The relative importance of diet-related and waterborne effects of copper for a leaf-shredding invertebrate

Zubrod, Jochen P.; Englert, Dominic; Rosenfeldt, Ricki R.; Wolfram, Jakob; Lüderwald, Simon; Wallace, Dirk; Schnetzer, N.; Schulz, Ralf; Bundschuh, Mirco

doi:10.1016/j.envpol.2015.05.015

Cited by 24 publications

(18 citation statements)

References 44 publications

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“…Contaminants may also lead to increased biomass of some microbes, toward species that are more palatable to macroinvertebrate detritivores, which therefore decompose less leaf litter to obtain enough nutrients to sustain growth (Zubrod et al, 2015a). However, because we found a marginally significant increase in litter decomposition in response to antihistamine exposure, the above does not seem like a suitable explanation to our results.…”

Section: Discussioncontrasting

confidence: 75%

Effects of an antihistamine on carbon and nutrient recycling in streams

Jonsson

Ershammar

Fick

et al. 2015

Science of The Total Environment

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Section: Discussioncontrasting

confidence: 75%

Effects of an antihistamine on carbon and nutrient recycling in streams

Jonsson

Ershammar

Fick

et al. 2015

Science of The Total Environment

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“…To this end, leaf material was exposed to fungicides for up to 54 d, and microbial decomposition, fungal growth, and bacterial density were monitored. Further, we anticipated that the combined action of waterborne toxicity and diet-related effects of fungicides would affect the structure, fitness, and functioning of Gammarus populations [13,18], and effects were assumed to exacerbate over the course of the experiment. Population structure and fitness (abundance, biomass, lipid content, fatty acid composition, pairing, and juvenile production) as well as functioning (leaf breakdown, FPOM production, and respiration) were monitored as response variables.…”

Section: Introductionmentioning

confidence: 99%

Long‐term effects of fungicides on leaf‐associated microorganisms and shredder populations—an artificial stream study

Zubrod

Englert

Wolfram

et al. 2017

Enviro Toxic and Chemistry

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Leaf litter is a major source of carbon and energy for stream food webs, while both leaf-decomposing microorganisms and macroinvertebrate leaf shredders can be affected by fungicides. Despite the potential for season-long fungicide exposure for these organisms, however, such chronic exposures have not yet been considered. Using an artificial stream facility, effects of a chronic (lasting up to 8 wk) exposure to a mixture of 5 fungicides (sum concentration 20 μg/L) on leaf-associated microorganisms and the key leaf shredder Gammarus fossarum were therefore assessed. While bacterial density and microorganism-mediated leaf decomposition remained unaltered, fungicide exposure reduced fungal biomass (≤71%) on leaves from day 28 onward. Gammarids responded to the combined stress from consumption of fungicide-affected leaves and waterborne exposure with a reduced abundance (≤18%), which triggered reductions in final population biomass (18%) and in the number of precopula pairs (≤22%) but could not fully explain the decreased leaf consumption (19%), lipid content (≤43%; going along with an altered composition of fatty acids), and juvenile production (35%). In contrast, fine particulate organic matter production and stream respiration were unaffected. Our results imply that long-term exposure of leaf-associated fungi and shredders toward fungicides may result in detrimental implications in stream food webs and impairments of detrital material fluxes. These findings render it important to understand decomposer communities' long-term adaptational capabilities to ensure that functional integrity is safeguarded. Environ Toxicol Chem 2017;36:2178-2189. © 2017 SETAC.

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“…Thus leaf‐shredders were affected by fungicides either via their food (indirect pathway), or over the water phase (direct pathway), or via both pathways simultaneously (combined scenario). In the present study, we reanalyzed the data from the previous 3 studies (Zubrod et al , ; Feckler et al ) and interpreted the importance of the different effect pathways and their combination on leaf‐shredders’ food processing (consumption and excretion), growth, and lipid content using null hypothesis significance testing, effect sizes (with their respective 95% CIs), and a Bayesian approach. All analyses were accomplished using the open source statistical software R (version 3.0.2 for Mac OS X, 10.9; R Development Core Team ) supplemented by the required add‐on packages.…”

Section: Methodsmentioning

confidence: 99%

When significance becomes insignificant: Effect sizes and their uncertainties in Bayesian and frequentist frameworks as an alternative approach when analyzing ecotoxicological data

Feckler

Low

Zubrod

et al. 2018

Enviro Toxic and Chemistry

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Bayesian methods and frequentist confidence intervals are proposed as an alternative approach in ecotoxicology, emphasizing effect sizes and associated (un)certainties to judge the biological relevance of effects instead of basing decisions on p values. These approaches show advantages over null hypothesis significance testing. In particular, Bayesian methods revealed more potential than frequentist counterparts, as the posterior distribution and its credible intervals can be directly interpreted as the probability of effect sizes. Environ Toxicol Chem 2018;37:1949-1955. © 2018 SETAC.

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The relative importance of diet-related and waterborne effects of copper for a leaf-shredding invertebrate

Cited by 24 publications

References 44 publications

Effects of an antihistamine on carbon and nutrient recycling in streams

Effects of an antihistamine on carbon and nutrient recycling in streams

Long‐term effects of fungicides on leaf‐associated microorganisms and shredder populations—an artificial stream study

When significance becomes insignificant: Effect sizes and their uncertainties in Bayesian and frequentist frameworks as an alternative approach when analyzing ecotoxicological data

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