Changes in nutrient concentration and water level affect the microbial loop: a 6-month mesocosm experiment.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F23%3A00618199" target="_blank" >RIV/60077344:_____/23:00618199 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/s10452-023-10015-z" target="_blank" >https://doi.org/10.1007/s10452-023-10015-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10452-023-10015-z" target="_blank" >10.1007/s10452-023-10015-z</a>

Result language

angličtina

Original language name

Changes in nutrient concentration and water level affect the microbial loop: a 6-month mesocosm experiment.

Original language description

Eutrophication and lake depth are of key importance in structuring lake ecosystems. To elucidate the effect of contrasting nutrient concentrations and water levels on the microbial community in fully mixed shallow lakes, we manipulated water depth and nutrients in a lake mesocosm experiment in north temperate Estonia and followed the microbial community dynamics over a 6-month period. The experiment was carried out in Lake Vortsjarv-a large, shallow eutrophic lake. We used two nutrient levels crossed with two water depths, each represented by four replicates. We found treatment effects on the microbial food web structure, with nutrients having a positive and water depth a negative effect on the biomasses of bacterial and heterotrophic nanoflagellates (HNF) (RM-ANOVA, p < 0.05). Nutrients affected positively and depth negatively the mean size of individual HNF and ciliate cells (RM-ANOVA, p < 0.05). The interactions of depth and nutrients affected positively the biomass of bacterivorous and bacteri-herbivorous ciliates and negatively the biomass of predaceous ciliates (RM-ANOVA, p < 0.05). Bacterivorous ciliates had lowest biomass in shallow and nutrient-rich mesocosms, whilst predaceous ciliates had highest biomass here, influencing trophic interactions in the microbial loop. Overall, increased nutrient concentrations and decreased water level resulted in an enhanced bacterial biomass and a decrease in their main grazers. These differences appeared to reflect distinctive regulation mechanisms inside the protozoan community and in the trophic interactions in the microbial loop community.

Czech name

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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

<a href="/en/project/GA22-33245S" target="_blank" >GA22-33245S: Effects of extreme weather events on seasonal dynamics of planktonic assemblages and reservoir water quality</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Aquatic Ecology

ISSN

1386-2588

e-ISSN

1573-5125

Volume of the periodical

57

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

13

Pages from-to

369-381

UT code for WoS article

000950415200001

EID of the result in the Scopus database

2-s2.0-85150221557