Original title: Nevstoupíš dvakrát do téhož rybníka aneb vývoj rybničních ekosystémů od Šusty k hypertrofii
Translated title: You cannot step into the same fishpond twice - an evolution of fishpond ecosystems to hypertrophy
Authors: Vrba, Jaroslav ; Benedová, Z. ; Jezberová, Jitka ; Matoušů, Anna ; Musil, M. ; Nedoma, Jiří ; Pechar, L. ; Potužák, J. ; Řeháková, Klára ; Šimek, Karel ; Šorf, M. ; Zemanová, J.
Document type: Papers
Conference/Event: Rybníky 2018, Praha (CZ), 20180614
Year: 2018
Language: cze
Abstract: Shallow manmade fishponds in south Bohemia were used for fish production for centuries, however, their ecosystems have changed dramatically due to excessive nutrient loading and fish stocking. Preliminary results of ten sampled fishponds suggested their hypertrophic status at present, while their plankton structure and dynamics reflected the actual size/age class of fish stock consisting predominantly of common carp. Planktivorous fish (both young carp and whitefish) remarkably reduced abundance, size, and species diversity of crustacean zooplankton, in particular large daphnids, whereas larger carp itself did not cause such a strong top-down effect. All other plankton components, i.e. phytoplankton, bacteria, protists, and rotifers showed rather high abundance and diversity, and suggested a reasonable impact of various microbial processes and interactions in the recent hypertrophic ecosystems.
Keywords: diversity; food webs; hypertrophic fishponds; nutrients; plankton
Project no.: GA17-09310S (CEP)
Funding provider: GA ČR
Host item entry: Rybníky 2018, ISBN 978-80-01-06452-8, ISSN 2570-5075

Institution: Biology Centre AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0291620

Permalink: http://www.nusl.cz/ntk/nusl-391453


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