{"id":64277,"date":"2026-04-23T12:17:52","date_gmt":"2026-04-23T10:17:52","guid":{"rendered":"https:\/\/interreg-sudoe.eu\/?post_type=noticia-proyecto&#038;p=64277"},"modified":"2026-04-24T12:40:58","modified_gmt":"2026-04-24T10:40:58","slug":"aguieira-alerta-para-um-aumento-continuo-de-cianobacterias-toxicas-e-um-risco-ecologico-crescente","status":"publish","type":"noticia-proyecto","link":"https:\/\/interreg-sudoe.eu\/fr\/noticia-proyecto\/aguieira-alerta-para-um-aumento-continuo-de-cianobacterias-toxicas-e-um-risco-ecologico-crescente\/","title":{"rendered":"Aguieira alerta para um aumento cont\u00ednuo de cianobact\u00e9rias t\u00f3xicas e um risco ecol\u00f3gico crescente"},"content":{"rendered":"<p>Le <strong>r\u00e9servoir d&rsquo;Aguieira<\/strong>, l&rsquo;un des \u00e9cosyst\u00e8mes aquatiques les plus importants du centre du Portugal, tant pour son r\u00f4le \u00e9nerg\u00e9tique que pour son importance environnementale et r\u00e9cr\u00e9ative, se trouve confront\u00e9 \u00e0 une situation pr\u00e9occupante apr\u00e8s des d\u00e9cennies de pr\u00e9sence de cyanobact\u00e9ries potentiellement toxiques. Les analyses effectu\u00e9es depuis 1989 r\u00e9v\u00e8lent des taux \u00e9lev\u00e9s et persistants de chlorophylle a, ainsi que la pr\u00e9sence r\u00e9currente d&rsquo;esp\u00e8ces productrices de toxines.<\/p>\n<p>Ces derni\u00e8res ann\u00e9es, <strong>des esp\u00e8ces telles que Microcystis aeruginosa, Aphanizomenon flos-aquae et Anabaena flos-aquae ont \u00e9t\u00e9 d\u00e9tect\u00e9es<\/strong> pendant les mois d&rsquo;\u00e9t\u00e9 et d&rsquo;automne, co\u00efncidant avec les conditions les plus favorables \u00e0 leur prolif\u00e9ration. Certains \u00e9pisodes ont largement d\u00e9pass\u00e9 les valeurs de r\u00e9f\u00e9rence de risque \u00e9tablies par l&rsquo;OMS, et les \u00e9tudes les plus r\u00e9centes confirment que certaines souches pr\u00e9sentes dans le r\u00e9servoir contiennent des g\u00e8nes associ\u00e9s \u00e0 la production de microcystines.<\/p>\n<p>L&rsquo;augmentation de la concentration en nutriments dans l&rsquo;eau, notamment en phosphore et en azote, li\u00e9e aux pratiques agricoles et aux effluents urbains, appara\u00eet comme l&rsquo;un des facteurs les plus d\u00e9terminants. De m\u00eame, les pluies intenses, les s\u00e9cheresses prolong\u00e9es et la hausse des temp\u00e9ratures cr\u00e9ent des conditions propices \u00e0 des cycles r\u00e9p\u00e9t\u00e9s de prolif\u00e9ration.<\/p>\n<p>Les cons\u00e9quences \u00e9cologiques et sociales se font d\u00e9j\u00e0 sentir. En 2024, la baignade a \u00e9t\u00e9 d\u00e9conseill\u00e9e sur plusieurs plages fluviales du r\u00e9servoir, et <strong>les experts avertissent que la situation pourrait s&rsquo;aggraver si des strat\u00e9gies de surveillance continue et de r\u00e9duction des apports de polluants ne sont pas mises en place.<\/strong><\/p>\n<p>Le r\u00e9servoir d&rsquo;Aguieira est devenu un exemple flagrant de la mani\u00e8re dont la pression humaine et le changement climatique red\u00e9finissent le fonctionnement des \u00e9cosyst\u00e8mes aquatiques portugais et souligne l&rsquo;urgence de passer \u00e0 des mod\u00e8les de gestion de l&rsquo;eau plus durables.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le r\u00e9servoir d&rsquo;Aguieira, l&rsquo;un des \u00e9cosyst\u00e8mes aquatiques les plus importants du centre du Portugal, tant pour son r\u00f4le \u00e9nerg\u00e9tique que pour son importance environnementale et r\u00e9cr\u00e9ative, se trouve confront\u00e9 \u00e0 une situation pr\u00e9occupante apr\u00e8s des d\u00e9cennies de pr\u00e9sence de cyanobact\u00e9ries potentiellement toxiques. Les analyses effectu\u00e9es depuis 1989 r\u00e9v\u00e8lent des taux \u00e9lev\u00e9s et persistants de chlorophylle [&hellip;]<\/p>\n","protected":false},"author":6548,"featured_media":64379,"parent":0,"template":"","meta":{"_acf_changed":false,"content-type":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"class_list":["post-64277","noticia-proyecto","type-noticia-proyecto","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aguieira alerta para um aumento cont\u00ednuo de cianobact\u00e9rias t\u00f3xicas e um risco ecol\u00f3gico crescente - Interreg Sudoe<\/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:\/\/interreg-sudoe.eu\/fr\/noticia-proyecto\/aguieira-alerta-para-um-aumento-continuo-de-cianobacterias-toxicas-e-um-risco-ecologico-crescente\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aguieira alerta para um aumento cont\u00ednuo de cianobact\u00e9rias t\u00f3xicas e um risco ecol\u00f3gico crescente - Interreg Sudoe\" \/>\n<meta property=\"og:description\" content=\"Le r\u00e9servoir d&rsquo;Aguieira, l&rsquo;un des \u00e9cosyst\u00e8mes aquatiques les plus importants du centre du Portugal, tant pour son r\u00f4le \u00e9nerg\u00e9tique que pour son importance environnementale et r\u00e9cr\u00e9ative, se trouve confront\u00e9 \u00e0 une situation pr\u00e9occupante apr\u00e8s des d\u00e9cennies de pr\u00e9sence de cyanobact\u00e9ries potentiellement toxiques. Les analyses effectu\u00e9es depuis 1989 r\u00e9v\u00e8lent des taux \u00e9lev\u00e9s et persistants de chlorophylle [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/interreg-sudoe.eu\/fr\/noticia-proyecto\/aguieira-alerta-para-um-aumento-continuo-de-cianobacterias-toxicas-e-um-risco-ecologico-crescente\/\" \/>\n<meta property=\"og:site_name\" content=\"Interreg Sudoe\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/interregsudoe\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-24T10:40:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/interreg-sudoe.eu\/wp-content\/uploads\/2026\/04\/Aguieira-foto-noticia-FR.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"720\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@Sudoe5\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/interreg-sudoe.eu\/fr\/noticia-proyecto\/aguieira-alerta-para-um-aumento-continuo-de-cianobacterias-toxicas-e-um-risco-ecologico-crescente\/\",\"url\":\"https:\/\/interreg-sudoe.eu\/fr\/noticia-proyecto\/aguieira-alerta-para-um-aumento-continuo-de-cianobacterias-toxicas-e-um-risco-ecologico-crescente\/\",\"name\":\"Aguieira alerta para um aumento cont\u00ednuo de cianobact\u00e9rias t\u00f3xicas e um risco ecol\u00f3gico crescente - 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