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The Tatra lakes comprise approximately 200 bodies of water, excluding smaller and seasonal lakes, located within the Tatra Mountains. Of these, around 40 lakes are situated in the Polish Tatras, while the remainder are found on the Slovak side of the range. They are known for their clear waters and scenic surroundings, making them popular destinations for outdoor activities such as hiking and photography.[1]
In local vernacular, these lakes are traditionally referred to as "ponds", a term that is also reflected in various forms of literature, including scientific studies. The Tatra lakes play an important ecological role, supporting a range of flora and fauna, some of which are unique to the region. They contribute significantly to the natural heritage of the Tatra Mountains, attracting visitors interested in both recreation and nature conservation.[1]
large submontane reservoirs (up to 1,400 meters above sea level) with surfaces free of ice for at least 6 months a year, characterized by low transparency;
shallow ponds and marshes (from 1,400 to 1,450 meters above sea level) characterized by significant temperature fluctuations in summer (from 4°C to 22°C);
shallow ponds at between 1,450 and 1,700 meters above sea level with considerable temperature fluctuations in summer (from 4°C to 17°C);
deep lakes at between 1,500 and 1,800 meters above sea level whose surfaces are ice-free for 3 to 5 months, with summer temperatures of between 8°C and 14°C;
shallow lakes at between 1,700 and 1,900 meters above sea level with summer temperatures of between 8°C and 14°C;
high altitude cold lakes (from 1,800 to 2,000 meters above sea level) whose surfaces are ice-free for less than 3 months, with summer temperatures below 8°C;
frozen lakes located at between 2,050 and 2,180 meters above sea level, with summer temperatures not exceeding 5°C, and surfaces rarely free of ice; in some years, they remain covered with ice all year round.
Characteristics
Tatra lakes are surface-fed by rain and meltwater, streams, and underground springs.[3] The water levels in the ponds are generally stable, with the surface level fluctuating by only a few dozen centimeters. The highest levels occur during spring thaws, while the lowest levels are observed in autumn and winter. Water levels also rise after heavy rainfall, typically with a one-day delay.[1] Some ponds give rise to streams, such as Czarny Potok Gąsienicowy[pl], which flows out of Czarny Staw Gąsienicowy[pl], and Žabí potok[pl], which originates from Malé Žabie pleso Mengusovské[pl]. Some ponds, like Siwe Stawki[pl] or Dolné Bystré pleso[pl], are seasonal and often dry up during the summer months.[1]
Most of the Tatra lakes are characterized by very high transparency. The highest transparency (measured by the visibility of a submerged white disk) is found in high-altitude tarns. Record transparency has been recorded in Veľké Hincovo pleso (19 meters), in Czarny Staw pod Rysami (from 16.5 to 17.5 meters), and in Morskie Oko (12 meters). Such high transparency is related to the very low organic life in these lakes, the absence of plankton, and the minimal presence of suspended particles.[2] The littoral zone is either absent or poorly developed. The bottom sediments are highly mineralized and low in organic compounds, particularly nitrogen compounds. This is also one of the reasons for the low abundance of plankton in these lakes. The water in these lakes is cold and highly oxygenated, and they are classified as extremely oligotrophic.[2] Lower-altitude moraine ponds, like Smreczyński Staw and Toporowe Stawy, which have richer organic life, are much less transparent (around 2 meters). High-altitude, deep, and nutrient-poor Tatra lakes, when viewed from a distance, appear sapphire blue. Slightly lower lakes, such as Morskie Oko, appear blue with an emerald hue, while Smreczyński Staw has a brownish color. However, these colors are observed only in the shallower water layers; in deep lakes, the water appears black due to the absorption and scattering of light, which prevents it from penetrating to great depths. When observing a lake from above, different shades can be seen depending on the depth of the bottom.[2]Czerwony Staw Pańszczycki[pl] owes its color to the cyanobacteriaPleurocapsa aurantica, which stains the stones on the lakebed a reddish-brown color.[2]
