Differences in the plankton communities of newly-created small fishponds under different fishery management regimes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F23%3A43923435" target="_blank" >RIV/62156489:43210/23:43923435 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1127/fal/2023/1497" target="_blank" >https://doi.org/10.1127/fal/2023/1497</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1127/fal/2023/1497" target="_blank" >10.1127/fal/2023/1497</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Differences in the plankton communities of newly-created small fishponds under different fishery management regimes

Popis výsledku v původním jazyce

Fishponds are man-made shallow waterbodies with ecosystems that mainly rely on fishery management. It is generally assumed that a fishpond&apos;s plankton assemblage structure results from a combination of bottom-up and top-down effects; however, knowledge about the development of plankton in newly-created fishponds with differing fish stock biomass is scarce. To address this, we investigated plankton community development over two years in five newly-created fishponds in the Czech Republic, Central Europe. The main cultured fish species in the fishponds were tench (Tinca tinca) and pikeperch (Sander lucioperca). In addition, the invasive and zooplanktivorous topmouth gudgeon (Pseudorasbora parva) was regularly present and probably reduced zooplankton abundance. The results indicated that the plankton communities were mainly composed of smaller-sized zooplankton taxa, especially rotifers (Asplanchna Brachionus Keratella Filinia) and cladocerans (mainly Bosmina longirostris). The phytoplankton was dominated by green algae, with the exception of one fishpond with high phosphorus and nitrogen concentrations, which was dominated by the cyanobacterium Planktothrix aghardii. The main factors determining both phytoplankton and zooplankton development were total phosphorus, total nitrogen, water transparency and chlorophyll-a concentration, which together explained a significant part of the variability (phytoplankton 47 %, zooplankton 70 %). The effect of fishery management was not significant, though the presence of topmouth gudgeon was found to be an important factor, being negatively correlated with the stocking of farmed fish. Overall, the availability, concentration and relative ratio of key nutrients was of critical importance in the development of fishpond plankton communities.

Název v anglickém jazyce

Differences in the plankton communities of newly-created small fishponds under different fishery management regimes

Popis výsledku anglicky

Fishponds are man-made shallow waterbodies with ecosystems that mainly rely on fishery management. It is generally assumed that a fishpond&apos;s plankton assemblage structure results from a combination of bottom-up and top-down effects; however, knowledge about the development of plankton in newly-created fishponds with differing fish stock biomass is scarce. To address this, we investigated plankton community development over two years in five newly-created fishponds in the Czech Republic, Central Europe. The main cultured fish species in the fishponds were tench (Tinca tinca) and pikeperch (Sander lucioperca). In addition, the invasive and zooplanktivorous topmouth gudgeon (Pseudorasbora parva) was regularly present and probably reduced zooplankton abundance. The results indicated that the plankton communities were mainly composed of smaller-sized zooplankton taxa, especially rotifers (Asplanchna Brachionus Keratella Filinia) and cladocerans (mainly Bosmina longirostris). The phytoplankton was dominated by green algae, with the exception of one fishpond with high phosphorus and nitrogen concentrations, which was dominated by the cyanobacterium Planktothrix aghardii. The main factors determining both phytoplankton and zooplankton development were total phosphorus, total nitrogen, water transparency and chlorophyll-a concentration, which together explained a significant part of the variability (phytoplankton 47 %, zooplankton 70 %). The effect of fishery management was not significant, though the presence of topmouth gudgeon was found to be an important factor, being negatively correlated with the stocking of farmed fish. Overall, the availability, concentration and relative ratio of key nutrients was of critical importance in the development of fishpond plankton communities.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40103 - Fishery

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Fundamental and Applied Limnology

ISSN

1863-9135

e-ISSN

2363-7110

Svazek periodika

197

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

12

Strana od-do

25-36

Kód UT WoS článku

000982897300001

EID výsledku v databázi Scopus

2-s2.0-85178349178