Trophic transfer of microplastics in a model freshwater microcosm; lack of a consumer avoidance response

Risk assessment, geochemical speciation, and source apportionment of heavy metals in sediments of an urban river draining into a coastal wetland

“…8). The trophic transfer of MPs from aquatic plants to freshwater invertebrates as part of the feeding process has already been demonstrated in a very different setting (Mateos-Cardenas et al, 2022).…”

Microplastic burden in invasive signal crayfish (Pacifastacus leniusculus) increases along a stream urbanization gradient

“…Ontogenetic diet shifts in crayfish are observed with smaller crayfish more heavily relying on invertebrates, while larger crayfish consume greater amounts of detritus and plant material (Scalici & Gibertini, 2007). Evidence within the freshwater literature of increased microplastic concentrations with increased trophic levels supports this hypothesis (Mateos-Cárdenas et al, 2022).…”

Resilient Amphipods: Gammarid Predatory Behaviour is Unaffected by Microplastic Exposure and Deoxygenation

“…These same microplastics have been used previously to study the effects of microplastic exposure on an invertebrate species (Cunningham et al, 2021). Polyethylene powder has also been used as a proxy for environmental microplastics in recent literature (Mateos-Cárdenas et al, 2022Mbedzi et al, 2020). The low concentration (200 mp/L), although high for current environmental levels (Burns and Boxall, 2018), could represent acute 'shock' occurrences of such stressors in pollution-heavy riverine environments.…”

“…Experimental concentrations were achieved by pipetting 50 μm of either high or low concentration stock solution, resulting in a final concentration of <0.0005 % surfactant. Tween 20 has been used previously in Gammarus exposure experiments (Mateos-Cárdenas et al, 2022) and is not known to have any negative effects at this concentration. Nevertheless, surfactant controls were included in this experiment to ensure methodological rigor.…”