Temperature measurements in the ponds show the existence of distinct water layers with a sharp temperature drop, known as a thermocline.[2] The living conditions for aquatic organisms significantly depend on their location relative to the thermocline. The formation of a thermocline is related to the great depth of the lakes and the high mountain walls, which provide protection from the wind that stirs up waves.[2] A measurement conducted on 2 August 1937 at Morskie Oko revealed that the well-mixed upper water layer, stirred by waves, was only 3 meters thick with a temperature of 12.1°C. From the surface to a depth of 10 meters, the temperature dropped by almost 1°C per meter; between 10 and 20 meters, it decreased much more slowly (around 0.25°C per meter). Below 20 meters, all the way to the bottom, the temperature remained constant at around 4°C. Surface water temperatures in the summer fluctuate differently in various ponds. For example, in Niżni Staw Toporowy, they range from 10.5°C to 21.5°C, in Morskie Oko from 9.4°C to 21.5°C, and in Czarny Staw pod Rysami from 7°C to 11.5°C.[2]
Among the permanent ponds, the lowest one is Pleso pod Zverovkou[pl], while the highest is Modré pleso[pl], both located in the Slovak Tatra Mountains.[1] Some experts believe that the small permanent water bodies known as Batizovské oká[pl] situated above 2,200 meters, should hold the record, but they are often omitted from most maps.[4] In the Polish Tatra Mountains, the lowest lake is Toporowy Staw Niżni (1,089 m), and the highest is Zadni Mnichowy Stawek[pl] (2,070 m).[1]
Compared to the lowland lakes of Poland, Tatra lakes have a small surface area, but some of them are remarkably deep, which is rare among lowland lakes. The largest lakes by surface area are located on the Polish side of the Tatras: Morskie Oko and Wielki Staw Polski. Depending on the measurement, one or the other of these lakes may hold the surface area record. The third-largest by surface area is Czarny Staw pod Rysami. The deepest lake in the Tatras is Wielki Staw Polski (79.3 meters), which is also the third-deepest lake in Poland.[2] Across the entire Tatra range, 8 lakes have a surface area of more than 10 hectares (5 of which are in the Polish Tatras), while 49 lakes are larger than 1 hectare, with 11 of these located in the Polish Tatras. The largest group of lakes is the Plesá Veľkej Studenej doliny[pl], with 27 lakes in a single valley.[1]
Tatra lakes generally have a rounded shape, with short shorelines, and deeply indented bays are rare. Small islands are found in only a few lakes. These islands formed from masses of scree that slid into the lake (e.g., Zmrzlé pleso[pl], Vyšné Žabie pleso Bialčanské[pl]) or are roche moutonnées (rock outcrops) surrounded by water (e.g., Czarny Staw Gąsienicowy[pl], Kurtkowiec).[5] Kurtkowiec contains Poland's highest island (1,689 m). Typically, the shores of the lakes are steep and descend quickly into the depths. The bottoms of larger lakes are usually flat (e.g., in Wielki Staw Polski, 14.4% of the lake bottom is below 70 meters) and muddy; larger boulders are generally found near the rocky walls.[5] The shape, surface area, and depth of the lakes are continuously changing, as these bodies of water are being filled with scree from the steep slopes and sediments carried by streams flowing into them. Some lakes have already disappeared entirely, such as Lejkowy Staw. The current Wielka Polana Małołącka[pl] was once a large lake, which gradually filled with rock debris from the surrounding slopes. Lower-altitude ponds are shrinking due to progressive peat formation.[2]
The duration of ice cover on Tatra lakes depends on their elevation, size, shading, and exposure. Generally, the higher the elevation, the longer the lakes remain frozen. Some of the highest lakes, known as frozen ponds (like Modré pleso[pl]), may remain frozen year-round or thaw for only a brief period.[9]
