{"id":23431,"date":"2025-05-20T11:50:31","date_gmt":"2025-05-20T09:50:31","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=23431"},"modified":"2025-05-20T16:51:41","modified_gmt":"2025-05-20T14:51:41","slug":"cargols-i-libellules-amb-el-marti-dot","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/cargols-i-libellules-amb-el-marti-dot\/","title":{"rendered":"Cargols i lib\u00e8l\u00b7lules amb el Mart\u00ed Dot"},"content":{"rendered":"<p style=\"text-align: justify;\">Dilluns 19 de maig 2025 hem rebut al <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/\">CdA Can Santoi<\/a> els estudiants de la mat\u00e8ria de Biologia de 1r de Batxillerat de l&#8217;<a href=\"https:\/\/agora.xtec.cat\/insmartidot\/\" target=\"_blank\" rel=\"noopener\">Institut Mart\u00ed Dot\u00a0<\/a> de Sant Feliu de Llobregat, que han vingut per avaluar l&#8217;actual <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/ambits\/dinamica-dels-ecosistemes\/introduccio-a-la-limnologia-cursos-fluvials\/\" target=\"_blank\" rel=\"noopener\">estat ecol\u00f2gic de la riera de Vallvidrera.<\/a><\/p>\n<p style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-23448 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/05\/IMG_20250519_113910bis-300x224.jpg\" alt=\"\" width=\"300\" height=\"224\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/05\/IMG_20250519_113910bis-300x224.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/05\/IMG_20250519_113910bis.jpg 400w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>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 style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-23450\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/05\/muntatge-2-224x300.jpg\" alt=\"\" width=\"224\" height=\"300\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/05\/muntatge-2-224x300.jpg 224w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/05\/muntatge-2.jpg 483w\" sizes=\"auto, (max-width: 224px) 100vw, 224px\" \/>Un cop a la riera han recollit tot un seguit de dades organitzats per equips (coordenades UTM, temperatura de l&#8217;aire i de l&#8217;aigua, amplada, fond\u00e0ria, velocitat, transpar\u00e8ncia, olor, granulometria&#8230;) 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 (mitjan\u00e7ant el QRISI). Finalment s\u2019han dedicat a capturar macroinvertebrats aqu\u00e0tics que posteriorment farien servir com a bioindicadors. Han aconseguit recol\u00b7lectar una gran diversitat d\u2019organismes: ef\u00edmeres, espiadimonis, cargols aqu\u00e0tics (cargols de fang i barretets), gambes d&#8217;aigua dol\u00e7a, larves de mosca negra, sabaters, grills d&#8217;aigua, un escorp\u00ed d&#8217;aigua i fins i tot una larva de t\u00edpula.<\/p>\n<p style=\"text-align: justify;\">Al laboratori han analitzat les mostres d&#8217;aigua per calcular par\u00e0metres com la duresa, la concentraci\u00f3 de nitrits, nitrats i fosfats, el pH, l&#8217;oxigen dissolt o la conductivitat (per con\u00e8ixer la mineralitzaci\u00f3) 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 style=\"text-align: justify;\">Han estudiat els macroinvertebrats capturats amb l\u2019ajut de lupes binoculars i fitxes identificatives per determinar el seu \u00edndex bi\u00f2tic. Amb tota aquesta informaci\u00f3 fisicoqu\u00edmica i biol\u00f2gica han determinat una 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>Dilluns 19 de maig 2025 hem rebut al CdA Can Santoi els estudiants de la mat\u00e8ria de Biologia de 1r de Batxillerat de l&#8217;Institut Mart\u00ed Dot\u00a0 de Sant Feliu de Llobregat, que han vingut per avaluar l&#8217;actual estat ecol\u00f2gic de la riera de Vallvidrera. Primer han contextualitzat l\u2019\u00e0rea a estudiar calculant la superf\u00edcie de la [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":23447,"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":"default","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":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","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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