Temperature and prey density jointly influence trophic and non-trophic interactions in multiple predator communities

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F19%3A43899445" target="_blank" >RIV/60076658:12310/19:43899445 - isvavai.cz</a>

Alternative codes found

RIV/60077344:_____/19:00511997 RIV/60076658:12520/19:43899445

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.13387" target="_blank" >https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.13387</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/fwb.13387" target="_blank" >10.1111/fwb.13387</a>

Result language

angličtina

Original language name

Temperature and prey density jointly influence trophic and non-trophic interactions in multiple predator communities

Original language description

Environmental changes such as global warming can affect ecological communities by altering individual life histories and species interactions. Recent studies focusing on the consequences of environmental change on species interactions highlighted the need for a wider, multi-species context including both trophic and non-trophic interactions (e.g. predator interference). However, the effects of biotic and abiotic factors on trophic and non-trophic interactions remain largely unexplored. To fill this gap, we combined laboratory experiments and functional response modelling to investigate how temperature and prey density influence trophic and non-trophic interactions in multiple predator communities. The system under study consisted of predatory dragonfly larvae (Aeshna cyanea) and omnivorous marbled crayfish (Procambarus virginalis) preying on common carp fry (Cyprinus carpio). We estimated the functional response of each predator in single-predator experiments and used this information to disentangle the trophic and non-trophic interactions and their dependence on environmental conditions in multiple predator trials. We found that consumer identity, prey density, and temperature all affect the magnitude of trophic and non-trophic interactions. Non-trophic interactions mostly decreased predator feeding rates, corroborating previous observations that interference prevails in aquatic communities. Moreover, trophic interactions depended primarily on the environmental variables whereas non-trophic interactions depended mainly on consumer identity. Our results indicate that non-trophic interactions among true predators and omnivores can be substantial and that biotic and abiotic conditions further modify the magnitude and direction of these interactions, which can affect food web dynamics and stability.

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

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

2019

Confidentiality

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

Name of the periodical

Freshwater Biology

ISSN

0046-5070

e-ISSN

—

Volume of the periodical

64

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

1984-1993

UT code for WoS article

000490904700008

EID of the result in the Scopus database

2-s2.0-85070740651