20260211 10321600 1.0 TRUE 2025-01-15T09:34:24.723163+00:00 Le relevé des macrophytes du Rhône vient compléter les relevés similaires effectués périodiquement dans le lac Léman et permet d'approfondir les connaissances sur la biologie du fleuve.<br /><br />Les macrophytes sont des plantes aquatiques qui constituent d'excellents indicateurs de l'état du milieu et leur présence est indispensable pour de nombreuses espèces animales. 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