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Characterization and Assessment of Micro and Macroscopic Litter in Sardinian Beaches (Western Mediterranean Sea)

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Abstract

The presence of beach litter along the coast is due to the indirect input by waves, wind, rivers and currents and to the direct deposition by beach users. This study, conducted in Sardinia (Western Mediterranean Sea), aims to quantify and characterize beach litter all around the island and to suggest the main sources of impact. Five monitoring campaigns (autumn 2013; spring 2014; autumn 2015; spring 2016; autumn 2016) were conducted considering 3 “exposed” and 4 “sheltered” beaches by means of 33.3-m linear transects in which all “macroscopic” items (> 5 mm) were collected. “Micro” litter (< 5 mm) sampling was performed in 6 beaches through 10-m linear transects. For both sampling designs, abundance and litter typologies were assessed following the protocols of the Marine Strategy Framework Directive (MSFD) and BASEMAN project. Repeated measures permutational analysis of variance was performed to detect any difference in abundance and composition of marine litter according to season, wind exposure and site. Exposure was the factor that better explains the distribution of litter: higher values were found on the “exposed” (E) sites with respect to the “sheltered” (S) ones, both for macroscopic (E: 1696.56 ± 219.25 items/100 m; S: 420.5 ± 74.73 items/100 m) and micro litter (E: 7990.67 ± 2319.44 items/10 m; S: 111.78 ± 25.91 items/10 m). All the 8 typologies were recorded, and litter composition significantly varied according to exposure and site over time. This work provides key information about litter presence and sources, useful to suggest possible mitigation measures.

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Acknowledgements

The authors gratefully acknowledge the Italian Environmental Ministry and Sardinian Regional Body (ARPAS—Agenzia Regionale per la Protezione Ambientale in Sardegna and Sardegna Ricerche) that financed this activity. We are grateful to the citizens, fishermen and politicians that have participated to beach cleaning events. We are particularly grateful to Marco Coa S.E. for his valuable advices during the building of this work.

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All the authors contributed to the performing of field monitoring, lab analysis of sampled marine litter and the general revision of the paper; in particular, Andrea Camedda has written the paper and performed field work; Stefania Coppa has processed data for analysis and performed field work; Stefano Marra and Giorgio Massaro have supported the graphical drawing and performed laboratory work; Fabrizio Serrentino, Sara Vencato, Luca Palazzo and Roberto Brundu have mainly contributed to the sampling activity in field and in lab; and G. Andrea de Lucia has coordinated the whole scientific activity, including the experimental design and field work.

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Correspondence to Andrea Camedda.

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The authors declare that they have no conflict of interest.

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Camedda, A., Coppa, S., Palazzo, L. et al. Characterization and Assessment of Micro and Macroscopic Litter in Sardinian Beaches (Western Mediterranean Sea). Water Air Soil Pollut 232, 41 (2021). https://doi.org/10.1007/s11270-021-04993-9

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  • DOI: https://doi.org/10.1007/s11270-021-04993-9

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