{"id":1581,"date":"2024-12-08T15:54:44","date_gmt":"2024-12-08T15:54:44","guid":{"rendered":"https:\/\/normandie.apbg.org\/?p=1581"},"modified":"2026-05-19T15:37:08","modified_gmt":"2026-05-19T15:37:08","slug":"microdiversite-de-leau-douce","status":"publish","type":"post","link":"https:\/\/normandie.apbg.fr\/?p=1581","title":{"rendered":"Microdiversit\u00e9 de l&rsquo;eau douce"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">D\u00e9couvrez les petits organismes des eaux douces gr\u00e2ce \u00e0 un microscope !<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour une s\u00e9ance type, voici ma d\u00e9marche : Je commence par pr\u00e9lever de l&rsquo;eau d&rsquo;une mare \u00e0 l&rsquo;aide d&rsquo;un filet \u00e0 plancton, puis je verse le contenu dans un plateau. Les \u00e9l\u00e8ves r\u00e9cup\u00e8rent ensuite des organismes se trouvant sur les bords du plateau pour les observer au microscope. Selon leurs besoins, ils utilisent soit des gouttes directement d\u00e9pos\u00e9es sur une lame, soit une pr\u00e9paration avec lame et lamelle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vous pouvez \u00e9galement observer au microscope de l&rsquo;eau provenant de flaques, de pots de fleurs, ou encore d&rsquo;autres environnements aquatiques.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour <a href=\"https:\/\/www.youtube.com\/watch?v=OZHpyob64aY\" data-type=\"link\" data-id=\"https:\/\/www.youtube.com\/watch?v=OZHpyob64aY\">rechercher des tardigrades<\/a> :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pr\u00e9levez l&rsquo;\u00e9quivalent de trois cuill\u00e8res \u00e0 soupe de mousse sur un arbre et placez-les dans un bocal.<\/li>\n\n\n\n<li>Tassez l\u00e9g\u00e8rement la mousse et recouvrez-la d&rsquo;eau de pluie ou d&rsquo;eau min\u00e9rale (\u00e9vitez l&rsquo;eau du robinet, souvent chlor\u00e9e).<\/li>\n\n\n\n<li>Patientez 20 minutes pour que les tardigrades se r\u00e9hydratent et soient mobiles<\/li>\n\n\n\n<li>Pressez l\u00e9g\u00e8rement la mousse pour en extraire l&rsquo;eau, que vous versez dans un contenant.<\/li>\n\n\n\n<li>Laissez reposer une minute, puis r\u00e9cup\u00e9rez le fond de l&rsquo;eau \u00e0 l&rsquo;aide d&rsquo;une pipette et versez-le dans une bo\u00eete de P\u00e9tri.<\/li>\n\n\n\n<li>Examinez \u00e0 la loupe binoculaire (grossissement x20) ou au microscope (grossissement x40) pour trouver les tardigrades.<\/li>\n\n\n\n<li>Vous pouvez ensuite l&rsquo;aspirer \u00e0 la micropipette pour l&rsquo;observer au microscope<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Mat\u00e9riel pour la classe<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/nuage03.apps.education.fr\/index.php\/s\/nrNNNqANbyQSRW3\" data-type=\"link\" data-id=\"https:\/\/nuage03.apps.education.fr\/index.php\/s\/nrNNNqANbyQSRW3\">Planches en noir et blanc<\/a> : \u00e0 distribuer aux \u00e9l\u00e8ves pour guider leurs observations.<\/li>\n\n\n\n<li><a href=\"https:\/\/nuage03.apps.education.fr\/index.php\/s\/LwKM39GNKTWYa4K\" data-type=\"link\" data-id=\"https:\/\/nuage03.apps.education.fr\/index.php\/s\/LwKM39GNKTWYa4K\">PDF de synth\u00e8se<\/a> : \u00e0 projeter pour discuter des observations en fin de s\u00e9ance.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Pour en savoir plus et voir les microorganismes en action, visiter les cha\u00eenes youtube des amateurs de microscopie :<br>&#8211; Tardigrades : <a href=\"https:\/\/www.youtube.com\/watch?v=kKVTT7zL7qA\">https:\/\/www.youtube.com\/watch?v=kKVTT7zL7qA<\/a><br>&#8211; Volvox <a href=\"https:\/\/www.youtube.com\/watch?v=v6D9OUoD7E4\">https:\/\/www.youtube.com\/watch?v=v6D9OUoD7E4<\/a><br>&#8211; et tant d&rsquo;autres !<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Je vous souhaite de belles explorations et observations !<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Julien H\u00e9bert<\/p>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/normandie.apbg.org\/files\/2024\/12\/planches_microdiversite_n_b.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Contenu embarqu\u00e9 planches_microdiversite_n_b.\"><\/object><a id=\"wp-block-file--media-b2dc0fe2-ee53-4793-bb97-52c281a3330e\" href=\"https:\/\/normandie.apbg.org\/files\/2024\/12\/planches_microdiversite_n_b.pdf\">planches_microdiversite_n_b<\/a><a href=\"https:\/\/normandie.apbg.org\/files\/2024\/12\/planches_microdiversite_n_b.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-b2dc0fe2-ee53-4793-bb97-52c281a3330e\">T\u00e9l\u00e9charger<\/a><\/div>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/normandie.apbg.org\/files\/2024\/12\/201125_apercu_microbiodiversite_des_eaux_douces_diaporama.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Contenu embarqu\u00e9 201125_apercu_microbiodiversite_des_eaux_douces_diaporama.\"><\/object><a id=\"wp-block-file--media-16568e78-200c-42eb-8b42-51c179f5f4c0\" href=\"https:\/\/normandie.apbg.org\/files\/2024\/12\/201125_apercu_microbiodiversite_des_eaux_douces_diaporama.pdf\">201125_apercu_microbiodiversite_des_eaux_douces_diaporama<\/a><a href=\"https:\/\/normandie.apbg.org\/files\/2024\/12\/201125_apercu_microbiodiversite_des_eaux_douces_diaporama.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-16568e78-200c-42eb-8b42-51c179f5f4c0\">T\u00e9l\u00e9charger<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>D\u00e9couvrez les petits organismes des eaux douces gr\u00e2ce \u00e0 un microscope ! Pour une s\u00e9ance type, voici ma d\u00e9marche :<\/p>\n","protected":false},"author":1,"featured_media":1950,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[6,10],"tags":[],"class_list":["post-1581","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classe","category-sv"],"_links":{"self":[{"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=\/wp\/v2\/posts\/1581","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1581"}],"version-history":[{"count":6,"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=\/wp\/v2\/posts\/1581\/revisions"}],"predecessor-version":[{"id":2122,"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=\/wp\/v2\/posts\/1581\/revisions\/2122"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=\/wp\/v2\/media\/1950"}],"wp:attachment":[{"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/normandie.apbg.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}