{"id":16460,"date":"2015-12-03T13:56:50","date_gmt":"2015-12-03T12:56:50","guid":{"rendered":"https:\/\/cram.org\/ca\/?p=16460"},"modified":"2015-12-03T13:56:50","modified_gmt":"2015-12-03T12:56:50","slug":"efectes-del-canvi-climatic-que-no-thavien-explicat","status":"publish","type":"post","link":"https:\/\/cram.org\/ca\/efectes-del-canvi-climatic-que-no-thavien-explicat\/","title":{"rendered":"Efectes del canvi clim\u00e0tic que no t\u2019havien explicat"},"content":{"rendered":"

L\u2019acumulaci\u00f3 de gasos d\u2019efecte hivernacle a l\u2019atmosfera \u00e9s la principal causa del canvi clim\u00e0tic<\/strong>. Per\u00f2, sab\u00edeu que molts d\u2019aquest gasos, com el CO2, el met\u00e0 o el vapor d\u2019aigua, ja existien de forma natural abans que l\u2019home pobl\u00e9s el planeta i que s\u00f3n indispensables per a la vida? Han estat la ind\u00fastria, el transport i fins i tot l\u2019agricultura massiva els que han provocat l\u2019augment de la concentraci\u00f3 d\u2019aquests gasos i, conseq\u00fcentment, la radicalitzaci\u00f3 d’un fenomen natural: l\u2019efecte hivernacle. <\/strong><\/p>\n

[row]<\/p>\n

[column size=\u00bbone-half\u00bb]<\/p>\n

Tenint en compte que m\u00e9s del 70% de la superf\u00edcie del planeta Terra s\u00f3n mars i oceans, \u00e9s l\u00f2gic pensar que aquests ecosistemes estaran considerablement afectats per aquests canvis. Podem imaginar que, progressivament, la temperatura del mar augmentar\u00e0, que els pols s\u2019aniran desfent i que, en conseq\u00fc\u00e8ncia, el nivell del mar pujar\u00e0, per\u00f2 aix\u00f2 no acaba aqu\u00ed.<\/p>\n

L\u2019augment de CO2 a l\u2019atmosfera provoca tamb\u00e9 un augment de CO2 al mar i, en conseq\u00fc\u00e8ncia, la progressiva acidificaci\u00f3 de les aig\u00fces. D’altra banda, els canvis en la climatologia generaran variacions en els corrents marins que tindran unes conseq\u00fc\u00e8ncies descomunals. S\u00f3n molt\u00edssimes les esp\u00e8cies i cicles biol\u00f2gics que depenen dels corrents oce\u00e0nics, per la qual cosa preveure’n totes les repercussions \u00e9s gaireb\u00e9 impossible.<\/p>\n

[\/column]<\/p>\n

[column size=\u00bbone-half\u00bb]<\/p>\n

\n
\"Bleached-branching-coral\"<\/dt>\n
Bleached branching coral (Acropora sp.) at Heron Island, Great Barrier Reef (21st January 2005). Author: J. Roff<\/span><\/dd>\n<\/dl>\n

[\/column]<\/p>\n

[\/row]<\/p>\n

Moltes comunitats de vital import\u00e0ncia per al medi mar\u00ed, com podrien ser els esculls de corall a les zones tropicals o les praderies de faner\u00f2games marines<\/a> al Mediterrani, s\u00f3n extremadament sensibles a les variacions de temperatura de l\u2019aigua del mar. La desaparici\u00f3 d\u2019aquestes comunitats tindria importants conseq\u00fc\u00e8ncies tant ecol\u00f2giques (s\u00f3n zones amb una gran biodiversitat i important\u00edssimes fonts d’oxigen) com econ\u00f2miques (hi hauria un deteriorament paisatg\u00edstic per canvis en el perfil de les platges i un augment de la terbolesa de l\u2019aigua, aix\u00ed com una reducci\u00f3 de la pesca, ja que moltes esp\u00e8cies d\u2019inter\u00e8s comercial depenen d\u2019aquestes praderies).<\/p>\n

Segons dades de l\u2019Organitzaci\u00f3 de les Nacions Unides (ONU), una quarta part del CO2 que les activitats humanes alliberen anualment a l\u2019atmosfera \u00e9s absorbida pels oceans. De fet, s\u00f3n precisament comunitats aqu\u00e0tiques com les praderies de faner\u00f2games marines o els aiguamolls els qui actuen com a grans reserves de carboni, i poden arribar a emmagatzemar quantitats fins a cinc vegades superiors a les dels boscos tropicals.<\/p>\n

Aix\u00ed doncs, els nostres mars i oceans no nom\u00e9s patiran incalculables conseq\u00fc\u00e8ncies si no alentim el canvi clim\u00e0tic, sin\u00f3 que tenir-ne cura i conservar-los \u00e9s indispensable per controlar-lo.<\/p>\n

[blockquote align=\u00bb\u00bb]<\/p>\n

Si voleu con\u00e8ixer amb m\u00e9s detall les conseq\u00fc\u00e8ncies del canvi clim\u00e0tic al Mediterrani i el rol que juguen al nostre mar comunitats com les praderies de Posidonia oceanica<\/em>, podeu assistir al curs dedicat a l\u2019estudi de la diversitat i de les amenaces que pateixen els fons marins<\/a>, que impartirem a la Fundaci\u00f3 CRAM el cap de setmana del 12 i 13 de desembre.<\/h2>\n

[\/blockquote]<\/p>\n

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

L\u2019acumulaci\u00f3 de gasos d\u2019efecte hivernacle a l\u2019atmosfera \u00e9s la principal causa del canvi clim\u00e0tic. Per\u00f2, sab\u00edeu que molts d\u2019aquest gasos, com el CO2, el met\u00e0 o el vapor d\u2019aigua, ja existien de forma natural abans que l\u2019home pobl\u00e9s el planeta i que s\u00f3n indispensables per a la vida? Han estat la ind\u00fastria, el transport […]<\/p>\n","protected":false},"author":1,"featured_media":16446,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[71],"tags":[],"class_list":["post-16460","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticies"],"yoast_head":"\nEfectes del canvi clim\u00e0tic que no t\u2019havien explicat - CRAM<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cram.org\/ca\/efectes-del-canvi-climatic-que-no-thavien-explicat\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Efectes del canvi clim\u00e0tic que no t\u2019havien explicat - CRAM\" \/>\n<meta property=\"og:description\" content=\"L\u2019acumulaci\u00f3 de gasos d\u2019efecte hivernacle a l\u2019atmosfera \u00e9s la principal causa del canvi clim\u00e0tic. Per\u00f2, sab\u00edeu que molts d\u2019aquest gasos, com el CO2, el met\u00e0 o el vapor d\u2019aigua, ja existien de forma natural abans que l\u2019home pobl\u00e9s el planeta i que s\u00f3n indispensables per a la vida? 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