Post-mining lakes - Czechia

Basic Information
Site Name
Post-mining lakes
Short name
Post-mining lakes
Country
Czechia
Site Manager
Site Description
Large-scale opencast mining of brown coal represents a significant and devastating intervention in the natural environment. As a close to nature and economically acceptable method of reclamation of residual mine pits, the hydric method of reclamation is used, when lakes are created from quarries. The creation of a new lake in a former mining area essentially represents a large-scale ecological experiment, during which a number of specific factors are involved with impacts on individual organisms, multiple trophic levels and interactions, even entire food chains, and ultimately the lake water quality. Post-mining lakes (Medard Lake – 490 ha, max. depth 50 m, 400 m a.s.l., Milada Lake – 245 ha, max. depth 25 m, 145 m a.s.l., Most Lake – 310 ha, max. depth 75 m, 199 m a.s.l.) thus represent unique LTER areas for studying ecological processes in large natural lentic ecosystems. The ongoing research is focused mainly on (i) the structuring effect of submerged macrophytes on trophic relationships and distribution of fish in deep lakes, (ii) the effects of intra- and interspecific interactions on the succession of fish communities, and (iii) the effects of anthropogenic use and long-term changes on water quality, composition, periphyton composition and phytoplankton structure and biomass.
Last modified
2023-05-22 08:05:20

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General Characteristics and Status
Site Status
Operational
Year Established
2001
Observed properties
Photos
Medard Lake (© Petr Znachor).
Medard Lake (© Petr Znachor).
Medard Lake, view from the northeast.
Medard Lake, view from the northeast.
Medard Lake, catch processing.
Medard Lake, catch processing.
Medard Lake, return from setting long-lines (© Lukáš Vejřík).
Medard Lake, return from setting long-lines (© Lukáš Vejřík).
Merdard Lake, Northern pike catch (© Lukáš Vejřík).
Merdard Lake, Northern pike catch (© Lukáš Vejřík).
Medard Lake, hydroacoustic boat.
Medard Lake, hydroacoustic boat.
Medard Lake, going for setting the gillnets.
Medard Lake, going for setting the gillnets.
Medard Lake, return from sampling.
Medard Lake, return from sampling.
Medard Lake, sunrise.
Medard Lake, sunrise.
Medard Lake, processing maraena whitefish catch.
Medard Lake, processing maraena whitefish catch.
Milada Lake (© Petr Znachor).
Milada Lake (© Petr Znachor).
Milada Lake, view from the north.
Milada Lake, view from the north.
Milada Lake (© Michaela Holubová).
Milada Lake (© Michaela Holubová).
Milada Lake, electrofishing (© Lukáš Vejřík).
Milada Lake, electrofishing (© Lukáš Vejřík).
Milada Lake, Northern pike catch (© Lukáš Vejřík).
Milada Lake, Northern pike catch (© Lukáš Vejřík).
Milada Lake, catch processing.
Milada Lake, catch processing.
Milada Lake, young of the year fish.
Milada Lake, young of the year fish.
Milada Lake, tench.
Milada Lake, tench.
Milada Lake, macrophyte community.
Milada Lake, macrophyte community.
Milada Lake, macrophyte community diversity.
Milada Lake, macrophyte community diversity.
Most Lake (© Petr Znachor).
Most Lake (© Petr Znachor).
Most Lake, return from setting the gillnets.
Most Lake, return from setting the gillnets.
Most Lake, stocking maraena whitefish.
Most Lake, stocking maraena whitefish.
Most Lake, electrofishing (© Lukáš Vejřík).
Most Lake, electrofishing (© Lukáš Vejřík).
Most Lake, catch processing.
Most Lake, catch processing.
Most Lake, European catfish.
Most Lake, European catfish.
Most Lake, Northern pike (© Michaela Holubová).
Most Lake, Northern pike (© Michaela Holubová).
Most Lake, perch egg strands.
Most Lake, perch egg strands.
Most Lake, algae.
Most Lake, algae.
Most Lake, sunset.
Most Lake, sunset.
Most Lake, going for setting the gillnets.
Most Lake, going for setting the gillnets.
Most Lake, maintenance of acoustic telemetry system.
Most Lake, maintenance of acoustic telemetry system.
Most Lake, sunset.
Most Lake, sunset.
Most Lake, maraena whitefish catch.
Most Lake, maraena whitefish catch.
Most Lake, maraena whitefish catch.
Most Lake, maraena whitefish catch.
Geographic
Elevation (average)
250.00msl
Elevation (min)
145.00msl
Elevation (max)
400.00msl
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