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Bacterial colonization of microplastics in beaches of Tenerife (Canary Islands, Spain)

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Javier González‐Sálamo, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Javier González‐Sálamo, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Javier González‐Sálamo, Cintia Hernández-Sánchez, Javier González‐Sálamo, Cintia Hernández-Sánchez, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Cintia Hernández-Sánchez, Javier González‐Sálamo, Javier González‐Sálamo, Cintia Hernández-Sánchez, Javier González‐Sálamo, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Javier González‐Sálamo, Javier González‐Sálamo, Cintia Hernández-Sánchez, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Francisco Javier Díaz Peña, Francisco Javier Díaz Peña, Francisco Javier Díaz Peña, Francisco Javier Díaz Peña, Cintia Hernández-Sánchez, Javier Hernández‐Borges Cintia Hernández-Sánchez, Javier Hernández‐Borges Javier Hernández‐Borges Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier Hernández‐Borges Javier González‐Sálamo, Javier Hernández‐Borges Javier González‐Sálamo, Javier Hernández‐Borges Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Javier Hernández‐Borges Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Javier Hernández‐Borges Javier Hernández‐Borges Cintia Hernández-Sánchez, Javier González‐Sálamo, Javier González‐Sálamo, Javier González‐Sálamo, Javier Hernández‐Borges Cintia Hernández-Sánchez, Javier González‐Sálamo, Javier González‐Sálamo, Cintia Hernández-Sánchez, Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Cristobalina Rodríguez‐Alvarez, Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Francisco Javier Díaz Peña, Javier Hernández‐Borges Francisco Javier Díaz Peña, Javier Hernández‐Borges Cristobalina Rodríguez‐Alvarez, Javier Hernández‐Borges Javier Hernández‐Borges Javier González‐Sálamo, Javier González‐Sálamo, Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Javier Hernández‐Borges Cintia Hernández-Sánchez, Javier Hernández‐Borges Javier Hernández‐Borges Javier González‐Sálamo, Javier Hernández‐Borges Cristobalina Rodríguez‐Alvarez, Cristobalina Rodríguez‐Alvarez, Javier Hernández‐Borges Javier Hernández‐Borges Á. Arias, Javier Hernández‐Borges Javier González‐Sálamo, Javier Hernández‐Borges Cintia Hernández-Sánchez, Javier Hernández‐Borges Javier González‐Sálamo, Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Cintia Hernández-Sánchez, Cintia Hernández-Sánchez, Javier Hernández‐Borges Cintia Hernández-Sánchez, Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier González‐Sálamo, Á. Arias, Cintia Hernández-Sánchez, Á. Arias, Á. Arias, Cintia Hernández-Sánchez, Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier Hernández‐Borges Javier González‐Sálamo, Javier Hernández‐Borges Cintia Hernández-Sánchez, Javier Hernández‐Borges

Summary

Researchers analyzed microplastics collected from six beaches on Tenerife, Canary Islands, for fecal indicator organisms and Vibrio spp., finding E. coli in 57% of plastic fragments and 29% of pellets, with intestinal enterococci detected in 86% of fragments and 57% of pellets. All fragments tested positive for Vibrio spp., highlighting microplastics as vectors for potentially pathogenic bacteria and a bathing water quality concern not captured by current EU monitoring frameworks.

Isolated systems like islands, experience important problems related to microplastic debris on their beaches [1,2]. This problem is also increased by the formation of microbial biofilms on the surface of the microplastics present in such aquatic environments, which provides potential facilities for microorganisms to survive in the biofilm. Apart from that, microplastics act as a vehicle for the dispersion of pathogenic organisms around coastal waters, constituting a new route of exposure for humans [3]. Although in Europe, the Bathing Water Directive uses Faecal Indicator Organisms (FIO), such as Escherichia coli and Intestinal enterococci, as key parameters for the monitoring and control of bathing water quality (Directive 2000/7/EC), their presence is not analysed in microplastics deposited on such beaches, despite the fact that they provide a more durable substrate for these and other microorganisms than their natural reservoirs [4]. The objective of this study was to analyze the microbial content (FIO and Vibrio spp) of microplastics (fragments and pellets) collected on six beaches (Almáciga, El Socorro, Las Teresitas, Playa Grande, Puertito de Adeje, La Viuda and Punta del Bocinegro) on Tenerife, Canary Islands (Spain). Results show that Escherichia coli was present in 57.1% of the fragments and 28.5 % of the pellets studied. In the case of Intestinal enterococci, 85.7% of the fragments and 57.1% of the pellets tested positive for this parameter. Finally, 100% of the fragments and 42.8% of the pellets analyzed in the different beaches contained Vibrio spp. Results obtained in this study show that microplastics act as reservoirs of microorganisms that can increase the presence of bacteria that indicate faecal and pathogen contamination in bathing areas. 1 Mar. Pollut. Bull., 2019, 146, 26–32. 2 Mar. Pollut. Bull., 2020, 151, 110847. 3 Trends Microbiol., 2021, 29, 107–126. 4 Nat. Rev. Microbiol. 2020, 18, 139–151. Also see: https://micro2022.sciencesconf.org/426620/document

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