Nevstoupíš dvakrát do téhož rybníka aneb vývoj rybničních ekosystémů od Šusty k hypertrofii

0497257 - BC 2019 CZ cze K - Conference Paper (Czech conference)
Vrba, Jaroslav - Benedová, Z. - Jezberová, Jitka - Matoušů, Anna - Musil, M. - Nedoma, Jiří - Pechar, L. - Potužák, J. - Řeháková, Klára - Šimek, Karel - Šorf, M. - Zemanová, J.
Nevstoupíš dvakrát do téhož rybníka aneb vývoj rybničních ekosystémů od Šusty k hypertrofii.
[You cannot step into the same fishpond twice - an evolution of fishpond ecosystems to hypertrophy.]
Rybníky 2018. Praha: ČVUT v Praze, 2018 - (David, V.; Davidová, T.), s. 2-11. ISBN 978-80-01-06452-8. ISSN 2570-5075.
[Rybníky 2018. Praha (CZ), 14.06.2018-15.06.2018]
R&D Projects: GA ČR(CZ) GA17-09310S
Institutional support: RVO:60077344
Keywords : hypertrophic fishponds * nutrients * plankton * diversity * food webs
OECD category: Marine biology, freshwater biology, limnology

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.
Permanent Link: http://hdl.handle.net/11104/0291620