Journal
ECOTOXICOLOGY
Volume 27, Issue 7, Pages 794-802Publisher
SPRINGER
DOI: 10.1007/s10646-017-1887-z
Keywords
Detritivore invertebrates; Chlorantraniliprole; Predation risk; Leaf decomposition
Categories
Funding
- Portuguese Science Foundation (FCT) [CESAM: UID/AMB/50017/2013]
- COMPETE program (Programa Operacional Fatores de Competitividade, FEDER component)
- FCT-Fundacao para a Ciencia e Tecnologia within the research project IDEAL-Insecticides, DEtritivores and ALiens: Combined effects of invasive species and insecticides along detritus based stream food webs [FCOMP-01-0124-FEDER-019380, FCT: PTDC/AAC-AMB/119433/2010]
- FCT [IF/01420/2015]
- POPH/FSE (Programa Operacional Potencial Humano/Fundo Social Europeu) [IF/01420/2015]
- Andreia C. M. Rodrigues doctoral grant [SFRH/BD/79424/2011]
- Ministry of Education, Youth and Sports of the Czech Republic through project CENAKVA [CZ.1.05/2.1.00/01.0024]
- Ministry of Education, Youth and Sports of the Czech Republic through project CENAKVA II [LO1205]
- Grant Agency of the University of South Bohemia in Ceske Budejovice [012/2016/Z]
- Czech Science Foundation [16-06498 S]
- [SFRH/BPD/94494/2013]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/79424/2011] Funding Source: FCT
Ask authors/readers for more resources
Insecticides usually present in low concentrations in streams are known to impair behaviour and development of non-target freshwater invertebrates. Moreover, there is growing awareness that the presence of natural stressors, such as predation risk may magnify the negative effects of pesticides. This is because perception of predation risk can by itself lead to changes on behaviour and physiology of prey species. To evaluate the potential combined effects of both stressors on freshwater detritivores we studied the behavioural and developmental responses of Chironomus riparius to chlorantraniliprole (CAP) exposure under predation risk. Also, we tested whether the presence of a shredder species would alter collector responses under stress. Trials were conducted using a simplified trophic chain: Alnus glutinosa leaves as food resource, the shredder Sericostoma vittatum and the collector C. riparius. CAP toxicity was thus tested under two conditions, presence/absence of the dragonfly predator Cordulegaster boltonii. CAP exposure decreased leaf decomposition. Despite the lack of significance for interactive effects, predation risk marginally modified shredder effect on leaf decomposition, decreasing this ecosystem process. Shredders presence increased leaf decomposition, but impaired chironomids performance, suggesting interspecific competition rather than facilitation. C. riparius growth rate was decreased independently by CAP exposure, presence of predator and shredder species. A marginal interaction between CAP and predation risk was observed regarding chironomids development. To better understand the effects of chemical pollution to natural freshwater populations, natural stressors and species interactions must be taken into consideration, since both vertical and horizontal species interactions play their role on response to stress.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available