Lakes that are not shaded and located on the southern slopes of the Tatras tend to thaw earlier. For example, Morskie Oko usually freezes in November and thaws between May and July, while Zadni Staw Gąsienicowy[pl] freezes between September and October and thaws between June and August.[2] The thawing process itself can take weeks; for instance, Zadni Staw Gąsienicowy, despite being small, takes from 5 to 9 weeks to completely thaw due to its high elevation. In contrast, Toporowy Staw Wyżni[pl], located at a lower altitude, can thaw in just between 2 and 3 weeks. During the thawing process, the surface water temperature remains close to 0.[2] High-altitude lakes in the Tatras are also characterized by very thick ice cover during winter. By the end of winter, ice thickness can range from 150 to 375 cm, with the thickest recorded ice cover of 3.75 meters observed on Zadni Staw Polski[pl] in the Valley of Five Polish Ponds[pl].[2] The thickness of the ice and the duration of ice cover can vary greatly from year to year. For example, during the winter of 1950/1951, Morskie Oko did not freeze until January but had already thawed by March.[2]
The structure of winter ice on Tatra lakes resembles that of Alpine lakes. The top layer consists of dry snow, beneath which lies a layer of wet snow and ice, sometimes interspersed with multiple layers of wet snow and ice. This layered structure occurs because the heavy snow from the frequent Tatra snowfalls presses down on the lake’s ice cover, causing it to submerge slightly. Water seeps through cracks in the ice, saturating the snow until an equilibrium is reached between the weight of the displaced water and the weight of the snow.[2]
Shoreline vegetation occurs only in the lower-lying lakes. The lowest lakes and the few foothill lakes contain a lot of humic substances, few mineral salts, are acidic, and are classified as dystrophic lakes.[2] Higher elevation lakes are poor in flora and fauna in terms of biomass, but they exhibit relatively high species diversity. Numerous rotifers, Turbellaria, protozoa, several species of mollusks, and crustaceans are found here. Frogs and newts occur in the lower-lying lakes. Among the invertebrates not found in lowland regions, four species of copepods and 16 species of Turbellaria live in the Tatra lakes.[2]
Fish naturally occurred in only a few lakes, including Morskie Oko and Popradzki Staw. However, some lakes have been artificially stocked, mainly with river trout. The presence of fish affects the overall biodiversity of zooplankton. In fishless lakes, zooplankton is dominated by a single filter feeding species. In Czarny Staw pod Rysami, this is Daphnia pulicaria, while in stocked lakes, species that are harder for fish to catch but have weaker competitive abilities coexist, resulting in more species diversity.[10] The duration of fish populations also affects the behavior of planktonic animals. In fishless lakes, they concentrate in the photic zone, where they feed on phytoplankton and other animals. In lakes where fish have been present for at least several hundred years, they perform large diel vertical migrations, while in lakes stocked only in the last few decades, the vertical migrations are of smaller amplitude. This suggests that under the influence of fish that prey on plankton, zooplankton perform larger vertical migrations, but the process of adapting to the presence of predatory fish takes a long time. In the first few decades after fish appear, these migrations do not reach their maximum amplitude.[11]
The first limnological research in the Tatra Mountains was conducted in 1751 by Jakob Buchholtz[pl], who measured water levels in the Nižné Temnosmrečinské pleso[pl] continuously for a full day. His measurements showed no inflows or outflows, debunking the then-common belief that Tatra lakes were connected to the sea.[5] In 1806, Stanisław Staszic measured the depth of Czarny Staw pod Rysami, but his result (190 meters) significantly deviated from modern measurements.[5]
In 1849, Ludwik Zejszner provided a more reliable depth measurement of Morskie Oko (49 meters). In 1875, Dezső Dénes measured the depth and surface area of Štrbské pleso and Popradské pleso. A little later, Eugeniusz Klemens Dziewulski[pl] studied 8 lakes on the Polish (then Galician) side of the Tatras. His research results included the water level, its temperature and color, shoreline plans, and the lake bottom's topography.[5] The first water temperature measurements at various depths were conducted by Leopold Świerz[pl] in 1876 (he continued these in later years), while between 1890 and 1893, Ludwik Birkenmajer carried out systematic research on the thermal conditions of Tatra lakes in different seasons (about 1,600 measurements).[5] By the late 19th century, interest in lake flora and fauna had also begun. Leading zoological research at the time was Antoni Wierzejski[pl], who discovered several new species of copepods in Tatra lakes, and in 1882, he found the fairy shrimpBranchinecta paludosa in Dwoisty Staw Gąsienicowy[pl]. In the same year, the first chemical analysis of water composition was conducted by Karol Olszewski.[5] In 1909, Ludomir Sawicki[pl], together with Stanisław Minkiewicz[pl], studied 15 lakes on both sides of the Tatras in detail (including measurements, thermal profiles, water transparency, and color) and collected samples for biological research. An outstanding limnologist of the Tatras during this period was Alfred Lityński[pl], whose research covered topics such as fauna, water thermics, ice cover duration, and ice structure.[5]
