{"id":5613,"date":"2020-08-26T15:29:56","date_gmt":"2020-08-26T13:29:56","guid":{"rendered":"https:\/\/dev.asleman.org\/?post_type=60_secondes&amp;p=5613"},"modified":"2020-08-26T15:29:56","modified_gmt":"2020-08-26T13:29:56","slug":"n51-les-forets-sous-lacustres","status":"publish","type":"60_secondes","link":"https:\/\/asleman.org\/en\/60_secondes\/n51-les-forets-sous-lacustres\/","title":{"rendered":"No.51: Sublacustrine forests"},"content":{"rendered":"<p>On planet Earth, plants play a very important role in ensuring balance through a well-known phenomenon: \ud835\udc25\ud835\udc1a \ud835\udc29\ud835\udc21\ud835\udc28\ud835\udc2d\ud835\udc28\ud835\udc2c\ud835\udc32\ud835\udc27\ud835\udc2d\ud835\udc21\ud835\udc1e\u0300\ud835\udc2c\ud835\udc1e. This is the process by which plants transform carbon dioxide, present in the air, into oxygen, through the action of \ud835\udc25\ud835\udc2e\ud835\udc26\ud835\udc22\ud835\udc1e\u0300\ud835\udc2b\ud835\udc1e \ud835\udc2c\ud835\udc28\ud835\udc25\ud835\udc1a\ud835\udc22\ud835\udc2b\ud835\udc1e. This process not only allows them to grow, but also ensures oxygen availability for \ud835\udc2d\ud835\udc28\ud835\udc2e\ud835\udc2d\ud835\udc1e\ud835\udc2c \ud835\udc25\ud835\udc1e\ud835\udc2c \ud835\udc1e\ud835\udc2c\ud835\udc29\ud835\udc1e\u0300\ud835\udc1c\ud835\udc1e\ud835\udc2c \ud835\udc2f\ud835\udc22\ud835\udc2f\ud835\udc1a\ud835\udc27\ud835\udc2d\ud835\udc1e\ud835\udc2c \ud835\udc2c\ud835\udc2e\ud835\udc2b \ud835\udc25\ud835\udc1a \ud835\udc29\ud835\udc25\ud835\udc1a\ud835\udc27\ud835\udc1e\u0300\ud835\udc2d\ud835\udc1e.<\/p>\n\n\n\n<p>The same thing happens in the lake. Like all species on earth, those living underwater also need to breathe! That's where aquatic plants come in. One of their roles is to provide \ud835\udc2d\ud835\udc1a\ud835\udc2e\ud835\udc31 \ud835\udc1c\ud835\udc28\ud835\udc27\ud835\udc2c\ud835\udc2d\ud835\udc1a\ud835\udc27\ud835\udc2d \ud835\udc1d'\ud835\udc28\ud835\udc31\ud835\udc32\ud835\udc20\ud835\udc1e\u0300\ud835\udc27\ud835\udc1e \ud835\udc1d\ud835\udc22\ud835\udc2c\ud835\udc2c\ud835\udc28\ud835\udc2e\ud835\udc2d \ud835\udc1d\ud835\udc1a\ud835\udc27\ud835\udc2c \ud835\udc25'\ud835\udc1e\ud835\udc1a\ud835\udc2e through photosynthesis. In fact, the underwater world of Lake Geneva is home to a multitude of macrophyte varieties that give rise to veritable sub-lacustrine forests. They can be found at \ud835\udc23\ud835\udc2e\ud835\udc2c\ud835\udc2a\ud835\udc2e'\ud835\udc1a\u0300 \ud835\udc2e\ud835\udc27\ud835\udc1e \ud835\udc29\ud835\udc2b\ud835\udc28\ud835\udc1f\ud835\udc28\ud835\udc27\ud835\udc1d\ud835\udc1e\ud835\udc2e\ud835\udc2b \ud835\udc1d\ud835\udc1e \ud835\udfcf\ud835\udfce \ud835\udc26\ud835\udc1e\u0300\ud835\udc2d\ud835\udc2b\ud835\udc1e\ud835\udc2c or thereabouts, where light can still penetrate. Characeae, myriophylls and periwinkle pondweeds dance with the currents to paint a magnificent picture of shades of green, blending into the blue hues of Lake Geneva.