{"id":3883,"date":"2007-03-04T18:16:58","date_gmt":"2007-03-04T16:16:58","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil1\/?p=3883"},"modified":"2015-04-11T18:18:33","modified_gmt":"2015-04-11T16:18:33","slug":"le-veritable-poumon-de-la-terre-cest-locean","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/le-veritable-poumon-de-la-terre-cest-locean\/","title":{"rendered":"Le v\u00e9ritable &lsquo;poumon de la Terre&rsquo;, c&rsquo;est l&rsquo;oc\u00e9an."},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p><span style=\"font-size: small;\">On entend souvent dire qu&rsquo;\u00e0 force de d\u00e9boiser la for\u00eat amazonienne, on va manquer d&rsquo;oxyg\u00e8ne. Mais le v\u00e9ritable \u00ab\u00a0poumon de la Terre\u00a0\u00bb, c&rsquo;est l&rsquo;oc\u00e9an.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Le poumon est un organe qui assure le renouvellement du dioxyg\u00e8ne (O2) et l&rsquo;\u00e9limination du gaz carbonique (CO2) produit par la respiration cellulaire de chaque organisme. Or, justement, les v\u00e9g\u00e9taux verts produisent du dioxyg\u00e8ne et consomment du dioxyde de carbone au cours de la photosynth\u00e8se. Voil\u00e0 pourquoi l&rsquo;on compare les for\u00eats \u00e0 des poumons.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">(le v\u00e9ritable poumon de la Terre est l&rsquo;oc\u00e9an, image Nasa)<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Les for\u00eats : O2 \u00e9mis = O2 consomm\u00e9<br \/>\nMais de l\u00e0 \u00e0 ce qu&rsquo;elles soient LE poumon de la Terre, c&rsquo;est exag\u00e9r\u00e9. Evidemment, les for\u00eats produisent de l&rsquo;oxyg\u00e8ne. Mais elles en consomment aussi. D&rsquo;ailleurs, si l&rsquo;on compare les effets de la photosynth\u00e8se et les produits de la respiration des v\u00e9g\u00e9taux et de l&rsquo;\u00e9norme biomasse des sols forestiers, les bilans production-consommation d&rsquo;O2 et consommation-production de CO2 sont \u00e9quilibr\u00e9s.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Donc, contrairement \u00e0 une id\u00e9e re\u00e7ue, les arbres et v\u00e9g\u00e9taux de la terre ferme ne sont pas les principaux producteurs d&rsquo;oxyg\u00e8ne. Bref, le titre de \u00ab\u00a0poumon de la terre\u00a0\u00bb ne revient pas aux for\u00eats.<\/span><\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p align=\"justify\"><span style=\"font-size: small;\">Les oc\u00e9ans : r\u00e9serve de plancton et de CO2 dissous<br \/>\nQui alors est responsable du renouvellement de l&rsquo;oxyg\u00e8ne de l&rsquo;atmosph\u00e8re ? Elle en comporte 21% en volume tout de m\u00eame ! Ce sont les oc\u00e9ans. Pour deux raisons : c&rsquo;est l\u00e0 que vit le phytoplancton, ou plancton v\u00e9g\u00e9tal, form\u00e9 de minuscules algues. Celui-ci constitue une biomasse bien plus importante que celle des for\u00eats. C&rsquo;est lui le premier producteur d&rsquo;O2 et recycleur de CO2.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">De plus, au r\u00f4le du phytoplancton s&rsquo;ajoute la solubilisation du CO2 dans l&rsquo;eau oc\u00e9anique et le pi\u00e9geage de ce CO2 dissous dans les s\u00e9diments calcaires qui s&rsquo;accumulent depuis des millions d&rsquo;ann\u00e9es au fond des mers.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Finalement, ce prestigieux titre de poumon de la terre revient aux oc\u00e9ans. Donc prot\u00e9geons-les bien s\u00fbr, mais que cela n&#8217;emp\u00eache pas de lutter contre la d\u00e9forestation&#8230;&#8230;Pour la for\u00eat amazonienne, l&rsquo;\u00e9quivalant d&rsquo;un terrain de football est d\u00e9truit tout les quatre secondes, soit 159 km\u00b2 chaque jour. L&rsquo;oxyg\u00e8ne n&rsquo;est pas menac\u00e9, certes, mais la biodiversit\u00e9, elle, s&rsquo;\u00e9tiole peu \u00e0 peu.