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http://hdl.handle.net/20.500.12128/9396
Tytuł: | Conditions for development of anthropogenic meromictic reservoirs in the workings of crystalline rocks (based on the examples of the quarries of the Zulovska pahorkatina, NE Czech Republic) |
Autor: | Molenda, Tadeusz |
Słowa kluczowe: | Meromixis; Holomixis; Quarry reservoir; Organic matter; DOC; Plant colonisation |
Data wydania: | 2015 |
Źródło: | Environmental Earth Sciences, Vol. 74, iss. 3 (2015), s. 2259-2271 |
Abstrakt: | There are numerous anthropogenic water
reservoirs in the vicinity of the Z ˇ ulovska´ pahorkatina
(northern Czech Republic). The vast majority of them have
developed as a result of the flooding of the abandoned
quarries of crystalline rocks (granites or granodiorites). The
surface area of these water bodies is small and is
\6000 m2. These are, however, very deep reservoirs of up
to 25 m. Permanent water stratification has been recorded
in some of them; these are meromictic reservoirs. The
development of the phenomenon of meromixis in the
reservoirs that were studied was conditioned by the supply
of organic matter from the catchment. The biochemical
process of organic matter decomposition led to the release
of ions, mainly NH4
?. The accumulation of dissolved
substances in the benthic zone initiated the meromixis
phenomenon. Therefore, the water bodies that were tested
can be classified as reservoirs of the biogenic type of
meromixis. This article presents the stages of the evolution
of a holomictic reservoir into a meromictic one. Three
water bodies in which meromixis was recorded were selected
for the study. The control object was an abandoned
quarry reservoir with no meromixis. |
URI: | http://hdl.handle.net/20.500.12128/9396 |
DOI: | 10.1007/s12665-015-4217-x |
ISSN: | 1866-6280 |
Pojawia się w kolekcji: | Artykuły (WNP)
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