{"id":2439,"date":"2018-12-14T14:22:23","date_gmt":"2018-12-14T13:22:23","guid":{"rendered":"http:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/?p=2439"},"modified":"2018-12-14T14:24:20","modified_gmt":"2018-12-14T13:24:20","slug":"que-amaga-el-gel-mari-antartic","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/general\/que-amaga-el-gel-mari-antartic\/","title":{"rendered":"Qu\u00e8 amaga el gel mar\u00ed ant\u00e0rtic?"},"content":{"rendered":"

Fa uns dies vam gaudir de la visita de\u00a0Josep Maria Gili<\/strong><\/span>, ec\u00f2leg mar\u00ed de renom mundial i investigador del\u00a0CISG. Aquesta visita s’emmarca dins del projecte\u00a0Expedici\u00f3 a l’Ant\u00e0rtida<\/strong><\/span>\u00a0que estem realitzant a l’institut amb l’alumnat de primer de\u00a0l’ESO\u00a0des de principi de curs. No obstant aix\u00f2, atesa la rellev\u00e0ncia i la import\u00e0ncia d’aquesta confer\u00e8ncia tamb\u00e9 hi va assistir l’alumnat de batxillerat que est\u00e0 cursant l’especialitat de ci\u00e8ncies de la salut.<\/p>\n

Gili va compartir amb nosaltres un trosset de l\u2019Ant\u00e0rtida. Junts vam submergir-nos en la passi\u00f3 per aquest continent inexpugnable, sotm\u00e8s a forts vents (de fins a\u00a0250\u202fkm\/h) que poden aixecar camions i a temperatures de fins a – 89\u202f\u00b0C. Ens va explicar la rigorositat de l\u2019hivern Ant\u00e0rtic, que duplica l\u2019extensi\u00f3 del continent durant 6 mesos, cobrint de gel mar\u00ed una superf\u00edcie nova tan incommensurable que \u00e9s assimilable al continent Europeu.<\/p>\n

Tot i aquestes condicions extremes tan desfavorables, la biodiversitat a l’Ant\u00e0rtida aflora\u00a0com si es tract\u00e9s d’un bosc tropical, estimant que hi coexisteixen d’unes 4.500 a unes 7.500 esp\u00e8cies, moltes de les quals seran descobertes per la ci\u00e8ncia en els\u00a0pr\u00f2xims 20 anys.<\/p>\n

Com s\u2019ho fa la vida per prosperar? Gili ens ha donat les eines per respondre a aquesta gran inc\u00f2gnita, mostrant-nos que el gegantisme, la longevitat i l\u2019antiguitat s\u00f3n caracter\u00edstiques \u00faniques dels \u00e9ssers vius ant\u00e0rtics. Hem vist en directe com \u00e9s una pu\u00e7a d\u2019aigua gegant o un amf\u00edpode ant\u00e0rtic, una gorg\u00f2nia de 1.100 anys i una esp\u00e8cie de corall tou que es considerava extingit i que va ser redescobert a l\u2019Ant\u00e0rtida en\u00a0immenses\u00a0praderies que poblen el seu fons mar\u00ed.<\/p>\n

Fins i tot hem pogut tocar gel ant\u00e0rtic, d\u2019un color i una textura untuosa i ens ha impactat que pugui guardar la vida en els seus canals, durant el rigor\u00f3s hivern. El fitopl\u00e0ncton hi subsisteix, creixent\u00a0fins a\u00a0la primavera seg\u00fcent per despr\u00e9s alimentar el\u00a0krill\u00a0que filtra\u00a01l\u00a0d\u2019aquestes\u00a0microalgues\u00a0en 1 minut. El\u00a0krill\u00a0empaqueta la mat\u00e8ria sobrant en pelets\u00a0fecals que adoben el fons mar\u00ed i el nodreixen. \u00c9s per tot aix\u00f2 que els ecosistemes ant\u00e0rtics estan plens de vida!<\/p>\n

L\u2019Ant\u00e0rtida \u00e9s font de nous interrogants cient\u00edfics, com el cristall de s\u00edlice que forma les cabelleres de les esponges marines que sembla ser un experiment en curs i que algunes d’aquestes han aprofitat, emprant-lo com a tija per enlairar-se sobre el fons mar\u00ed i ser les primeres\u00a0a\u00a0aprofitar els nutrients que cauen del fons.<\/p>\n

Tots aquests exemples i exemplars, els hem pogut tocar i veure en directe, a trav\u00e9s de mostres portades pels investigadors, en les diferents campanyes ant\u00e0rtiques.\u00a0Krill, paquets fecals, mostres de fitopl\u00e0ncton del gel ant\u00e0rtic, peixos de gel, estrelles de mar gegants\u2026 Els\u00a0hem gaudit a les taules de la nostra Biblioteca\u00a0com si es tract\u00e9s d’una expedici\u00f3 cient\u00edfica.<\/p>\n

La nostra experi\u00e8ncia ha finalitzat quan Gili ha compartit amb nosaltres el descobriment d\u2019una esponja nova per la ci\u00e8ncia, el nom cient\u00edfic de la qual va ser dedicat a tots els fills dels cient\u00edfics i cient\u00edfiques que esperen que els seus progenitors retornin de les campanyes d\u2019investigaci\u00f3 i, en general, a totes les noves generacions de futurs investigadors i amants de la natura. Parlem de l’esp\u00e8cie:\u00a0<\/em>Stylicordia\u00a0chupa\u00a0chups<\/strong><\/em>, un gran exemple de ci\u00e8ncia i humanitat per finalitzar una gran experi\u00e8ncia ant\u00e0rtica.<\/p>\n

En nom de l’alumnat i el professorat de l’institut li donem les gr\u00e0cies pel seu temps, per apropar-nos l’Ant\u00e0rtida i ajudar-nos a sentir-la m\u00e9s a prop!<\/strong><\/p>\n

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 <\/p>\n","protected":false},"excerpt":{"rendered":"

Fa uns dies vam gaudir de la visita de\u00a0Josep Maria Gili, ec\u00f2leg mar\u00ed de renom mundial i investigador del\u00a0CISG. Aquesta visita s’emmarca dins del projecte\u00a0Expedici\u00f3 a l’Ant\u00e0rtida\u00a0que estem realitzant a l’institut amb l’alumnat de primer de\u00a0l’ESO\u00a0des de principi de curs. No obstant aix\u00f2, atesa la rellev\u00e0ncia i la import\u00e0ncia d’aquesta confer\u00e8ncia tamb\u00e9 hi va assistir […]<\/p>\n","protected":false},"author":1,"featured_media":2461,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[8,128,4,1,29,164],"tags":[],"class_list":["post-2439","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-batxillerat","category-ciencies-naturals","category-eso-1","category-general","category-portada","category-projectes-interdisciplinaris"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/posts\/2439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/comments?post=2439"}],"version-history":[{"count":3,"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/posts\/2439\/revisions"}],"predecessor-version":[{"id":2476,"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/posts\/2439\/revisions\/2476"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/media\/2461"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/media?parent=2439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/categories?post=2439"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ies-rubio-hospitalet\/wp-json\/wp\/v2\/tags?post=2439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}