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">source : <\/span><a href=\"http:\/\/www.linternaute.com\/\"><span style=\"color: #8bc7ff; font-size: small;\">http:\/\/www.linternaute.com\/<\/span><\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"3883\">(402)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>On entend souvent dire qu&rsquo;\u00e0 force de d\u00e9boiser la for\u00eat amazonienne, on va manquer d&rsquo;oxyg\u00e8ne. Mais le v\u00e9ritable \u00ab\u00a0poumon de&#8230;<\/p>\n","protected":false},"author":1,"featured_media":3884,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[27],"tags":[289,3123,241,286,3122,3120,3124,3121,308],"class_list":["post-3883","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ecologie","tag-arbres","tag-o2","tag-ocean","tag-oxygene","tag-photynthese","tag-poumons","tag-respiration","tag-vegetaux","tag-vie","wpcat-27-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/chlorophylle.jpg?fit=250%2C186&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-10D","jetpack-related-posts":[{"id":9524,"url":"https:\/\/www.laterredufutur.com\/accueil\/respiration-terrestre\/","url_meta":{"origin":3883,"position":0},"title":"Respiration Terrestre","author":"Admin","date":"23 novembre 2015","format":false,"excerpt":"Tel un humain absorbant de l\u2019oxyg\u00e8ne et expirant du CO2, la vie v\u00e9g\u00e9tale sur\u00a0Terre n\u2019est pas statique, mais croit\u00a0et d\u00e9croit\u00a0avec les saisons. Une nouvelle animation de la NASA, l\u2019agence spatiale am\u00e9ricaine, montre une ann\u00e9e dans la vie des plantes sur la terre et dans les oc\u00e9ans et de respiration de\u2026","rel":"","context":"Dans &quot;Ecologie&quot;","block_context":{"text":"Ecologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/ecologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/globe-terrestre-co2.jpg?fit=559%2C375&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/globe-terrestre-co2.jpg?fit=559%2C375&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/globe-terrestre-co2.jpg?fit=559%2C375&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":4410,"url":"https:\/\/www.laterredufutur.com\/accueil\/perou-un-poumon-geant-pour-combattre-la-pollution\/","url_meta":{"origin":3883,"position":1},"title":"P\u00e9rou : un &lsquo;poumon g\u00e9ant&rsquo; pour combattre la pollution","author":"Admin","date":"5 mai 2008","format":false,"excerpt":"On l'appelle le \"super arbre\", mais ses inventeurs pr\u00e9f\u00e8rent parler d'un \"poumon g\u00e9ant\" pour qualifier cette machine de cinq m\u00e8tres de haut, aspirant les particules et les gaz nocifs tout en recrachant de l'oxyg\u00e8ne, et qui pourrait \u00eatre une solution pour les villes fortement pollu\u00e9es comme Lima, la capitale p\u00e9ruvienne.\u2026","rel":"","context":"Dans &quot;Solutions&quot;","block_context":{"text":"Solutions","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/solutions\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/spaw\/images\/PAU-20-1.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":3777,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-cycle-de-lazote\/","url_meta":{"origin":3883,"position":2},"title":"Le cycle de l&rsquo;Azote","author":"Admin","date":"14 d\u00e9cembre 2006","format":false,"excerpt":"Quand la pollution humaine enregistre des records d'ann\u00e9es en ann\u00e9es. Le changement humain du cycle de l'azote, ses flux de ce\u00a0composant et les cons\u00e9quences r\u00e9sultantes changent de mani\u00e8re significative\u00a0selon o\u00f9\u00a0vous \u00eates dans le monde. Pour illustrer le degr\u00e9 du changement et de l'h\u00e9t\u00e9rog\u00e9n\u00e9it\u00e9 r\u00e9gionale, ici cet article\u00a0contient des cartes concernant\u2026","rel":"","context":"Dans &quot;Pollution&quot;","block_context":{"text":"Pollution","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/pollution\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/laterredufutur.com\/spaw\/images\/maps-1860.gif?