{"id":18995,"date":"2024-01-30T16:02:38","date_gmt":"2024-01-30T15:02:38","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=18995"},"modified":"2024-02-26T12:48:30","modified_gmt":"2024-02-26T11:48:30","slug":"the-stream-knows","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/the-stream-knows\/","title":{"rendered":"The stream knows"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-19012 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/01\/1-5.jpg\" alt=\"\" width=\"347\" height=\"260\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/01\/1-5.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/01\/1-5-200x150.jpg 200w\" sizes=\"auto, (max-width: 347px) 100vw, 347px\" \/>Aquest dimecres 24 de gener de 2024, els estudiants de la mat\u00e8ria de biologia de 1r de Batxillerat de l&#8217;<a href=\"http:\/\/www.institutjoanbrossa.cat\/\">Institut Joan Brossa<\/a> de Barcelona, juntament amb el grup d&#8217;alumnes de Mil\u00e0 (It\u00e0lia) que aquest curs formen part del projecte Erasmus+, han vingut a avaluar <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/ambits\/dinamica-dels-ecosistemes\/introduccio-a-la-limnologia-cursos-fluvials\/\" target=\"_blank\" rel=\"noopener\">l&#8217;estat ecol\u00f2gic de la riera de Vallvidrera.<\/a><\/p>\n<p>Primer han contextualitzat l\u2019\u00e0rea a estudiar calculant la superf\u00edcie de la conca hidrogr\u00e0fica i esbrinant de quins materials geol\u00f2gics est\u00e0 formada. Despr\u00e9s s\u2019han organitzat en equips de treball i han revisat el material necessari per dur a terme l\u2019estudi de camp, tant dels par\u00e0metres fisicoqu\u00edmics (bi\u00f2top) com dels referents a la biodiversitat (biocenosi), per poder determinar la qualitat de l\u2019aigua de la riera.<\/p>\n<p>Un cop a la riera han recollit les dades per equips (coordenades, temperatures, fond\u00e0ria, velocitat, transpar\u00e8ncia, olor, granulometria, cabal, etc.) i han agafat mostres d\u2019aigua per completar l\u2019an\u00e0lisi al laboratori. Tamb\u00e9 han valorat l\u2019estat de conservaci\u00f3 de la vegetaci\u00f3 del bosc de ribera. I finalment s\u2019han dedicat a capturar macroinvertebrats aqu\u00e0tics que posteriorment farien servir com a bioindicadors. Han aconseguit recol\u00b7lectar una \u00e0mplia diversitat d\u2019organismes: ef\u00edmeres, espiadimonis, cargols aqu\u00e0tics, sabaters i altres.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-19013\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/01\/2-4-225x300.jpg\" alt=\"\" width=\"238\" height=\"317\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/01\/2-4-225x300.jpg 225w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/01\/2-4.jpg 300w\" sizes=\"auto, (max-width: 238px) 100vw, 238px\" \/>Al laboratori han pogut acabar de calcular par\u00e0metres com la duresa, conductivitat, mineralitzaci\u00f3, concentraci\u00f3 de nitrits i fosfats, pH i oxigen dissolt amb l\u2019ajuda dels kits de valoraci\u00f3 del <a href=\"http:\/\/www.projecterius.cat\/front\" target=\"_blank\" rel=\"noopener noreferrer\">Projecte Rius<\/a>.<\/p>\n<p>Han estudiat els macroinvertebrats capturats amb l\u2019ajut de lupes binoculars i fitxes identificatives per determinar el seu \u00edndex biol\u00f2gic. Amb tota aquesta informaci\u00f3 fisicoqu\u00edmica i biol\u00f2gica han determinat la qualitat mediocre de l\u2019aigua.<\/p>\n<p>Per acabar s\u2019han tornat a alliberar sans i estalvis tots els animals capturats al seu h\u00e0bitat, on seguiran el seu cicle de vida.<\/p>\n<p>Felicitats per la feina realitzada!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aquest dimecres 24 de gener de 2024, els estudiants de la mat\u00e8ria de biologia de 1r de Batxillerat de l&#8217;Institut Joan Brossa de Barcelona, juntament amb el grup d&#8217;alumnes de Mil\u00e0 (It\u00e0lia) que aquest curs formen part del projecte Erasmus+, han vingut a avaluar l&#8217;estat ecol\u00f2gic de la riera de Vallvidrera. Primer han contextualitzat l\u2019\u00e0rea [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":19014,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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