{"id":6227,"date":"2025-02-26T12:00:03","date_gmt":"2025-02-26T11:00:03","guid":{"rendered":"https:\/\/www.assograie.org\/isrivers\/?p=6227"},"modified":"2025-06-23T11:48:43","modified_gmt":"2025-06-23T09:48:43","slug":"session-d7-micro-plastiques-dans-les-rivieres","status":"publish","type":"post","link":"https:\/\/www.assograie.org\/isrivers\/2025\/02\/26\/session-d7-micro-plastiques-dans-les-rivieres\/","title":{"rendered":"Session D7 &#8211; (micro) plastiques dans les rivi\u00e8res"},"content":{"rendered":"\n<p class=\"has-text-color has-link-color wp-elements-9b1ca1ab1685cc23a91d45df491e90f7\" style=\"color:#ed7102;font-size:30px\"><strong>Jeudi 3 juillet \u2013 11h15<\/strong><\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Session pr\u00e9sid\u00e9e par Laurent Simon<\/strong><\/p>\n\n\n<style>.kb-table-of-content-nav.kb-table-of-content-id6227_e2ee79-f2 .kb-table-of-content-wrap{padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-right:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);padding-left:var(--global-kb-spacing-sm, 1.5rem);}.kb-table-of-content-nav.kb-table-of-content-id6227_e2ee79-f2 .kb-table-of-contents-title-wrap{padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.kb-table-of-content-nav.kb-table-of-content-id6227_e2ee79-f2 .kb-table-of-contents-title{font-weight:regular;font-style:normal;}.kb-table-of-content-nav.kb-table-of-content-id6227_e2ee79-f2 .kb-table-of-content-wrap .kb-table-of-content-list{font-weight:regular;font-style:normal;margin-top:var(--global-kb-spacing-sm, 1.5rem);margin-right:0px;margin-bottom:0px;margin-left:0px;}<\/style>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"has-medium-font-size\"><strong>11:15<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color wp-elements-cf176da20ec1b4e545b13be5bbe45fa8\" style=\"color:#ee7203\"><strong>Comparaison de m\u00e9thodologies pour l\u2019\u00e9valuation des microplastiques dans les rivi\u00e8res : application sur le continuum du Rh\u00f4ne<\/strong><\/h3>\n\n\n\n<p><strong>AUTEURS<\/strong><\/p>\n\n\n\n<h6 class=\"wp-block-heading\">COQUERY Marina, GATEUILLE David, GIRAUD Nathan, LELAY Soline, DARMON Ga\u00eblle, GRUAT Alexandra, RICHARD Lo\u00efc, SABATTE Marie-Aur\u00e9lia, MOURIER Brice<\/h6>\n\n\n\n<p><strong>France<\/strong><\/p>\n\n\n\n<p>R\u00e9sum\u00e9 : A ce jour, il n\u2019existe pas de surveillance p\u00e9renne pour la mesure des concentrations et flux de microplastiques transport\u00e9s par les rivi\u00e8res. Les \u00e9quipes de recherche emploient des m\u00e9thodologies d\u2019\u00e9chantillonnage et\/ou de laboratoires diff\u00e9rentes, rendant ardue la comparaison des r\u00e9sultats et l\u2019\u00e9tablissement de tendances spatiales ou temporelles \u00e0 l\u2019\u00e9chelle d\u2019un grand bassin versant. Le projet MicroPlasticRivers a pour objectif de comparer des m\u00e9thodologies de mesure des concentrations et flux de microplastiques dans les rivi\u00e8res, depuis l\u2019\u00e9chantillonnage jusqu\u2019\u00e0 l\u2019extraction et l\u2019identification en laboratoire, et de proposer des m\u00e9thodologies harmonis\u00e9es. Cette \u00e9tude a \u00e9t\u00e9 r\u00e9alis\u00e9e sur le continuum du Rh\u00f4ne et ses affluents, qui b\u00e9n\u00e9ficie d\u2019un r\u00e9seau de stations de mesure sur le long terme (Observatoire des S\u00e9diments du Rh\u00f4ne &#8211; OSR). Des \u00e9chantillons \u00ab contr\u00f4les \u00bb de mati\u00e8res en suspension (MES) ont \u00e9t\u00e9 pr\u00e9par\u00e9s et partag\u00e9s entre laboratoires afin d\u2019\u00e9valuer les m\u00e9thodes de pr\u00e9paration et d\u2019analyse (\u00b5FTIR) et de comparer les r\u00e9sultats en termes de d\u00e9tection et de caract\u00e9risation des microplastiques. Plusieurs m\u00e9thodologies de pr\u00e9l\u00e8vement des eaux de surface (filets, pompage, centrifugeuse en continu, pi\u00e8ge \u00e0 particules) ont \u00e9t\u00e9 mises en \u0153uvre simultan\u00e9ment sur plusieurs stations dans des conditions hydrologiques contrast\u00e9es. Les r\u00e9sultats obtenus permettent d\u2019\u00e9valuer les facteurs m\u00e9thodologiques et environnementaux susceptibles d\u2019expliquer la variabilit\u00e9 des concentrations observ\u00e9es.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.assograie.org\/isrivers\/wp-content\/uploads\/2025\/06\/D7-ISR25-269-Coquery-Marina.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">R\u00e9sum\u00e9<\/a><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"has-medium-font-size\"><strong>11:35<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color wp-elements-b2b66f354b563d4cfd2700dad43ec089\" style=\"color:#ee7203\"><strong>Encore des emb\u00e2cles en bois ou d\u00e9j\u00e0 des emb\u00e2cles en bois-plastique? \u00c9valuation sur le terrain des accumulations de bois pollu\u00e9es par le plastique dans les rivi\u00e8res<\/strong><\/h3>\n\n\n\n<p><strong>AUTEURS<\/strong><\/p>\n\n\n\n<h6 class=\"wp-block-heading\">MIKU\u015a Pawe\u0142, LIRO Maciej, ZIELONKA Anna, ZAWIEJSKA Joanna, HAJDUKIEWICZ Hanna<\/h6>\n\n\n\n<p><strong>Pologne<\/strong><\/p>\n\n\n\n<p>R\u00e9sum\u00e9 : La pollution croissante des rivi\u00e8res par les macroplastiques exige une meilleure compr\u00e9hension des m\u00e9canismes \u00e0 l\u2019origine des zones d\u2019accumulation dans les syst\u00e8mes fluviaux. Ces connaissances sont essentielles pour \u00e9valuer les risques environnementaux et organiser efficacement le nettoyage des cours d\u2019eau. Une d\u00e9couverte cl\u00e9 indique que les emb\u00e2cles en bois, compos\u00e9s de morceaux de bois et de s\u00e9diments, retiennent efficacement les macroplastiques, contribuant ainsi \u00e0 la formation de ces zones d\u2019accumulation. Cependant, les processus \u00e0 l\u2019origine de ces structures, appel\u00e9es emb\u00e2cles bois-plastique, restent largement m\u00e9connus. Ce cadre conceptuel propose d\u2019explorer plusieurs questions: (i) comment les crues influencent-elles la formation et la remobilisation des emb\u00e2cles bois-plastique? (ii) quels sont leurs sch\u00e9mas de formation dans les rivi\u00e8res aux morphologies vari\u00e9es? (iii) comment ces emb\u00e2cles se comportent-ils dans les syst\u00e8mes fluviaux? (iv) quels risques posent-ils \u00e0 la faune riveraine? En synth\u00e9tisant les recherches existantes, cette approche vise \u00e0 approfondir notre compr\u00e9hension des interactions entre les emb\u00e2cles en bois et les macroplastiques. Elle cherche \u00e0 soutenir une gestion environnementale plus efficace et \u00e0 limiter l\u2019impact de la pollution plastique sur les \u00e9cosyst\u00e8mes fluviaux.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.assograie.org\/isrivers\/wp-content\/uploads\/2025\/06\/D7-ISR25-114-Zawiejska-Joanna.