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Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments
About 5 trillion plastic particles are present in our oceans, from the macro to the micro size. Like any other aquatic particulate, plastics and microplastics can create a micro-environment, within which microbial and chemical conditions differ significantly from the surrounding water. Despite the h...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6168505/ https://www.ncbi.nlm.nih.gov/pubmed/30279474 http://dx.doi.org/10.1038/s41598-018-32805-4 |
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author | Galgani, Luisa Engel, Anja Rossi, Claudio Donati, Alessandro Loiselle, Steven A. |
author_facet | Galgani, Luisa Engel, Anja Rossi, Claudio Donati, Alessandro Loiselle, Steven A. |
author_sort | Galgani, Luisa |
collection | PubMed |
description | About 5 trillion plastic particles are present in our oceans, from the macro to the micro size. Like any other aquatic particulate, plastics and microplastics can create a micro-environment, within which microbial and chemical conditions differ significantly from the surrounding water. Despite the high and increasing abundance of microplastics in the ocean, their influence on the transformation and composition of marine organic matter is largely unknown. Chromophoric dissolved organic matter (CDOM) is the photo-reactive fraction of the marine dissolved organic matter (DOM) pool. Changes in CDOM quality and quantity have impacts on marine microbial dynamics and the underwater light environment. One major source of CDOM is produced by marine bacteria through their alteration of pre-existing DOM substrates. In a series of microcosm experiments in controlled marine conditions, we explored the impact of microplastics on the quality and quantity of microbial CDOM. In the presence of microplastics we observed an increased production of CDOM with changes in its molecular weight, which resulted from either an increased microbial CDOM production or an enhanced transformation of DOM from lower to higher molecular weight CDOM. Our results point to the possibility that marine microplastics act as localized hot spots for microbial activity, with the potential to influence marine carbon dynamics. |
format | Online Article Text |
id | pubmed-6168505 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-61685052018-10-05 Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments Galgani, Luisa Engel, Anja Rossi, Claudio Donati, Alessandro Loiselle, Steven A. Sci Rep Article About 5 trillion plastic particles are present in our oceans, from the macro to the micro size. Like any other aquatic particulate, plastics and microplastics can create a micro-environment, within which microbial and chemical conditions differ significantly from the surrounding water. Despite the high and increasing abundance of microplastics in the ocean, their influence on the transformation and composition of marine organic matter is largely unknown. Chromophoric dissolved organic matter (CDOM) is the photo-reactive fraction of the marine dissolved organic matter (DOM) pool. Changes in CDOM quality and quantity have impacts on marine microbial dynamics and the underwater light environment. One major source of CDOM is produced by marine bacteria through their alteration of pre-existing DOM substrates. In a series of microcosm experiments in controlled marine conditions, we explored the impact of microplastics on the quality and quantity of microbial CDOM. In the presence of microplastics we observed an increased production of CDOM with changes in its molecular weight, which resulted from either an increased microbial CDOM production or an enhanced transformation of DOM from lower to higher molecular weight CDOM. Our results point to the possibility that marine microplastics act as localized hot spots for microbial activity, with the potential to influence marine carbon dynamics. Nature Publishing Group UK 2018-10-02 /pmc/articles/PMC6168505/ /pubmed/30279474 http://dx.doi.org/10.1038/s41598-018-32805-4 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Galgani, Luisa Engel, Anja Rossi, Claudio Donati, Alessandro Loiselle, Steven A. Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments |
title | Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments |
title_full | Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments |
title_fullStr | Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments |
title_full_unstemmed | Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments |
title_short | Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments |
title_sort | polystyrene microplastics increase microbial release of marine chromophoric dissolved organic matter in microcosm experiments |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6168505/ https://www.ncbi.nlm.nih.gov/pubmed/30279474 http://dx.doi.org/10.1038/s41598-018-32805-4 |
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