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"681\" height=\"1024\" src=\"https:\/\/dev.asleman.org\/wp-content\/uploads\/2020\/08\/52.2-681x1024.jpg\" alt=\"\" class=\"wp-image-5615\" srcset=\"https:\/\/asleman.org\/wp-content\/uploads\/2020\/08\/52.2-681x1024.jpg 681w, https:\/\/asleman.org\/wp-content\/uploads\/2020\/08\/52.2-199x300.jpg 199w, https:\/\/asleman.org\/wp-content\/uploads\/2020\/08\/52.2-768x1156.jpg 768w, https:\/\/asleman.org\/wp-content\/uploads\/2020\/08\/52.2-1021x1536.jpg 1021w, https:\/\/asleman.org\/wp-content\/uploads\/2020\/08\/52.2.jpg 1361w\" sizes=\"(max-width: 681px) 100vw, 681px\" \/><figcaption><em>Sub-lacustrine seagrass beds<\/em><\/figcaption><\/figure>\n\n\n\n<p>In addition to their role as \"\ud835\udc29\ud835\udc28\ud835\udc2e\ud835\udc26\ud835\udc28\ud835\udc27 \ud835\udc25\ud835\udc1a\ud835\udc1c\ud835\udc2e\ud835\udc2c\ud835\udc2d\ud835\udc2b\ud835\udc1e\", these forests provide support for \ud835\udc1f\ud835\udc2b\ud835\udc1a\ud835\udc22\ud835\udc1e\ud835\udc2c \ud835\udc29\ud835\udc28\ud835\udc2e\ud835\udc2b \ud835\udc25\ud835\udc1e\ud835\udc2c \ud835\udc29\ud835\udc28\ud835\udc22\ud835\udc2c\ud835\udc2c\ud835\udc28\ud835\udc27\ud835\udc2c, \ud835\udc1e\ud835\udc2d \ud835\udc2c\ud835\udc1e\ud835\udc2b\ud835\udc2f\ud835\udc1e\ud835\udc27\ud835\udc2d \ud835\udc1d\ud835\udc1e \ud835\udc27\ud835\udc28\ud835\udc2e\ud835\udc2b\ud835\udc2b\ud835\udc22\ud835\udc2d\ud835\udc2e\ud835\udc2b\ud835\udc1e \ud835\udc28\ud835\udc2e \ud835\udc1d'\ud835\udc21\ud835\udc1a\ud835\udc1b\ud835\udc22\ud835\udc2d\ud835\udc1a\ud835\udc2d\ud835\udc2c \ud835\udc1d\ud835\udc1e \ud835\udc27\ud835\udc28\ud835\udc26\ud835\udc1b\ud835\udc2b\ud835\udc1e\ud835\udc2e\ud835\udc31 (Perch, Pike, Roach....), \ud835\udc22\ud835\udc27\ud835\udc2f\ud835\udc1e\ud835\udc2b\ud835\udc2d\ud835\udc1e\u0301\ud835\udc1b\ud835\udc2b\ud835\udc1e\u0301\ud835\udc2c (molluscs, crustaceans, insect larvae...) \ud835\udc1e\ud835\udc2d \ud835\udc28\ud835\udc22\ud835\udc2c\ud835\udc1e\ud835\udc1a\ud835\udc2e\ud835\udc31 \ud835\udc1d'\ud835\udc1e\ud835\udc1a\ud835\udc2e (Coot, Ruddy Gull...). Since the 1980s, the concentration of phosphorus in the lake has fallen significantly, so aquatic plants have adapted to their environment. <\/p>\n\n\n\n<p>In view of the \ud835\udc1a\ud835\udc26\ud835\udc1e\u0301\ud835\udc25\ud835\udc22\ud835\udc28\ud835\udc2b\ud835\udc1a\ud835\udc2d\ud835\udc22\ud835\udc28\ud835\udc27 \ud835\udc1d\ud835\udc1e \ud835\udc25\ud835\udc1a \ud835\udc2a\ud835\udc2e\ud835\udc1a\ud835\udc25\ud835\udc22\ud835\udc2d\ud835\udc1e\u0301 \ud835\udc1d\ud835\udc1e \ud835\udc25 \ud835\udc1e\ud835\udc1a\ud835\udc2e and the resulting transparency, plants can thus colonise more ground at depth. This is why the presence of these aquatic plants serves as \ud835\udc22\ud835\udc27\ud835\udc1d\ud835\udc22\ud835\udc1c\ud835\udc1a\ud835\udc2d\ud835\udc1e\ud835\udc2e\ud835\udc2b \ud835\udc2a\ud835\udc2e\ud835\udc1a\ud835\udc27\ud835\udc2d \ud835\udc1a\u0300 \ud835\udc25\ud835\udc1a \ud835\udc2c\ud835\udc1a\ud835\udc27\ud835\udc2d\ud835\udc1e\u0301 \ud835\udc1d\ud835\udc2e \ud835\udc0b\ud835\udc1e\u0301\ud835\udc26\ud835\udc1a\ud835\udc27. Although they do not always delight bathers and boat owners, these sublacustrine forests are \ud835\udc29\ud835\udc2b\ud835\udc22\ud835\udc26\ud835\udc28\ud835\udc2b\ud835\udc1d\ud835\udc22\ud835\udc1a\ud835\udc25\ud835\udc1e\ud835\udc2c \ud835\udc29\ud835\udc28\ud835\udc2e\ud835\udc2b \ud835\udc25\ud835\udc1a \ud835\udc1b\ud835\udc22\ud835\udc28\ud835\udc1d\ud835\udc22\ud835\udc2f\ud835\udc1e\ud835\udc2b\ud835\udc2c\ud835\udc22\ud835\udc2d\ud835\udc1e\u0301.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>We invite you to take a closer look at them with our \ud835\udc1f\ud835\udc22\ud835\udc1c\ud835\udc21\ud835\udc1e\ud835\udc2c \ud835\udc1d\ud835\udc1e \ud835\udc1d\ud835\udc1e\u0301\ud835\udc2d\ud835\udc1e\ud835\udc2b\ud835\udc26\ud835\udc22\ud835\udc27\ud835\udc1a\ud835\udc2d\ud835\udc22\ud835\udc28\ud835\udc27\ud835\udc2c available on in our <a href=\"https:\/\/dev.asleman.org\/categorie-produit\/fiche-de-determination\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">\ud835\udc1b\ud835\udc28\ud835\udc2e\ud835\udc2d\ud835\udc22\ud835\udc2a\ud835\udc2e\ud835\udc1e \ud835\udc1e\ud835\udc27 \ud835\udc25\ud835\udc22\ud835\udc20\ud835\udc27\ud835\udc1e<\/a>. <\/p>\n\n\n\n<p>\ud835\udc12\ud835\udc28\ud835\udc2e\ud835\udc2b\ud835\udc1c\ud835\udc1e\ud835\udc2c :<br>ASL\" leaflet <a href=\"https:\/\/dev.asleman.org\/wp-content\/uploads\/2019\/04\/depliant-f%C3%B4ret-sous-lacustre.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">A sub-lake forest<\/a> \"<br>Tribune de Gen\u00e8ve, 16 August 2020 \" <a href=\"https:\/\/www.tdg.ch\/leau-du-leman-gagne-en-qualite-ses-plantes-le-disent-663362032443\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">The quality of Lake Geneva's water is improving, as its plants tell us <\/a>\" <\/p>","protected":false},"featured_media":5614,"template":"","mots-cles":[],"class_list":["post-5613","60_secondes","type-60_secondes","status-publish","has-post-thumbnail","hentry"],"acf":[],"ase":null,"_links":{"self":[{"href":"https:\/\/asleman.org\/en\/wp-json\/wp\/v2\/60_secondes\/5613","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/asleman.org\/en\/wp-json\/wp\/v2\/60_secondes"}],"about":[{"href":"https:\/\/asleman.org\/en\/wp-json\/wp\/v2\/types\/60_secondes"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/asleman.org\/en\/wp-json\/wp\/v2\/media\/5614"}],"wp:attachment":[{"href":"https:\/\/asleman.org\/en\/wp-json\/wp\/v2\/media?parent=5613"}],"wp:term":[{"taxonomy":"mots-cles","embeddable":true,"href":"https:\/\/asleman.org\/en\/wp-json\/wp\/v2\/mots-cles?post=5613"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}