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">R\u00e9sum\u00e9<\/a><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"has-medium-font-size\"><strong>11:55<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color wp-elements-072bed5da784a601108f2f82619b41ff\" style=\"color:#ee7203\"><strong>\u00c9tat des lieux de l\u2019ingestion de microplastiques par les poissons des eaux douces en France m\u00e9tropolitaine<\/strong><\/h3>\n\n\n\n<p><strong>AUTEURS<\/strong><\/p>\n\n\n\n<h6 class=\"wp-block-heading\">SABATTE Marie-Aur\u00e9lia, MIAUD Claude, PEYRON St\u00e9phane, DARMON Ga\u00eblle<\/h6>\n\n\n\n<p><strong>France<\/strong><\/p>\n\n\n\n<p>R\u00e9sum\u00e9 : Les microplastiques constituent une menace pour la faune des rivi\u00e8res. Les poissons d&rsquo;eau douce peuvent constituer des bio-indicateurs de la pollution locale. Cette \u00e9tude men\u00e9e \u00e0 l\u2019\u00e9chelle fran\u00e7aise a \u00e9valu\u00e9 l&rsquo;ingestion de microplastiques par des poissons collect\u00e9s pour la Directive Cadre sur l\u2019Eau, qui ne prend pas encore en consid\u00e9ration les impacts des plastiques en eaux douces. Un protocole standard a \u00e9t\u00e9 d\u00e9velopp\u00e9 pour extraire les microplastiques des syst\u00e8mes digestifs (estomac et intestins) et identifier les types de polym\u00e8res, avec un taux de d\u00e9tection \u00e9lev\u00e9. Les r\u00e9sultats montrent une forte occurrence d&rsquo;ingestion (91,84 % des poissons analys\u00e9s) et une grande quantit\u00e9 de particules ing\u00e9r\u00e9es. Ces premiers r\u00e9sultats sugg\u00e8rent une pollution plastique plus importante que pr\u00e9vu, avec des variations r\u00e9gionales qui seront pr\u00e9cis\u00e9es en analysant plus d\u2019\u00e9chantillons. Cette \u00e9tude vise \u00e0 mieux comprendre les facteurs influen\u00e7ant l&rsquo;ingestion de microplastiques et \u00e0 soutenir le d\u00e9veloppement d\u2019un indicateur de la qualit\u00e9 des eaux douces bas\u00e9 sur l\u2019ingestion de microplastiques.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.assograie.org\/isrivers\/wp-content\/uploads\/2025\/06\/D7-ISR25-195-Sabatte-Marie-Aurelia.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">R\u00e9sum\u00e9<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Auteurs : Marina COQUERY,<br \/>\nJoanna ZAWIEJSKA,<br \/>\nMarie-Aur\u00e9lia SABATTE  <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[220],"tags":[158],"post_folder":[],"class_list":["post-6227","post","type-post","status-publish","format-standard","hentry","category-session-d7","tag-fonctionnement"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Session D7 - (micro) plastiques dans les rivi\u00e8res - I.S.Rivers<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.assograie.org\/isrivers\/2025\/02\/26\/session-d7-micro-plastiques-dans-les-rivieres\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Session D7 - (micro) plastiques dans les rivi\u00e8res - I.S.Rivers\" \/>\n<meta property=\"og:description\" content=\"Auteurs : Marina COQUERY, Joanna ZAWIEJSKA, Marie-Aur\u00e9lia SABATTE\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.assograie.org\/isrivers\/2025\/02\/26\/session-d7-micro-plastiques-dans-les-rivieres\/\" \/>\n<meta property=\"og:site_name\" content=\"I.S.Rivers\" \/>\n<meta property=\"article:published_time\" content=\"2025-02-26T11:00:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-23T09:48:43+00:00\" \/>\n<meta name=\"author\" content=\"Elsa Demarque\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Elsa Demarque\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.assograie.org\/isrivers\/2025\/02\/26\/session-d7-micro-plastiques-dans-les-rivieres\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.assograie.org\/isrivers\/2025\/02\/26\/session-d7-micro-plastiques-dans-les-rivieres\/\"},\"author\":{\"name\":\"Elsa Demarque\",\"@id\":\"https:\/\/www.assograie.org\/isrivers\/#\/schema\/person\/6c24e843d0177748942059700fffd643\"},\"headline\":\"Session D7 &#8211; 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