rzędu Molinietalia caeruleae W. Koch 1926 oraz dla związku Magnocaricion Koch 1926. W grupie tych zbiorników zarejestrowano największe wartości wskaźników różnorodności biologicznej. Na starych zbiornikach otoczonych polami uprawnymi dominowały pałkowiska Typha latifolia. Zaobserwowano także liczne gatunki charakterystyczne dla siedlisk przekształconych przez człowieka (gatunki ruderalne, chwasty).

16

Zmiany składu chemicznego wód podziemnych na obszarze Żuław Wielkich w ujęciu historycznym i współcześnie

75%

Pruszkowska-Caceres M. , Puskarz A. , Grabowski S. , Wolańska A.

Gospodarka Wodna

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2024

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tom Nr 4

28--31

PL

Badania hydrogeologiczne Żuław Wielkich koncentrują się na zasoleniu wód podziemnych. Od początku XX wieku do chwili obecnej obserwuje się wysokie stężenia chlorków, jonów amonowych i mineralizacji we wszystkich poziomach wodonośnych. Uznaje się, iż na przeważającym obszarze nie występują tu warstwy wodonośne o znaczeniu użytkowym, a zasoby wód podziemnych Żuław Wielkich są ograniczone. Przeprowadzone badania pozwoliły na ustalenie genezy występujących problemów z jakością wód podziemnych i powiązanie ich z warunkami hydrogeologicznymi regionu.

EN

The hydro-geological research in the Żuławy Wielkie region is focused on the groundwater salinity. Since the beginning of the 20th century, we have been observing high concentration of chlorides, ammonium ions and mineralisation in all water-bearing strata. It is considered that in the major part of this area there are no functional water-bearing strata and groundwater resources of Żuławy Wielkie are limited. The performed research allowed for determination of the origin of the existing issues related to the groundwater quality, linking them to the hydro-geological conditions of the region.

17

Impact of deforestation on water chemistry in the western Tatras and Beskid Slaski range in the Polish Carpathians

75%

Kosmowska A. , Zelazny M. , Malek S. , Stanczyk T.

Acta Scientiarum Polonorum. Formatio Circumiectus

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2018

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tom 17

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nr 3

EN

The article describes the research into the impact of deforestation on the values of physicochemical traits and chemical composition of waters which drain the catchments covered with forest, and those that have been deforested, in the western part of Polish Carpathians. The research was carried out in independent catchments in the Skrzyczne massif in the Beski Śląski (Silesian Beskidy Range) in 2013–2014, and in the Kościeliska Valley in the Western Tatras in 2015–2016. During field studies, water samples were collected monthly in catchments with various degrees of deforestation, and the physicochemical characteristics of water were measured (pH, PEW, Tw). In the laboratory, the chemical composition of water, specifically the content of 14 ions (Ca²⁺, Mg²⁺, Na⁺, K⁺, NH₄⁺, Li⁺, HCO₃⁻ , SO₄²⁻, Cl⁻, NO2 ⁻, NO₃⁻ , PO₄³⁻ , Br⁻, F⁻), was determined by means of ion chromatography (DIONEX 2000). The conducted research has shown the impact of deforestation on the value of physical and chemical traits and chemical composition of water. Deforestation of the slopes caused changes in the structure of the chemical composition of water, especially in the area of correlations between anions. In the Tatras, in the basins deforested as a result of windfall, a significant increase in the proportion of NO₃⁻ (% mval ∙ dm⁻³) in the anionic element of the chemical composition of water was observed, and in the Beskid Śląski, in catchments deforested due to the tree stand decay associated with the imission of pollutants, a significant increase in SO₄²⁻ (% mval ∙ dm⁻³) and a significant decrease in HCO₃⁻ (% mval ∙ dm⁻³) in the anionic structure of the chemical composition of waters was observed. These examples document the extremely important role played by forests, which cover mountain slopes, in the hydrochemical functioning of the catchment. In the spatial aspect, there is an unusual phenomenon of hydrochemical mosaicism consisting in the occurrence of different relationships between anions, especially hydrogen carbonates, sulphates and nitrates.

