Original title: Diverzita stojatých vod v nivách řek a procesy jejího vzniku a udržování
Translated title: Biodiversity of standing floodplain waters and processes of its formation and preservation
Authors: Pithart, David
Document type: Papers
Conference/Event: Říční krajina /3./, Olomouc (CZ), 2005-10-05 / 2005-10-06
Year: 2005
Language: cze
Abstract: [cze] [eng]
Biodiverzita tůní a stojatých vod v říčních ramenech v říčních nivách je chápána v tomto příspěvku v širším slova smyslu jako biodiverzita založená nejen na počtu druhů, ale jako celková různorodost vodních biotopů.. V konceptu je zahrnut i chemismus vody, morfologie lokalit, jejich pozice v nivě vzhledem ke zdrojům vody, kterými jsou syceny a charakter jejich okolí, který ovlivňije zejména vegetaci. Water chemistry and planktic communities in the naturally eutrophic alluvial waters in the Lužnice floodplain have been studied. The floofplain waters are naturally eutrophic, with strong vertical physico-chemical gradients and oxygen depletions at the botom. Small pools and backwaters of this type have unique phytoplankton structure. Prevailing dominance of flegellates, namely Cryptophyceae, and low proportion of green chlorococcal algae and Diatoms, and almost absence of Cyanophyceae are very unusual for such eutrophic waters. Flagellate dominate thanks their ability to keep the vertical position in a permanently light limited conditions (resulted from poorly mixed water columns and intensive shading of water surface by vegetation). Floodplain geodiversity play crucial role, determining morphology and location of pools and backwaters, their exposition to flooding and inflows of underground water. Terrestial vegetation effects light exposition, leaf litter.
Keywords: backwater; biodiversity; dynamics; plankton; polls
Project no.: CEZ:AV0Z60870520 (CEP), SL/1/6/04 (CEP)
Funding provider: GA MŽP
Host item entry: Říční krajina, ISBN 80-244-1162-8

Institution: Global Change Research Institute AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0115479

Permalink: http://www.nusl.cz/ntk/nusl-32739


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Research > Institutes ASCR > Global Change Research Institute
Conference materials > Papers