During the interwar period, many researchers became involved in measuring and mapping the lakes. Józef Szaflarski[pl] was the most active, publishing numerous scientific papers related to Tatra lakes, and his measurements covered a large number of lakes on the southern side of the ridge as well. Jerzy Młodziejowski[pl] was the first to take a closer interest in the lakes of the Western Tatras (Jamnickie Stawy, Bystre Stawy, and Siwe Stawki).[6] In the spring of 1934, all the named permanent lakes of the Polish Tatras (40 in total) were thoroughly surveyed by the Military Geographical Institute.[6] The results of these surveys remain official and are the most commonly referenced to this day.[6] In the Slovak part of the Tatras, most of the water bodies were measured by employees of Tatra National Park, Slovak Academy of Sciences, and Slovak University of Technology in Bratislava between 1961 and 1964 (mapping) and later (supplementing bathymetry, hydrological studies, and determining the altitude of the water surface).[8]
Since the 1960s, Tatra lakes have been studied by scientists from the Institute of Water Biology at the Polish Academy of Sciences.[12] In the 1990s, research was also conducted with the participation of scuba divers.[13] At the end of the 20th century, the fauna of Tatra lakes became the subject of research by the Department of Hydrobiology at the University of Warsaw. Comparing the conditions in fishless lakes, lakes with long-established fish populations, and recently stocked lakes allowed for the verification of several ecological hypotheses regarding the impact of predation pressure on zooplankton populations, including the competitive exclusion principle, diel vertical migrations, pigmentation, and more.[14]
Tatra lakes in art and literature
Štrbské pleso, painting from 1865
As Tatra tourism became popular among the intellectual elite, Tatra lakes inspired painters, poets, and writers. As early as 1825, Jakob Müller painted Štrbské pleso. Among Poles, the first to capture Morskie Oko in 1837 were Jan Nepomucen Głowacki and Adam Gorczyński.[1] Others followed in their footsteps: Maciej Bogusz Stęczyński[pl], Irena Zaborowska, Julia Stabrowska, Leon Wyczółkowski, Stanisław Witkiewicz, Stanisław Gałek[pl], Zenon Pokrywczyński[pl], and more, who created an entire series of paintings depicting the Tatra lakes. Artists from other countries also frequently painted them. Countless photographs and albums of Tatra lakes were also made.[1]
Many legends about the Tatra lakes circulated among the local population. One of the most popular was the myth of Morskie Oko being connected to the sea (hence its name – Eye of the Sea). These legends were described by Kazimierz Przerwa-Tetmajer in his Bajeczny świat Tatr (The Fabulous World of the Tatras).[1] Numerous poets also dedicated works to the Tatra lakes. The first was a poem by Józef Przerwa-Tetmajer[pl] in 1829, followed by Adam Asnyk, Franciszek Nowicki, Kazimierz Przerwa-Tetmajer, Jerzy Liebert, Leopold Lewin, and many others.[1]Stefan Żeromski described Smreczyński Staw in the second volume of Popioły[pl] (The Ashes), and Seweryn Goszczyński in his work Oda (Ode).[15]
Threats
Tatra lakes, like the entire Tatra region, are threatened by the effects of mass tourism. Mountain huts located on their shores have often discharged municipal sewage into the lakes. Waste from a hotel laundry discharged into Popradzki Staw caused a change in the color of its water, and a 6-meter-high cone of hotel waste was discovered at the bottom of the lake.[1] Nowadays, shelters usually have sewage treatment facilities, but tourists remain a threat by throwing large amounts of trash and coins into the lakes. The metals contained in them contaminate the clean water of these lakes. Every year, divers retrieve huge amounts of garbage from the lake bottoms: pots, cans, broken chairs and tables, skis, sleds, and even baby strollers.[1]