PL

W artykule opisano badania wpływu wylesień na wartości cech fizyczno–chemicznych i skład chemiczny wód odwadniających zlewnie pokryte lasem i wylesione w zachodnich Karpatach Polskich. Badania przeprowadzono w niezależnych zlewniach w masywie Skrzycznego w Beskidzie Śląskim w latach 2013–2014 i w Dolinie Kościeliskiej w Tatrach Zachodnich w latach 2015–2016. W terenie pobierano co miesiąc próbki wody w zlewniach o różnym stopniu wylesienia oraz mierzono cechy fizyczno-chemiczne wody (pH, PEW, Tw). W laboratorium metodą chromatografii jonowej (DIONEX 2000) oznaczono skład chemiczny wód w zakresie 14 jonów (Ca²⁺, Mg²⁺, Na⁺, K⁺, NH₄⁺, Li⁺, HCO₃⁻ , SO₄²⁻, Cl⁻, NO2 ⁻, NO₃⁻ , PO₄³⁻ , Br⁻, F⁻). Przeprowadzone badania wykazały wpływ wylesień na wartości cech fizyczno-chemicznych i skład chemiczny wód. Wylesienie stoków spowodowało zmiany w strukturze składu chemicznego wód szczególnie w zakresie relacji między anionami. W Tatrach, w zlewniach wylesionych wskutek wiatrołomu zaobserwowano zgodnie z oczekiwaniem znaczny wzrost udziału NO₃⁻ (% mval ∙ dm⁻³) w członie anionowym składu chemicznego wody, a w Beskidzie Śląskim w wylesionych zlewniach wskutek rozpadu drzewostanu związanego z imisją zanieczyszczeń zaobserwowano znaczny wzrost udziału SO₄²⁻ (% mval ∙ dm-3) i znaczny spadek HCO₃⁻ (% mval ∙ dm⁻³) w anionowym członie struktury składu chemicznego wód. Te przykłady dokumentują niezwykle ważną rolę, jaką odgrywają lasy pokrywające stoki górskie w hydrochemicznym funkcjonowaniu zlewni. W aspekcie przestrzennym występuje nietypowe zjawisko mozaikowości hydrochemicznej, polegające na występowaniu różnych relacji między anionami, szczególnie wodorowęglanami, siarczanami i azotanami.

18

Quality assessment of spring water from the area of the Lysogory Mts. in Swietokrzyski National Park in 2010

75%

Jasik M. , Malek S.

Folia Forestalia Polonica. Series A . Forestry

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2013

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tom 55

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nr 1

EN

The study was conducted in the year 2010 in the Łysogóry Mts. in Świętokrzyski National Park. Spring water samples were collected in three rounds. The first round was carried out after the period of snowmelt (March/ April 2010), the second – after intensive rainfall (May 2010) and the third – when water levels were low (July 2010). The data set attained concerned conductivity, water pH, and also concentrations of the foremost anions (Cl-, NO3 -, SO4 2-) and cations (NH4 +, Na+, K+, Ca2+, Mg2+). Spring water quality was assessed in line with Polish policy on groundwater (Regulation of the Minister of Environment of 23 July 2008, The results confirmed that spring water quality strongly depended on wet acid deposition and the geological structure. Tree species (fir and beech), exposition and soil types within the alimentation area did not influence water chemistry. Spring water were found in low quality classes according to Polish standards due to low water pH as well as high NO3 - and NH4 + concentration.

19

Effect of deforestation on water chemistry in the Kościeliska Valley in the Western Tatras in southern Poland

75%

Zelazny M. , Kosmowska A. , Stanczyk T. , Mickiewicz M.

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

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2017

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tom 49

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nr 3

20

Long-term changes in aquatic and swamp vegetation in selected lakes of Sejny Lake District

75%

Klosowski S. , Tomaszewicz G. H. , Tomaszewicz H.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

|

2004

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tom 01