Seasonal Development of Phytoplankton in South Bohemian Fishponds (Czechia)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F22%3A43904518" target="_blank" >RIV/60076658:12520/22:43904518 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60076658:12310/22:43904518

Výsledek na webu

<a href="https://doi.org/10.3390/w14131979" target="_blank" >https://doi.org/10.3390/w14131979</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/w14131979" target="_blank" >10.3390/w14131979</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Seasonal Development of Phytoplankton in South Bohemian Fishponds (Czechia)

Popis výsledku v původním jazyce

Fishponds with a relatively small water volume, high fish abundance, and wide range of nutrient concentrations serve as suitable models for ecological studies. Intensified fish production, together with increased input of nutrients from the watershed, resulted in hypertrophic conditions in the majority of fishponds, the most common type of lentic ecosystems worldwide. In order to understand the processes driving plankton succession, we analyzed eight-year data from nine fishponds in Czechia with differing trophic status. The mean concentration of phosphorus (P) was 200 mu g L-1 in hypertrophic ponds, 130 mu g L-1 in eutrophic, and 40 mu g L-1 in mesotrophic. Correspondingly the mean concentration of phytoplankton was 14.9 mg L-1 in hypertrophic ponds, 7.3 mg L-1 in eutrophic, and 1.96 mg L-1 in mesotrophic. Although the fish stock of 200-900 kg ha(-1) eliminated zooplankton in eutrophic and hypertrophic ponds the faster-growing algae did not prevail over cyanobacteria. Zooplankton grazing pressure on algae is thus not relevant in studied food webs. Due to the rapid biological denitrification in hypertrophic and eutrophic fishponds resulting in low concentration of mineral nitrogen (N), these ponds were dominated by N-fixing cyanobacteria throughout the whole season. Similarly, the faster-growing algae prevail over cyanobacteria in mesotrophic ponds until the decrease of available mineral nitrogen. The limitation by mineral N is thus the primary driver of phytoplankton composition reflected in cyanobacterial dominance, independently of the trophic status and fish density in studied fishponds.

Název v anglickém jazyce

Seasonal Development of Phytoplankton in South Bohemian Fishponds (Czechia)

Popis výsledku anglicky

Fishponds with a relatively small water volume, high fish abundance, and wide range of nutrient concentrations serve as suitable models for ecological studies. Intensified fish production, together with increased input of nutrients from the watershed, resulted in hypertrophic conditions in the majority of fishponds, the most common type of lentic ecosystems worldwide. In order to understand the processes driving plankton succession, we analyzed eight-year data from nine fishponds in Czechia with differing trophic status. The mean concentration of phosphorus (P) was 200 mu g L-1 in hypertrophic ponds, 130 mu g L-1 in eutrophic, and 40 mu g L-1 in mesotrophic. Correspondingly the mean concentration of phytoplankton was 14.9 mg L-1 in hypertrophic ponds, 7.3 mg L-1 in eutrophic, and 1.96 mg L-1 in mesotrophic. Although the fish stock of 200-900 kg ha(-1) eliminated zooplankton in eutrophic and hypertrophic ponds the faster-growing algae did not prevail over cyanobacteria. Zooplankton grazing pressure on algae is thus not relevant in studied food webs. Due to the rapid biological denitrification in hypertrophic and eutrophic fishponds resulting in low concentration of mineral nitrogen (N), these ponds were dominated by N-fixing cyanobacteria throughout the whole season. Similarly, the faster-growing algae prevail over cyanobacteria in mesotrophic ponds until the decrease of available mineral nitrogen. The limitation by mineral N is thus the primary driver of phytoplankton composition reflected in cyanobacterial dominance, independently of the trophic status and fish density in studied fishponds.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10617 - Marine biology, freshwater biology, limnology

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

2022

Kód důvěrnosti údajů

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

Název periodika

Water

ISSN

2073-4441

e-ISSN

2073-4441

Svazek periodika

14

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

15

Strana od-do

nestrankovano

Kód UT WoS článku

000823903200001

EID výsledku v databázi Scopus

2-s2.0-85133030484