{"id":16680,"date":"2023-02-15T16:11:30","date_gmt":"2023-02-15T15:11:30","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=16680"},"modified":"2023-02-15T16:11:30","modified_gmt":"2023-02-15T15:11:30","slug":"trobem-gambes-a-la-riera","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/trobem-gambes-a-la-riera\/","title":{"rendered":"Trobem gambes a la riera!"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-16687 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/4-2-244x300.jpg\" alt=\"\" width=\"156\" height=\"191\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/4-2-244x300.jpg 244w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/4-2.jpg 300w\" sizes=\"auto, (max-width: 156px) 100vw, 156px\" \/>Quina sorpresa s&#8217;ha endut l&#8217;alumnat de 2n d&#8217;ESO A de <span style=\"font-family: inherit; font-size: 1em;\">l<strong>\u2019<a href=\"https:\/\/www.villena.cat\/\">Escola Isabel de Villena<\/a><\/strong><\/span><span style=\"font-family: inherit; font-size: 1em;\"> d&#8217;Esplugues de Llobregat <\/span>quan han aixecat una pedra de la riera i han vist com un munt de gambes d&#8217;aigua dol\u00e7a fugien en totes direccions! I \u00e9s que avui s&#8217;ho han passat d&#8217;all\u00f2 m\u00e9s b\u00e9 <span style=\"font-family: inherit; font-size: 1em;\">estudiant 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. La seva intenci\u00f3 era con\u00e8ixer quina \u00e9s la qualitat de les seves aig\u00fces a partir del <strong>m\u00e8tode dels indicadors bi\u00f2tics<\/strong>, per aix\u00f2 avui s&#8217;han despla\u00e7at fins al <em>Parc Natural de la Serra de Collserola<\/em>.<\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: 1em;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright  wp-image-16707\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/5-300x225.jpg\" alt=\"\" width=\"572\" height=\"429\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/5-300x225.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/5-200x150.jpg 200w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/5.jpg 640w\" sizes=\"auto, (max-width: 572px) 100vw, 572px\" \/>Un cop ubicats al <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/\">Camp d&#8217;aprenentatge de Can Santoi<\/a> han iniciat l&#8217;activitat amb una breu introducci\u00f3 per descriure els principals indicadors que farien servir en el seu estudi: els corresponents a les variables que caracteritzen les propietats fisicoqu\u00edmiques de l&#8217;ecosistema (el <strong>bi\u00f2top<\/strong>) i l&#8217;obtingut a partir de l&#8217;\u00edndex bi\u00f2tic de les comunitats de macro invertebrats que hi viuen (la <strong>biocenosi<\/strong>).<\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: 1em;\">Del bi\u00f2top, han recollit els valors dels par\u00e0metres seg\u00fcents: temperatura de l&#8217;aigua i de l&#8217;aire, transpar\u00e8ncia, color i olor de l&#8217;aigua, i la velocitat i l&#8217;\u00e0rea de la secci\u00f3 transversal per poder calcular el cabal.<\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: 1em;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-16691 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/munt-7-300x300.jpg\" alt=\"\" width=\"336\" height=\"336\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/munt-7.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/munt-7-150x150.jpg 150w\" sizes=\"auto, (max-width: 336px) 100vw, 336px\" \/>L&#8217;estudi de la biocenosi ha consistit en fer una captura d&#8217;animals, mirant de no alterar gaire el fons de la riera, per tal d&#8217;identificar-los posteriorment al laboratori amb les lupes binoculars. <\/span><span style=\"font-family: inherit; font-size: 1em;\">Han trobat un nombre considerable d&#8217;organismes, com ara espiadimonis, cargols de fang, gambes d&#8217;aigua dol\u00e7a, barretets, larves de mosca negra, de t\u00edpula i de mosquit d&#8217;eixam, ef\u00edmeres, una frig\u00e0nia, un cuc de terra, diverses plan\u00e0ries i fins i tot un parell de peixos i un capgr\u00f2s! <\/span><span style=\"font-family: inherit; font-size: 1em;\">Una vegada identificats tots els organismes presents en el tram de riera inspeccionat han calculat la suma dels seus \u00edndex bi\u00f2tics i han pogut comprovar que la qualitat de l&#8217;aigua de la riera era mediocre, ja que el valor resultant ha estat de 43 en una escala de 0 a 120. <\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: 1em;\">Finalment els estudiants han reflexionat sobre la utilitat d&#8217;aquests indicadors i la import\u00e0ncia de preservar la biodiversitat dels ecosistemes per tal de millorar-ne la seva qualitat.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quina sorpresa s&#8217;ha endut l&#8217;alumnat de 2n d&#8217;ESO A de l\u2019Escola Isabel de Villena d&#8217;Esplugues de Llobregat quan han aixecat una pedra de la riera i han vist com un munt de gambes d&#8217;aigua dol\u00e7a fugien en totes direccions! I \u00e9s que avui s&#8217;ho han passat d&#8217;all\u00f2 m\u00e9s b\u00e9 estudiant a fons l\u2019ecosistema de la [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":16685,"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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