{"id":724,"date":"2014-04-20T13:45:41","date_gmt":"2014-04-20T12:45:41","guid":{"rendered":"http:\/\/localhost\/direction\/?p=724"},"modified":"2014-05-21T13:48:46","modified_gmt":"2014-05-21T12:48:46","slug":"la-bio-indication-de-la-pollution-aquatique-par-les-microalgues","status":"publish","type":"post","link":"https:\/\/synthese.univ-annaba.dz\/?p=724","title":{"rendered":"La bio-indication de la pollution aquatique par les microalgues"},"content":{"rendered":"

Num\u00e9ro de la revue<\/strong>: 27
\nAuteurs<\/strong>: Asma Necib, Houda Rezig & Larbi Boughediri
\nLaboratoire de Recherche en Biologie V\u00e9g\u00e9tale et Environnement, Facult\u00e9 des Sciences, D\u00e9partement de Biologie. Universit\u00e9 Badji Mokhtar, BP 12,23000\u00a0Annaba, Alg\u00e9rie <\/i><\/p>\n

T\u00e9l\u00e9charger l’article\"p2\"<\/strong><\/a><\/p>\n

R\u00e9sum\u00e9 <\/strong><\/p>\n

Les milieux aquatiques continentaux sont des \u00e9cosyst\u00e8mes complexes, fragiles et r\u00e9gis par des lois physico-chimiques pr\u00e9cises. Les microalgues qui les colonisent vivent en \u00e9quilibre instable et en d\u00e9pendent totalement. Les genres les plus tol\u00e9rants s\u2019adaptent \u00e0 l\u2019entr\u00e9e d\u2019une substance exog\u00e8ne ou \u00e0 une modification des param\u00e8tres physico-chimiques. Nous avons utilis\u00e9 des microalgues comme indicatrices biologiques de la pollution aquatique dans deux hydrosyst\u00e8mes\u00a0: L’oued \u00ab\u00a0Bounamoussa\u00a0\u00bb et le Lac des \u00ab\u00a0Oiseaux\u00a0\u00bb (W. El-Tarf). La m\u00e9thode appliqu\u00e9e est celle de l\u2019indice de pollution organique pr\u00e9conis\u00e9e par Palmer (1969) qui consiste \u00e0 traduire le niveau de la contamination dans les \u00e9chantillons de l\u2019eau. L’observation des caract\u00e8res morphologiques des microalgues r\u00e9colt\u00e9es nous a permis de recenser 20 genres. Nous avons enregistr\u00e9 10 genres dans l’Oued \u00ab\u00a0Bounamoussa\u00a0\u00bb: Microcystis, Euglena<\/i>, Lepocinclis, Gomphonema, Melosira, Navicula, Synedra, Chlorella, Closterium <\/i>et Scenedesmus.<\/i> Au niveau du Lac des \u00ab\u00a0Oiseaux\u00a0\u00bb, nous avons not\u00e9 l’existence de 17 genres: Aphanizomenon, Anabaena, Cylindrospermum, Merismopedia, Microcystis, Phormidium, Synechocystis, Phacus,<\/i> Cyclotella, Gomphonema, Navicula, Synedra, Ankistrodesmus, Chlorella, Closterium, Pediastrum <\/i>et Scenedesmus<\/i>. Les r\u00e9sultats montrent que les densit\u00e9s algales les plus \u00e9lev\u00e9es sont enregistr\u00e9es dans le Lac des \u00ab\u00a0Oiseaux\u00a0\u00bb, suivi de l’Oued \u00ab\u00a0Bounamoussa\u00a0\u00bb. Selon l\u2019indice de pollution de Palmer (1969), nous avons constat\u00e9 qu\u2019il existe une faible pollution organique (indice = 9) au niveau de l\u2019Oued \u00ab\u00a0Bounamoussa\u00a0\u00bb. En revanche, la contamination dans le site du Lac des \u00ab\u00a0Oiseaux\u00a0\u00bb par la mati\u00e8re organique est consid\u00e9r\u00e9e comme moyenne (indice = 12).<\/p>\n

Mots cl\u00e9s: <\/i><\/b>Pollution organique – Microalgues – Bioindication – Genres tol\u00e9rants d\u2019algues – Indice de Palmer (1969). <\/b><\/i><\/p>\n","protected":false},"excerpt":{"rendered":"

Num\u00e9ro de la revue: 27 Auteurs: Asma Necib, Houda Rezig & Larbi Boughediri Laboratoire de Recherche en Biologie V\u00e9g\u00e9tale et Environnement, Facult\u00e9 des Sciences, D\u00e9partement de Biologie. Universit\u00e9 Badji Mokhtar, BP 12,23000\u00a0Annaba, Alg\u00e9rie T\u00e9l\u00e9charger l’article R\u00e9sum\u00e9 Les milieux aquatiques continentaux … Lire la suite »<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[30,31,79,29,28],"class_list":["post-724","post","type-post","status-publish","format-standard","hentry","category-numero-27","tag-bioindication","tag-genres-tolerants-dalgues","tag-indice-de-palmer-1969","tag-microalgues","tag-pollution-organique"],"_links":{"self":[{"href":"https:\/\/synthese.univ-annaba.dz\/index.php?rest_route=\/wp\/v2\/posts\/724","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/synthese.univ-annaba.dz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/synthese.univ-annaba.dz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/synthese.univ-annaba.dz\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/synthese.univ-annaba.dz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=724"}],"version-history":[{"count":15,"href":"https:\/\/synthese.univ-annaba.dz\/index.php?rest_route=\/wp\/v2\/posts\/724\/revisions"}],"predecessor-version":[{"id":1879,"href":"https:\/\/synthese.univ-annaba.dz\/index.php?rest_route=\/wp\/v2\/posts\/724\/revisions\/1879"}],"wp:attachment":[{"href":"https:\/\/synthese.univ-annaba.dz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/synthese.univ-annaba.dz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/synthese.univ-annaba.dz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}