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Evidence of coupled autotrophy and heterotrophy on plastic biofilms and its influence on surrounding seawater.
Conan, Pascal; Philip, Léna; Ortega-Retuerta, Eva; Odobel, Charlène; Duran, Clélia; Pandin, Caroline; Giraud, Carolane; Meistertzheim, Anne-Leila; Barbe, Valérie; Ter Hall, Alexandra; Pujo-Pay, Mireille; Ghiglione, Jean-François.
Affiliation
  • Conan P; Sorbonne Université, CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, France; Sorbonne Université, CNRS OSU STAMAR - UAR2017, 4 Place Jussieu, 75252, Paris cedex 05, France. Electronic address: pascal.conan@obs-banyuls.fr.
  • Philip L; Sorbonne Université, CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, France; SAS Plastic@Sea, Sorbonne Université (UPMC), CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, Fran
  • Ortega-Retuerta E; Sorbonne Université, CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, France.
  • Odobel C; Sorbonne Université, CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, France.
  • Duran C; Sorbonne Université, CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, France.
  • Pandin C; Sorbonne Université, CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, France.
  • Giraud C; Sorbonne Université, CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, France; CNRS, UMR 9220 ENTROPIE, Ifremer (LEAD-NC), IRD, Univ Nouvelle-Calédonie, Univ La Réunion, Nouméa, New Caledonia.
  • Meistertzheim AL; SAS Plastic@Sea, Sorbonne Université (UPMC), CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, France.
  • Barbe V; Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, 91057, Evry, France.
  • Ter Hall A; CNRS, Université de Toulouse, Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique (IMRCP), UMR, 5623, Toulouse, France.
  • Pujo-Pay M; Sorbonne Université, CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, France.
  • Ghiglione JF; Sorbonne Université, CNRS LOMIC - UMR 7621, Laboratoire d'Océanographie Microbienne, 1 Avenue Pierre Fabre, 66650, Banyuls sur Mer, France.
Environ Pollut ; 315: 120463, 2022 Dec 15.
Article de En | MEDLINE | ID: mdl-36272613
ABSTRACT
We measured phytoplankton primary production and heterotrophic bacterial activities on microplastics and seawater in the Northwestern Mediterranean Sea during two 3-month spring periods over 2 consecutive years. Microorganisms growing on a 5 mm diameter low density polyethylene films (LDPE; 200 µm thick) faced two contrasting conditions depending on the year. Spring 2018 was characterized by consistent nutrient inputs and bloom development. In spring 2019, nutrient inputs and bloom were low. For the first time, we observed a clear coupling between primary production and heterotrophic prokaryote production on microplastics during both years, but with different intensity between years that reflected the crucial role of the trophic environmental conditions (nutrient supply) in shaping microbial activities on plastics. We found that high primary production on plastics could support the whole (net autotrophy) or the majority of the bacterial carbon demand needed for heterotrophic activities, supplemented by other carbon sources if surrounding waters are highly productive. We propose that microbial activity on plastics influences the microbial community in the surrounding seawater, especially when the environmental conditions are less favorable. An illustrative image of the role of plastics in the environment could be that of an inverter in an electrical circuit that mitigates both positive and negative variations. Our results highlight the potential role of the plastisphere in shaping biogeochemical cycles in the context of increasing amounts of plastic particles in the marine environment.
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Texte intégral: 1 Collection: 01-internacional Base de données: MEDLINE Sujet principal: Matières plastiques / Microplastiques Langue: En Journal: Environ Pollut Sujet du journal: SAUDE AMBIENTAL Année: 2022 Type de document: Article

Texte intégral: 1 Collection: 01-internacional Base de données: MEDLINE Sujet principal: Matières plastiques / Microplastiques Langue: En Journal: Environ Pollut Sujet du journal: SAUDE AMBIENTAL Année: 2022 Type de document: Article
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