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Open AccessArticle

Use of the Zebra Mussel Dreissena polymorpha (Mollusca, Bivalvia) as a Bioindicator of Microplastics Pollution in Freshwater Ecosystems: A Case Study from Lake Iseo (North Italy)

1
The Veterinary Medical Research Institute for Piemonte, Liguria and Valle d’Aosta, via Bologna 148, 10154 Torino, Italy
2
Bioscience Research Center, via Aurelia Vecchia 32, 58015 Orbetello, Italy
3
Department of Life Sciences, University of Trieste, via L. Giorgieri 10, 34127 Trieste, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Hrissi K. Karapanagioti
Water 2021, 13(4), 434; https://doi.org/10.3390/w13040434
Received: 19 January 2021 / Revised: 2 February 2021 / Accepted: 4 February 2021 / Published: 7 February 2021
(This article belongs to the Special Issue Microplastics in Water Bodies and in the Environment)
The monitoring of microplastics pollution in freshwater environments trails behind its practice in marine ecosystems. We evaluated the use of the invasive zebra mussel (Dreissena polymorpha) as a potential bioindicator of microplastic litter in freshwater lakes. Samples were collected from three sites (Lovere, Costa Volpino, Castro) at the northern end of Lake Iseo (one of the major subalpine lakes in north Italy) and compared for water physicochemical parameters, biometrical features of zebra mussels, and microplastics items/specimens (color, shape, size, and chemical composition). We hypothesized that since a wastewater treatment plant (WWTP) on the Oglio River discharges into this area of the lake, the microplastics in D.polymorpha could be measured and compared in samples from the three sites at different distances from the WWTP. There was no difference in the physicochemical water parameters and biometric features between the samples from the three sites, whereas there was a significant difference in items/specimen between the sites in decreasing order (mean ± standard deviation): Costa Volpino (0.23 ± 0.43) > Lovere (0.07 ± 0.25) > Castro (0.03 ± 0.18). The chi-square test showed a significant difference in shape, color, and chemical composition frequency in the samples from the three sites. The chemical composition of the microplastics was polyethylene terephthalate (45%), nylon (20%), polypropylene (20%), polyamide resin (10%), and polyvinyl chloride (5%). Our data show that the amount of microplastics the zebra mussel accumulated was greater the closer the sampling site to the WWTP. Our findings suggest that the zebra mussel may provide a useful tool to monitor microplastics pollution in lakes. View Full-Text
Keywords: environmental monitoring; freshwater ecosystems; polyethylene terephthalate; nylon; wastewater treatment plant environmental monitoring; freshwater ecosystems; polyethylene terephthalate; nylon; wastewater treatment plant
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MDPI and ACS Style

Pastorino, P.; Prearo, M.; Anselmi, S.; Menconi, V.; Bertoli, M.; Dondo, A.; Pizzul, E.; Renzi, M. Use of the Zebra Mussel Dreissena polymorpha (Mollusca, Bivalvia) as a Bioindicator of Microplastics Pollution in Freshwater Ecosystems: A Case Study from Lake Iseo (North Italy). Water 2021, 13, 434. https://doi.org/10.3390/w13040434

AMA Style

Pastorino P, Prearo M, Anselmi S, Menconi V, Bertoli M, Dondo A, Pizzul E, Renzi M. Use of the Zebra Mussel Dreissena polymorpha (Mollusca, Bivalvia) as a Bioindicator of Microplastics Pollution in Freshwater Ecosystems: A Case Study from Lake Iseo (North Italy). Water. 2021; 13(4):434. https://doi.org/10.3390/w13040434

Chicago/Turabian Style

Pastorino, Paolo; Prearo, Marino; Anselmi, Serena; Menconi, Vasco; Bertoli, Marco; Dondo, Alessandro; Pizzul, Elisabetta; Renzi, Monia. 2021. "Use of the Zebra Mussel Dreissena polymorpha (Mollusca, Bivalvia) as a Bioindicator of Microplastics Pollution in Freshwater Ecosystems: A Case Study from Lake Iseo (North Italy)" Water 13, no. 4: 434. https://doi.org/10.3390/w13040434

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