PHYSICO-CHEMICAL FEATURES OF WATERS AND BIOCOENOSIS OF A MEROMICTIC RESERVOIR IN THE YEARS 1981-1998 IN THE LEKNICA REGION (WESTERN POLAND)
DOI:
https://doi.org/10.17770/etr2001vol1.1943Keywords:
post-mining water reservoirs, meromixis, acidotrophic lakesAbstract
The research concerned the biggest, the deepest and the youngest (25 years old) acidotrophic reservoir located 4 km south-east from Lqknica. It was created as a result of brown-coal mining and opencast method. The present pyrite was the cause of significant acidifying and salinity of waters. 17 years of physico-chemical examinations of waters showed a progressive difference between mixo- and monimolimnion that is increase or decrease of such indicators as pH, redox potential, total iron, sulphate and others. First symptoms of ageing o f the reservoir were visible. Biological examinations showed pancity of plant and animal species living in this reservoir and a very slow development ofbiocoenosis. The research concerned the biggest, the deepest and the youngest (25 years old) acidotrophic reservoir located 4 km south-east from Lqknica. It was created as a result of brown-coal mining and opencast method. The present pyrite was the cause for significant acidifying and salinity of waters. 17 years of physico-chemical examinations of waters showed a progressive difference between mixo- and monimolimnion that is increase or decrease o f such indicators as pH, redox potential, total iron, sulphate and others. First symptoms of ageing o f the reservoir were visible. Biological examinations showed pancity of plant and animal species living in this reservoir and a very slow development of biocoenosis.Downloads
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