Energy-based top-down and bottom-up relationships between fish community energy demand or production and phytoplankton across lakes at a continental scale

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F20%3A00538412" target="_blank" >RIV/60077344:_____/20:00538412 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1002/lno.11434" target="_blank" >https://doi.org/10.1002/lno.11434</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/lno.11434" target="_blank" >10.1002/lno.11434</a>

Result language

angličtina

Original language name

Energy-based top-down and bottom-up relationships between fish community energy demand or production and phytoplankton across lakes at a continental scale

Original language description

Fish community feeding and production rates may differ between lakes despite similar fish biomass levels because of differences in size structure and local temperature. Therefore, across-lake comparisons of the strength and direction of top-down and bottom-up fish-phytoplankton relationships should consider these factors. We used the metabolic theory of ecology to calculate size- and temperature-corrected community energy demand (CEDom) and community production (CP) of omnivorous fishes in 227 European lakes from major habitat types (MHTs) of polar freshwaters, temperate floodplain rivers and wetlands, and temperate coastal rivers. We related CEDom with total phosphorus (TP)-corrected chlorophyll a (Chl a) concentrations to evaluate a potential top-down directed trophic cascade from fish to phytoplankton. Furthermore, we related Chl a with CP to demonstrate potential bottom-up effects of phytoplankton on fish. For both analyses, we added the CED of piscivorous fishes (CEDpi) as a predictor to account for potential predation effects on the omnivorous fish community. CEDom was weakly positively related with TP-corrected Chl a, but the strength of the relationship differed between MHTs. In contrast, CP was consistently positively related with Chl a in the entire dataset. CEDpi did not contribute to top-down or bottom-up relationships. The application of metabolic variables characterizing fish community feeding and production rates makes these results robust because the approach accounted for the usually neglected effects of fish size and temperature in across-lake comparisons. Our results suggest that bottom-up effects from phytoplankton on fish secondary production in lakes are substantially stronger than top-down effects from fish on phytoplankton biomass.

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

10618 - Ecology

Project

<a href="/en/project/EF16_025%2F0007417" target="_blank" >EF16_025/0007417: Biomanipulation as a tool for improving water quality of dam reservoirs</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Limnology and Oceanography

ISSN

0024-3590

e-ISSN

—

Volume of the periodical

65

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

892-902

UT code for WoS article

000515229100001

EID of the result in the Scopus database

2-s2.0-85083688068