Zooplankton Community Development Dynamics during a Year in a Reservoir with Implemented Biomanipulation of Fish Stock

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F16%3A43910140" target="_blank" >RIV/62156489:43210/16:43910140 - isvavai.cz</a>

Výsledek na webu

<a href="https://mnet.mendelu.cz/mendelnet2016/mnet_2016_full.pdf" target="_blank" >https://mnet.mendelu.cz/mendelnet2016/mnet_2016_full.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Zooplankton Community Development Dynamics during a Year in a Reservoir with Implemented Biomanipulation of Fish Stock

Popis výsledku v původním jazyce

This paper deals with the relationship between zooplankton, phytoplankton, and fish communities in a water reservoir, with implemented long-term biomanipulation measures to improve water quality. The Water Reservoir Hamry is located near the village of Hlinsko in the Czech-Moravian Highlands. It has a meso-eutrophic character and it is one of the smaller and shallower water reservoirs with an area of 42 ha of water surface and average depth of 2 meters. Bio-manipulation measures in this reservoir have been implemented and monitored since 2008. Assessment of zooplankton, phytoplankton, and fish community monitoring was conducted in the 2015 season, from March to November. Simultaneously, catches of unwanted fish were carried out in order to promote top-down effect in the reservoir. The resulting values of planktonic communities have proven to be mostly negative - almost a monoculture of cyanobacteria in the phytoplankton communities for much of the growing season, negative size ratio of zooplankton, and small overall density of organisms. These values for zooplankton indicate that when the bottom-up processes dominate, the effect of biomanipulation does not have to be demonstrably successful. On the contrary, due to excessive eutrophication of the reservoir associated with inappropriate structure of phytoplankton, the filtration pressure of zooplankton is prevented. As a result, process of improving the water quality in the reservoir via biomanipulation cannot effectively take place.

Název v anglickém jazyce

Zooplankton Community Development Dynamics during a Year in a Reservoir with Implemented Biomanipulation of Fish Stock

Popis výsledku anglicky

This paper deals with the relationship between zooplankton, phytoplankton, and fish communities in a water reservoir, with implemented long-term biomanipulation measures to improve water quality. The Water Reservoir Hamry is located near the village of Hlinsko in the Czech-Moravian Highlands. It has a meso-eutrophic character and it is one of the smaller and shallower water reservoirs with an area of 42 ha of water surface and average depth of 2 meters. Bio-manipulation measures in this reservoir have been implemented and monitored since 2008. Assessment of zooplankton, phytoplankton, and fish community monitoring was conducted in the 2015 season, from March to November. Simultaneously, catches of unwanted fish were carried out in order to promote top-down effect in the reservoir. The resulting values of planktonic communities have proven to be mostly negative - almost a monoculture of cyanobacteria in the phytoplankton communities for much of the growing season, negative size ratio of zooplankton, and small overall density of organisms. These values for zooplankton indicate that when the bottom-up processes dominate, the effect of biomanipulation does not have to be demonstrably successful. On the contrary, due to excessive eutrophication of the reservoir associated with inappropriate structure of phytoplankton, the filtration pressure of zooplankton is prevented. As a result, process of improving the water quality in the reservoir via biomanipulation cannot effectively take place.

Druh

D - Stať ve sborníku

CEP obor

GL - Rybářství

OECD FORD obor

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Projekt

<a href="/cs/project/QJ1620240" target="_blank" >QJ1620240: Aplikace biomanipulací s využitím "top-down" efektu s cílem omezit negativní dopady zemědělství na eutrofizaci vodárenských nádrží</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

MendelNet 2016: Proceedings of International PhD Students Conference

ISBN

978-80-7509-443-8

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

308-313

Název nakladatele

Mendelova univerzita v Brně

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

9. 11. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000392968500056