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Independence of microplastic ingestion from environmental load in the round goby (Neogobius melanostomus) from the Rhine river using high quality standards

Bosshart, Sophie and Erni-Cassola, Gabriel and Burkhardt-Holm, Patricia. (2020) Independence of microplastic ingestion from environmental load in the round goby (Neogobius melanostomus) from the Rhine river using high quality standards. Environmental Pollution, 267. p. 115664.

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Official URL: https://edoc.unibas.ch/80999/

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Abstract

Rivers play a crucial role in collecting and transporting microplastics. Nonetheless, the degree to which microplastic pollution of freshwaters affects its biota remains understudied. Sampling of wild fishes has so far demonstrated that microplastic ingestion occurs commonly across species with alternate feeding modes, as well as in different environmental compartments. Due to the exploratory nature of many preceding studies, drawing insight about factors driving microplastic ingestion has remained difficult. It continues unknown for instance, what the importance of varying environmental microplastic concentrations is to predict ingestion rates in fish from those areas. Here we show that ingestion rates of microplastic particles (>300 μm) in the benthic round goby from the Rhine river were negligible (1 particle in 417 fish). Among the 535 visually selected putative microplastic fragments, stringent data processing steps to reduce the number of false positives during reference library searches, revealed the importance of taking such steps into account in comparison with other data processing routines. Our observations remained consistent, despite having collected fish from a strongly polluted site of the lower Rhine, which served as contrast to a significantly cleaner site upstream. These results demonstrate that higher environmental microplastic concentrations are not necessarily mirrored by higher ingestion rates in a given fish species.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Aquatische Ökologie (Holm)
UniBasel Contributors:Holm, Patricia and Erni Cassola, Gabriel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0269-7491
e-ISSN:1873-6424
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:13 Apr 2021 13:25
Deposited On:13 Apr 2021 13:25

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