Seasonal Development of Phytoplankton in South Bohemian Fishponds (Czechia)

Result code in 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>

Alternative codes found

RIV/60076658:12310/22:43904518

Result on the web

<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>

Result language

angličtina

Original language name

Seasonal Development of Phytoplankton in South Bohemian Fishponds (Czechia)

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10617 - Marine biology, freshwater biology, limnology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2022

Confidentiality

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

Name of the periodical

Water

ISSN

2073-4441

e-ISSN

2073-4441

Volume of the periodical

14

Issue of the periodical within the volume

13

Country of publishing house

CH - SWITZERLAND

Number of pages

15

Pages from-to

nestrankovano

UT code for WoS article

000823903200001

EID of the result in the Scopus database

2-s2.0-85133030484