{"id":586,"date":"2026-10-03T08:20:21","date_gmt":"2026-10-03T06:20:21","guid":{"rendered":"https:\/\/adeba.fr\/?p=586"},"modified":"2026-10-03T08:20:23","modified_gmt":"2026-10-03T06:20:23","slug":"mobilisation-des-sediments-dans-le-bassin-darcachon","status":"publish","type":"post","link":"https:\/\/adeba.fr\/index.php\/2026\/10\/03\/mobilisation-des-sediments-dans-le-bassin-darcachon\/","title":{"rendered":"Mobilisation des s\u00e9diments dans le Bassin d\u2019Arcachon\u00a0"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>INTRODUCTION<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A l\u2019exception des temp\u00eates, Il faut diff\u00e9rencier les brassages <strong>naturels&nbsp;<\/strong>par les mar\u00e9es ou par bioturbation <sup>(5)<\/sup> qui participent \u00e0 l\u2019\u00e9quilibre \u00e9cologique, et les <strong>interventions humaines<\/strong> brutales et m\u00e9canis\u00e9es qui provoquent de fortes perturbations, imm\u00e9diates et persistantes du milieu.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>LES CAUSES\u202fANTHROPIQUES<\/strong>\u202f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dragage des ports et des chenaux, curage hydraulique forc\u00e9 (jetting), r\u00e9-ensablement des plages, traitement des friches ostr\u00e9icoles par \u00e9crasement et nivellement du sol et divers travaux sous-marins s\u2019ajoutant aux effets du trafic incessant des nombreux bateaux circulant souvent trop vite.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>LES CONSEQUENCES\u202f:\u00a0<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Turbidit\u00e9\u00a0importante et r\u00e9manente<\/strong> avec perte d\u2019\u00e9clairement\/photosynth\u00e8se des fonds et red\u00e9position des particules fines\u00a0sur les herbiers de zost\u00e8res et les cultures ostr\u00e9icoles.\u00a0<\/li>\n\n\n\n<li><strong>Mobilisation de la pollution chimique<\/strong>, qu\u2019elle soit r\u00e9cente voire actuelle, ou m\u00eame ant\u00e9rieure et historique\u00a0; bien qu\u2019une att\u00e9nuation naturelle des polluants se produise \u00e0 moyen et long terme (par enfouissement, immobilisation, bio ou chimio d\u00e9gradation, remise en suspension avec transfert vers les hu\u00eetres et autres bivalves) \u00e0 vitesse variable selon leur nature et leur profondeur de stockage, la persistance de certains polluants anciens pose probl\u00e8me.\u00a0<\/li>\n\n\n\n<li><strong>Mobilisation de bact\u00e9ries<\/strong>, virus, esp\u00e8ces probl\u00e9matiques du phytoplancton benthique et parasites\u00a0pr\u00e9sents sous forme v\u00e9g\u00e9tative. Leur persistance environnementale\u202fsur plusieurs mois est source de r\u00e9 infestation et de r\u00e9activation saisonni\u00e8re.<\/li>\n\n\n\n<li><strong>R\u00e9surgence de souches microbiennes r\u00e9sistantes<\/strong>, d\u00e9velopp\u00e9es dans les s\u00e9dimentspar le processus de\u202ftransformation\u202fmicrobiologique,\u202fainsi que dans les biofilms, coquillages, herbiers et c\u00f4nes de d\u00e9jection des tributaires, constituant des lieux confin\u00e9s d\u2019\u00e9change et de stockage de g\u00eanes de r\u00e9sistance. <sup>(1-2-3-4)<\/sup>.<\/li>\n\n\n\n<li><strong>Relargage du carbone s\u00e9questr\u00e9<\/strong>, sous forme rest\u00e9e disponible ou partiellement d\u00e9grad\u00e9e dans ces espaces s\u00e9dimentaires stratifi\u00e9s.\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>CONCLUSION<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les effets de la mobilisation des s\u00e9diments caus\u00e9es par les activit\u00e9s anthropiques sont nombreux, importants, nocifs pour l\u2019environnement et le souvent difficiles \u00e0 appr\u00e9hender correctement. Ils doivent faire l\u2019objet d\u2019une meilleure prise en compte dans les \u00e9tudes et les d\u00e9cisions relatives \u00e0 l\u2019occupation du domaine maritime, \u00e0 son am\u00e9nagement et \u00e0 son entretien.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bibliographie\u202f:\u00a0<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1&#8211;Kuzyakov Y. , Blagodatskaya E. ( 2015) Microbial hotspots and hot moments in soil: Concept and review.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2-Soucy S.M., Huang J., Cogarten J.P.(2015). Horizontal gene transfer building the web of life. Nature Review Genetics. R\u00f4le du HGT ( Tansformation, Conjugaison, Transduction)&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3-Kim Lewis. (2021) The science of Antibiotic Persistence&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4-Arnold B.J., Huang I.-T., Hanage W.P.( 2022) Horizontal gene transfer and adaptative evolution in bacteria.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5-Influence of Cokle Bioturbation on microphytobenthos( 2025-02-05) Data package summary.&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>INTRODUCTION\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 A l\u2019exception des temp\u00eates, Il faut diff\u00e9rencier les brassages naturels&nbsp;par les mar\u00e9es ou par bioturbation (5) qui participent \u00e0 l\u2019\u00e9quilibre \u00e9cologique, et les interventions humaines brutales et m\u00e9canis\u00e9es qui provoquent de fortes perturbations, imm\u00e9diates et persistantes du milieu.&nbsp; LES &hellip; <a href=\"https:\/\/adeba.fr\/index.php\/2026\/10\/03\/mobilisation-des-sediments-dans-le-bassin-darcachon\/\">Continuer la lecture <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-586","post","type-post","status-publish","format-standard","hentry","category-fiches-tec"],"_links":{"self":[{"href":"https:\/\/adeba.fr\/index.php\/wp-json\/wp\/v2\/posts\/586","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/adeba.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/adeba.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/adeba.fr\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/adeba.fr\/index.php\/wp-json\/wp\/v2\/comments?post=586"}],"version-history":[{"count":1,"href":"https:\/\/adeba.fr\/index.php\/wp-json\/wp\/v2\/posts\/586\/revisions"}],"predecessor-version":[{"id":587,"href":"https:\/\/adeba.fr\/index.php\/wp-json\/wp\/v2\/posts\/586\/revisions\/587"}],"wp:attachment":[{"href":"https:\/\/adeba.fr\/index.php\/wp-json\/wp\/v2\/media?parent=586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/adeba.fr\/index.php\/wp-json\/wp\/v2\/categories?post=586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/adeba.fr\/index.php\/wp-json\/wp\/v2\/tags?post=586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}