The unauthorized stocking of some Tatra lakes with fish by unknown individuals was an ill-considered action with harmful effects on the natural fauna of these lakes. In the cold, oligotrophic Tatra lakes, the fauna of small animals that could serve as food for fish is very scarce. In some lakes, trout have completely died out; in others, a small population lingers, feeding on small invertebrates.[2] The most significant damage was caused by stocking Dwoisty Staw Gąsienicowy[pl]. This lake was home to Branchinecta paludosa, a glacial relictcrustacean, and it was the only habitat of this species in all of Poland. Most likely, fish stocking led to its extinction; in the small lake, trout eradicated the crustacean completely, and the fish themselves perished during the winter.[2] Those responsible for the stocking did not consider that this lake loses water in winter. A thick layer of ice forms on its surface, blocking the water inflow, while the water beneath the ice drains away through underground channels.[2]
Related Research Articles
Zakopane is a town in the south of Poland, in the southern part of the Podhale region at the foot of the Tatra Mountains. From 1975 to 1998, it was part of Nowy Sącz Voivodeship; since 1999, it has been part of Lesser Poland Voivodeship. As of 2017 its population was 27,266. Zakopane is a centre of Goral culture and is often referred to as "the winter capital of Poland". It is a popular destination for mountaineering, skiing, and tourism.
The Tatra Mountains, Tatras, are a series of mountains within the Western Carpathians that form a natural border between Slovakia and Poland. They are the highest mountains in the Carpathians. The Tatras are distinct from the Low Tatras, a separate Slovak mountain range further south.
Rysy is a mountain in the crest of the High Tatras, eastern part of the Tatra Mountains, lying on the border between Poland and Slovakia. Rysy has three summits: the middle at 2,501 m (8,205 ft); the north-western at 2,500 m (8,202 ft); and the south-eastern at 2,473 m (8,114 ft). The north-western summit is the highest point of Poland and belongs to the Crown of Polish Mountains; the other two summits are on the Slovak side of the border.
A moraine-dammed lake, occurs when the terminal moraine has prevented some meltwater from leaving the valley. When a glacier retreats, there is a space left over between the retreating glacier and the piece that stayed intact which holds leftover debris (moraine). Meltwater from both glaciers seep into this space creating a ribbon-shaped lake due to the pattern of ice melt. This ice melt may cause a glacier lake outburst flood, leading to severe damage to the environment and communities nearby. Examples of moraine-dammed lakes include:
The High Tatras or High Tatra Mountains, are a mountain range along the border of northern Slovakia in the Prešov Region, and southern Poland in the Lesser Poland Voivodeship. They are a range of the Tatra Mountains chain.
Tatra National Park is a national park located in the Tatra Mountains in Tatra County, in the Lesser Poland Voivodeship in central-southern Poland. The park is headquartered in the town of Zakopane.
Štrbské pleso is a picturesque mountain lake of glacial origin and a top tourist destination in the High Tatras, Slovakia. It is the second-largest glacial lake on the Slovak side of the High Tatras, after Veľké Hincovo pleso. Maximum depth is 20 metres (66 ft).
Morskie Oko, or Eye of the Sea in English, is the largest and fourth-deepest lake in the Tatra Mountains, in southern Poland. It is located deep within the Tatra National Park in the Rybi Potok Valley, of the High Tatras mountain range at the base of the Mięguszowiecki Summits, in Lesser Poland Voivodeship. In 2014, The Wall Street Journal recognized the lake as one of the five most beautiful lakes in the world.
Czarny Staw pod Rysami, or Black Lake below Mount Rysy in English, is a mountain lake in the Tatra mountains, Southern Poland. It is located on the Polish side of the highest mountain in Poland; Mount Rysy. At 1,583 m above sea level, it overlooks the nearby lake of Morskie Oko. Its maximum depth is 76 m (249 ft), this makes it the Second deepest lake in the Tatra Mountains after Wielki Staw Polski, and fourth deepest in Poland. A walking path circumnavigates the lake, and leads up to Mount Rysy, or down to Morskie Oko.
