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| Plešné Lake | |
|---|---|
| Name | Plešné Lake |
| Location | Bohemian Forest / Šumava National Park, Czech Republic |
| Type | glacial |
| Inflow | springs, runoff |
| Outflow | Plešný potok |
| Basin countries | Czech Republic |
| Area | ~2.7ha |
| Max-depth | ~40m |
| Elevation | ~1098m |
Plešné Lake Plešné Lake is a high‑altitude glacial lake in the Bohemian Forest region of the Czech Republic, located near the border with Austria and close to Bavaria. The lake lies within the Šumava National Park and forms part of a chain of mountain tarns in Central Europe, attracting scientists from institutions such as the Czech Academy of Sciences, University of Prague, and international researchers from University of Vienna and Ludwig Maximilian University of Munich. It is notable for its oligotrophic waters, distinctive glacial morphology, and importance for regional conservation and recreation.
Plešné Lake sits in the northwestern sector of the Bohemian Forest mountain range, within the administrative region of Plzeň Region near the border with Upper Austria and the German state of Bavaria. The lake is encompassed by the protected landscape of Šumava National Park and lies in proximity to geographic features such as Plechý (mountain), Trojmezná hora, and the transboundary conservation area linking to the Bavarian Forest National Park. Access routes approach from settlements including Železná Ruda and trailheads associated with the European long-distance paths, connecting to cross‑border corridors overseen by agencies such as the European Environment Agency.
Plešné Lake originated as a cirque tarn formed during the Last Glacial Maximum under conditions shared with nearby glacial basins like Čertovo jezero and moraines resembling those in Krkonoše Mountains. The basin is carved primarily into crystalline rocks of the Bohemian Massif, with local lithology dominated by granite and gneiss similar to exposures at Šumava granite quarries. Pleistocene glaciation sculpted the amphitheater‑shaped cirque, leaving terminal and lateral moraines that influence modern sedimentation patterns studied by geologists from Masaryk University and the Institute of Geology of the Czech Academy of Sciences.
The lake is fed by groundwater springs and surface runoff from surrounding slopes and drains via the outflow stream Plešný potok, contributing to the Vltava catchment indirectly through downstream tributaries. With an approximate surface area of 2.7 hectares and a maximum depth near 40 metres, the lake exhibits thermal stratification typical of cold, high‑elevation tarns studied in comparative surveys including work from University of Innsbruck and Charles University in Prague. Water clarity and chemical profiles show low nutrient concentrations, aligning Plešné Lake with oligotrophic systems monitored by agencies such as the Czech Hydrometeorological Institute and international limnology networks.
Plešné Lake supports a specialized assemblage of alpine and subalpine flora and fauna. Aquatic communities include cold‑adapted macroinvertebrates and benthic assemblages comparable to those catalogued in the Lake District and Alps studies, and the littoral zones feature peat and sphagnum communities akin to those in Torfmoore habitats. Surrounding forests contain stands of Norway spruce and European beech similar to those studied in Krkonoše National Park, providing habitat for vertebrates such as Eurasian lynx, red deer, and avian species including capercaillie and black grouse. Conservationists from organizations like WWF and the IUCN highlight the lake's role as a refuge for glacial relict species and a site for long‑term ecological monitoring.
The Plešné Lake area has a human history intertwined with borderland dynamics between the Austro‑Hungarian Empire and later states such as Czechoslovakia and the Czech Republic. Local industries historically included timber extraction and glassmaking linked to towns like Železná Ruda and cultural artifacts connected to the Bohemian Forest heritage. The landscape figures in regional literature and cartography produced by scholars at Charles University and artists associated with the Czech National Revival, and the site is included in cultural itineraries promoted by the Czech Tourist Club and regional museums.
Plešné Lake is a focal point for hiking, nature observation, and scientific fieldwork within Šumava National Park regulations enforced by the Nature Conservation Agency of the Czech Republic. Trails connect to international routes used by hikers from Germany, Austria, and beyond, with visitor management modeled on approaches from Bavarian Forest National Park and transboundary initiatives under the European Green Belt. Conservation measures balance recreation with protection of water quality and habitats, incorporating monitoring programs by the Czech Hydrometeorological Institute and biodiversity surveys coordinated with the Czech Academy of Sciences.
Category:Lakes of the Czech Republic Category:Bohemian Forest Category:Šumava National Park