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title Combined effects of predation risk and food quality on freshwater detritivore insects
authors Bordalo, MD; Vieira, HC; Rodrigues, ACM; Rosa, R; Soares, AMVM; Pestana, JLT
author full name Bordalo, Maria D.; Vieira, Hugo C.; Rodrigues, Andreia C. M.; Rosa, Rita; Soares, Amadeu M. V. M.; Pestana, Joao L. T.
title Combined effects of predation risk and food quality on freshwater detritivore insects
nationality internacional
language English
document type Article
author keywords leaf decomposition; predator cues; resource quality; shredder-collector interactions; stream ecosystems
abstract Because both predation risk and resource quality have a pivotal role in ecological communities, their combined effects were assessed in stream detritivores. Bioassays were conducted using a simplified trophic chain, coupling effects of predation risk and basal resources with different nutritious qualities, namely, a predator planarian Dugesia subtentaculata, a caddisfly shredder Sericostoma vittatum, a dipteran collector Chironomus riparius, native alder Alnus glutinosa and invasive eucalypt Eucalyptus globulus. We investigated whether individual performance of C. riparius larvae is affected under predation risk and whether the response can be mediated by resource quality. We also assessed whether shredder-collector interactions are altered under these conditions. Predation risk and food quality influenced leaf decomposition and C. riparius growth independently. Chironomus riparius fed preferentially on alders, resulting in increased growth rate. Litter processing decreased under planarian presence, in both leaf types, impairing the growth of C. riparius larvae, this effect being exacerbated with eucalypts. Chironomus riparius growth was also reduced in the presence of the caddisfly, suggesting competition between these species, irrespective of planarian presence, but dependent on leaf type. The present study highlighted the importance of assessing predator influence along detritus-based processing chains, because predation risk may result in sublethal costs, with potential cascading effects.
author address [Bordalo, Maria D.; Vieira, Hugo C.; Rodrigues, Andreia C. M.; Rosa, Rita; Soares, Amadeu M. V. M.; Pestana, Joao L. T.] Univ Aveiro, Dept Biol, Campus Univ Rio Santiago, PT-3810193 Aveiro, Portugal; [Bordalo, Maria D.; Vieira, Hugo C.; Rodrigues, Andreia C. M.; Rosa, Rita; Soares, Amadeu M. V. M.; Pestana, Joao L. T.] Univ Aveiro, CESAM, Campus Univ Rio Santiago, PT-3810193 Aveiro, Portugal
reprint address Bordalo, MD (reprint author), Univ Aveiro, Dept Biol, Campus Univ Rio Santiago, PT-3810193 Aveiro, Portugal.; Bordalo, MD (reprint author), Univ Aveiro, CESAM, Campus Univ Rio Santiago, PT-3810193 Aveiro, Portugal.
e-mail address maria.bordalo@ua.pt
researcherid number Soares, Amadeu/A-8304-2008
orcid number Soares, Amadeu/0000-0003-0879-9470; Bordalo, Maria/0000-0002-8781-3666; Rodrigues, Andreia/0000-0001-9839-6290
funding agency and grant number Portuguese Science Foundation (FCT) [CESAM: UID/AMB/50017/2013]; COMPETE program (Programa Operacional Fatores de Competitividade, FEDER component); FCT [FCOMP-01-0124-FEDER-019380, FCT: PTDC/AAC-AMB/119433/2010]; POPH/ FSE (Programa Operacional Potencial Humano/Fundo Social Europeu) [SFRH/BPD/94494/2013, SFRH/BPD/103897/2014, SFRH/BD/79424/2011, PD/BD/127808/2016]
funding text This study was funded by the Portuguese Science Foundation (FCT) through CESAM: UID/AMB/50017/2013. This work was also funded by COMPETE program (Programa Operacional Fatores de Competitividade, FEDER component) and by National funding through FCT within the research project IDEAL ('Insecticides, detritivores and aliens: combined effects of invasive species and insecticides along detritus based stream food webs'), ref: FCOMP-01-0124-FEDER-019380 (Ref. FCT: PTDC/AAC-AMB/119433/2010), FCT and POPH/ FSE (Programa Operacional Potencial Humano/Fundo Social Europeu) for the post-doctoral fellowships of M. D. Bordalo (SFRH/BPD/94494/2013) and J. L. T. Pestana (SFRH/BPD/103897/2014) and the doctoral grant of A. C. M. Rodrigues (SFRH/BD/79424/2011) and H. C. Vieira (PD/BD/127808/2016). All experiments were conducted in accordance with the ethical guidelines of the European Union Council (Directive 2010/63/EU) for the protection of animals used for experimental and other scientific purposes.
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cited reference count 69
publisher city CLAYTON
issn 1323-1650
29-character source abbreviation MAR FRESHWATER RES
iso source abbreviation Mar. Freshw. Res.
year published 2018
volume 69
issue 1
beginning page 74
ending page 81
digital object identifier (doi) 10.1071/MF17086
subject category 8
document delivery number Fisheries; Limnology; Marine & Freshwater Biology; Oceanography
unique article identifier Fisheries; Marine & Freshwater Biology; Oceanography
link https://doi.org/10.1071/MF17086