Lomnický štít is one of the highest and most visited mountain peaks in the High Tatras mountains of Slovakia. Connected by cable car to Tatranská Lomnica, its summit is 2,634 metres (8,642 ft) above sea level, making it the second highest peak in the High Tatras after Gerlachovský štít.
Cochlearia tatrae, the Tatra scurvy-grass, is a flowering plant of the genus Cochlearia in the family Brassicaceae. The plant is endemic to and named after the Tatra Mountains, which in northern Slovakia and southern Poland.
Poland is a country that extends across the North European Plain from the Sudetes and Carpathian Mountains in the south to the sandy beaches of the Baltic Sea in the north. Poland is the fifth-most populous country of the European Union and the ninth-largest country in Europe by area. The territory of Poland covers approximately 312,696 km2 (120,733 sq mi), of which 98.52% is land and 1.48% is water. The Polish coastline was estimated at 770 km (478 mi) in length. Poland's highest point is Rysy, at 2,500 m (8,202 ft).
Wielki Staw Polski - is a tarn located in the High Tatras, at an elevation of 1,665 metres in the Valley of the Five Polish Lakes, by the slope of the Miedziane. It's the second-largest lake by area in the Tatra Mountains, just after Morskie Oko. The lake is located in Poland in the Lesser Poland Voivodeship.
The Kościeliska is a valley in Poland, in Tatra Mountains, Western Tatras, Poland. It stretches from the village of Kiry, about 9 km, right up to the main ridge of the Tatras. Halfway up is the Ornak mountain refuge, built in 1948. Is reached by road from Zakopane - 7 km.
Siklawa Falls is the highest waterfall in the Tatra National Park, Lesser Poland, dropping a total of 70 meters. It is located in the Polish High Tatras in the Roztoka Valley and is also the highest waterfall in the country.
Mickiewicz Falls is a waterfall in the Tatra National Park, Lesser Poland, consisting of three main cascades dropping a total of 10 metres (33 ft).
Black Lake Falls is a waterfall located in the Tatra National Park, High Tatras, Poland, dropping a total of approximately 40 metres (130 ft). The waterfall has been formed on the Black Lake Stream in the Rybi Potok Valley and flows out of Lake Czarny Staw pod Rysami located over Lake Morskie Oko. The waterfall falls down in two main cascades, the upper one lies at 1,570 metres (5,150 ft) above sea level while the lower one is at 1,460 metres (4,790 ft).
The 2003 Tatra Mountains avalanche was an avalanche that occurred on 28 January 2003, sweeping away nine out of a thirteen-member group heading to the summit of Rysy in the Tatra Mountains. The participants of the trip were students from the Leon Kruczkowski High School in Tychy and individuals associated with the school's sports club Pion.
The Eye of the Sea Park is an urban park in Warsaw, Poland. It is located in the neighbourhoods of Old Mokotów and Sielce, within the district of Mokotów, between Puławska Street, Dworkowa Street, Morskie Oko Street, Promenada Street, Belwederska Street, Zajączkowska Street, and Spacerowa Street. It has the total area of 17.9 ha. It was originally developed in 1774, and its current form, in 1958.
Krasiński Garden Pond is a small artificial lake in Warsaw, Poland, within the neighbourhood of Muranów in the Downtown district. It is located in the Krasiński Garden, and has an area of 0.1443 ha. The lake was formed between 1891 and 1895.
↑ Szaflarski, Józef (1936). "Morfometrja jezior tatrzańskich. Cz. I: Jeziora Tatr Polskich". Prace Instytutu Geograficznego Uniwersytetu Jagiellońskiego (in Polish). 17.
↑ Kownacki, Andrzej (2012). "Moja przygoda z hydrobiologią"(PDF). Wiadomości Hydrobiologiczne (in Polish). 198 (2). Polskie Towarzystwo Hydrobiologiczne: 16–22. Archived from the original(PDF) on 2013-11-10.
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