Predation risk and habitat complexity modify intermediate predator feeding rates and energetic efficiencies in a tri-trophic sytem

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F19%3A00506454" target="_blank" >RIV/60077344:_____/19:00506454 - isvavai.cz</a>

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/full/10.1111/fwb.13320" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1111/fwb.13320</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/fwb.13320" target="_blank" >10.1111/fwb.13320</a>

Result language

angličtina

Original language name

Predation risk and habitat complexity modify intermediate predator feeding rates and energetic efficiencies in a tri-trophic sytem

Original language description

To understand the effects of environmental changes on ecosystems, it is important to determine the factors and mechanisms influencing the strength of species interactions in food webs. However, joint effects of predation risk and additional environmental factors on species interaction strengths in multitrophic systems remain largely unexplored, leaving a substantial gap in our understanding of the links between local environmental characteristics and food web properties.nWe investigated the effects of habitat complexity and predation risk by top predatory dragonfly larvae (Aeshna cyanea) on feeding and metabolic rates of the larvae of three intermediate predatory odonate species (Libellula quadrimaculata, Sympetrum sanguineum, and Ischnura elegans) preying on cladocerans.nThe effect of predation risk on feeding rates was species specific and differed between the structurally simple and complex habitat. Habitat complexity increased feeding rates but only in the absence of predation risk. Moreover, predation risk signalled by chemical cues increased Sympetrum feeding rates but did not influence the feeding rates of the two other intermediate predators. Metabolic rates varied among the three intermediate predators but were not affected by predation risk.nOur results imply that the effects of habitat complexity and predation risk on trophic interactions are likely to be determined by traits related to foraging and defence of the intermediate predators and their habitat domains. Given that habitat complexity and predation risk can vary substantially across habitats, we conclude that it is important to consider habitat complexity and predation risk to better understand and predict the effects of environmentally driven variations on trophic interaction strength and metabolic rates that underlie the energetic efficiency of individual consumers. This has important implications for population and community dynamics.n

Czech name

—

Czech description

—

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/GA14-29857S" target="_blank" >GA14-29857S: Impact of predation risk and habitat complexity on the dynamics of macroinvertebrate community assembly in freshwater</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

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

8

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

1480-1491

UT code for WoS article

000474661800010

EID of the result in the Scopus database

2-s2.0-85067402324