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":8579,"url":"https:\/\/www.laterredufutur.com\/accueil\/lhomme-est-le-fleau-de-notre-monde\/","url_meta":{"origin":3883,"position":3},"title":"L\u2019Homme est le fl\u00e9au de notre monde","author":"Admin","date":"9 octobre 2015","format":false,"excerpt":"La plan\u00e8te Terre n\u2019a plus le visage qu\u2019elle avait il y a des centaines de milliers d\u2019ann\u00e9es et l\u2019homme pollue sans cesse alors que la situation actuelle est grave ! Les photos que nous avons s\u00e9lectionn\u00e9es pour vous proviennent d\u2019un livre intitul\u00e9 \u00bb Overdevelopment, Overpopulation, Overshoot \u00ab qui regroupe des\u2026","rel":"","context":"Dans &quot;Monde Futur&quot;","block_context":{"text":"Monde Futur","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/monde-futur\/"},"img":{"alt_text":"Incendie sur une plate-forme p\u00e9troli\u00e8re dans le golfe du Mexique, Avril 2010","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/Incendie-sur-une-plate-forme-p%C3%A9troli%C3%A8re-dans-le-golfe-du-Mexique-Avril-2010.jpg?fit=960%2C639&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/Incendie-sur-une-plate-forme-p%C3%A9troli%C3%A8re-dans-le-golfe-du-Mexique-Avril-2010.jpg?fit=960%2C639&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/Incendie-sur-une-plate-forme-p%C3%A9troli%C3%A8re-dans-le-golfe-du-Mexique-Avril-2010.jpg?fit=960%2C639&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/Incendie-sur-une-plate-forme-p%C3%A9troli%C3%A8re-dans-le-golfe-du-Mexique-Avril-2010.jpg?fit=960%2C639&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":22869,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-monde-connait-un-grave-probleme-de-deforestation-explications\/","url_meta":{"origin":3883,"position":4},"title":"Le monde conna\u00eet un grave probl\u00e8me de d\u00e9forestation. Explications","author":"Admin","date":"4 ao\u00fbt 2021","format":false,"excerpt":"En janvier 2021, le Fonds mondial pour la nature (WWF) a publi\u00e9 un rapport sur l'\u00e9tat du probl\u00e8me de la d\u00e9forestation dans le monde et sur 24 \"fronts de d\u00e9forestation\", c'est-\u00e0-dire des endroits o\u00f9 de vastes zones de for\u00eat sont menac\u00e9es. L'\u00e9tude conclut que 43 millions d'hectares de for\u00eats dans\u2026","rel":"","context":"Dans &quot;Ecologie&quot;","block_context":{"text":"Ecologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/ecologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/08\/deforestation.jpg?fit=1181%2C624&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/08\/deforestation.jpg?fit=1181%2C624&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/08\/deforestation.jpg?fit=1181%2C624&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/08\/deforestation.jpg?fit=1181%2C624&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/08\/deforestation.jpg?fit=1181%2C624&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":9567,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-nasa-devoile-une-carte-animee-des-pays-les-plus-pollueurs-de-la-planete\/","url_meta":{"origin":3883,"position":5},"title":"La Nasa d\u00e9voile une carte anim\u00e9e des pays les plus pollueurs de la plan\u00e8te","author":"Admin","date":"25 novembre 2015","format":false,"excerpt":"La NASA a r\u00e9cemment publi\u00e9 une carte anim\u00e9e permettant le visionnage du d\u00e9placement du dioxyde de carbone dans l\u2019atmosph\u00e8re ainsi que la localisation des \u00e9missions de ce gaz \u00e0 effet de serre. La carte affiche deux diff\u00e9rentes sources de rejet de dioxyde de carbone (CO2), \u00e0 la fois de la\u2026","rel":"","context":"Dans &quot;Pollution&quot;","block_context":{"text":"Pollution","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/pollution\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/pollution-mondiale-nasa.jpg?fit=850%2C472&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/pollution-mondiale-nasa.jpg?fit=850%2C472&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/pollution-mondiale-nasa.jpg?fit=850%2C472&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/pollution-mondiale-nasa.jpg?fit=850%2C472&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/3883","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=3883"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/3883\/revisions"}],"predecessor-version":[{"id":3885,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/3883\/revisions\/3885"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/3884"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=3883"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=3883"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=3883"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}