{"id":20147,"date":"2024-05-14T12:32:49","date_gmt":"2024-05-14T10:32:49","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=20147"},"modified":"2024-05-14T14:49:37","modified_gmt":"2024-05-14T12:49:37","slug":"la-metamorfosi-de-la-riera-de-vallvidrera","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/la-metamorfosi-de-la-riera-de-vallvidrera\/","title":{"rendered":"La metamorfosi de la riera de Vallvidrera"},"content":{"rendered":"<p>Dilluns 13 de maig l&#8217;alumnat de GES (Grau en Educaci\u00f3 Secund\u00e0ria) de <span style=\"font-family: inherit; font-size: 1em;\">l<strong>\u2019<\/strong><a href=\"https:\/\/agora.xtec.cat\/cfarafaelfarre\/\" target=\"_blank\" rel=\"noopener\">Escola d&#8217;Adults Rafael Farr\u00e9<\/a><\/span><span style=\"font-family: inherit; font-size: 1em;\"> de Molins de Rei han vingut al <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/\">Camp d&#8217;aprenentatge de Can Santoi<\/a> amb el prop\u00f2sit d&#8217;estudiar a fons <\/span>l\u2019<a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/ambits\/dinamica-dels-ecosistemes\/estudi-ecologic-de-la-riera-de-vallvidrera\/\">ecosistema de la riera<\/a><span style=\"font-family: inherit; font-size: 1em;\"> de Vallvidrera per poder con\u00e8ixer quina \u00e9s la qualitat de les seves aig\u00fces a partir del <strong>m\u00e8tode dels indicadors bi\u00f2tics<\/strong>.<\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: 1em;\">Han comen\u00e7at l&#8217;activitat amb una breu introducci\u00f3 amb l&#8217;objectiu de descriure els principals indicadors que farien servir en el seu estudi: els corresponents als par\u00e0metres que reflecteixen les propie<\/span><span style=\"font-family: inherit; font-size: 1em;\">tats fisicoqu\u00edmiques del <strong>bi\u00f2top<\/strong> i els dels macroinvertebrats que conformen la <strong>biocenosi<\/strong>, a partir de la seva captura i identificaci\u00f3. <\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: 1em;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-20149\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/05\/1-5.jpg\" alt=\"\" width=\"223\" height=\"168\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/05\/1-5.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/05\/1-5-200x150.jpg 200w\" sizes=\"auto, (max-width: 223px) 100vw, 223px\" \/>Despr\u00e9s s&#8217;han organitzat en grups de treball i han agafat tot el material necessari. Del bi\u00f2top, han recollit els valors dels par\u00e0metres seg\u00fcents: temperatura de l&#8217;aigua i de l&#8217;aire; color, olor i pres\u00e8ncia d&#8217;escuma a l&#8217;aigua; velocitat del flux i determinaci\u00f3 del cabal de la riera. L&#8217;estudi de la biocenosi ha consistit en fer una recol\u00b7lecci\u00f3 de macroinvertebrats aqu\u00e0tics, mirant de no alterar gaire el fons de la riera.<\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: 1em;\">Han trobat un nombre considerable d&#8217;organismes: espiadimonis, cargols de fang, gambes d&#8217;aigua dol\u00e7a, barretets, una ef\u00edmera, larves de mosca negra, sabaters, grills d&#8217;aigua i fins i tot dues lib\u00e8l\u00b7lules! Despr\u00e9s, al laboratori, els han observat i classificat amb l&#8217;ajut de les lupes binoculars, anotant el seu \u00edndex bi\u00f2tic associat.<\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: 1em;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-20151 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/05\/3-4.jpg\" alt=\"\" width=\"323\" height=\"242\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/05\/3-4.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2024\/05\/3-4-200x150.jpg 200w\" sizes=\"auto, (max-width: 323px) 100vw, 323px\" \/>La suma dels \u00edndex bi\u00f2tics dels organismes presents en el tram de riera inspeccionat els ha proporcionat uns valors de 46 (dins d&#8217;un interval de 0 a 120), resultant una <strong>qualitat de l&#8217;aigua mediocre<\/strong>. Els estudiants han reflexionat sobre la utilitat d&#8217;aquests indicadors i la import\u00e0ncia de preservar la biodiversitat dels ecosistemes.<\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: 1em;\">Han gaudit for\u00e7a de tenir tan a prop aquest entorn natural del Parc Natural de la Serra de Collserola. Fins aviat!<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dilluns 13 de maig l&#8217;alumnat de GES (Grau en Educaci\u00f3 Secund\u00e0ria) de l\u2019Escola d&#8217;Adults Rafael Farr\u00e9 de Molins de Rei han vingut al Camp d&#8217;aprenentatge de Can Santoi amb el prop\u00f2sit d&#8217;estudiar a fons l\u2019ecosistema de la riera de Vallvidrera per poder con\u00e8ixer quina \u00e9s la qualitat de les seves aig\u00fces a partir del m\u00e8tode [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":20150,"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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