{"id":41925,"date":"2021-11-05T12:12:34","date_gmt":"2021-11-05T15:12:34","guid":{"rendered":"https:\/\/explora.cl\/coquimbo\/?p=41925"},"modified":"2021-11-17T16:11:00","modified_gmt":"2021-11-17T19:11:00","slug":"dr-marcelo-rivadeneira-entre-el-15-y-el-33-de-las-especies-marinas-podrian-estar-en-riesgo-de-desaparecer-de-la-antartica","status":"publish","type":"post","link":"https:\/\/explora.cl\/coquimbo\/dr-marcelo-rivadeneira-entre-el-15-y-el-33-de-las-especies-marinas-podrian-estar-en-riesgo-de-desaparecer-de-la-antartica\/","title":{"rendered":"Dr. Marcelo Rivadeneira: \u201cEntre el 15% y el 33% de las especies marinas podr\u00edan estar en riesgo de desaparecer de la Ant\u00e1rtica\u201d"},"content":{"rendered":"<p style=\"text-align: justify\"><em>En el marco de la iniciativa Ciencia Abierta, estuvimos conversando con el Dr. Marcelo Rivadeneira, Bi\u00f3logo Marino e Investigador Titular del Centro de Estudios Avanzados en Zonas \u00c1ridas (CEAZA), sobre cambio clim\u00e1tico y la amenaza de extinci\u00f3n de vida marina ant\u00e1rtica, y nos cont\u00f3 resultados preliminares de investigaciones, financiadas por el Instituto Ant\u00e1rtico Chileno.<\/em><\/p>\n<p style=\"text-align: justify\">El cambio clim\u00e1tico es una tem\u00e1tica que ya hemos escuchado m\u00faltiples veces, pero hay ciertos aspectos que no conocemos com\u00fanmente, como por ejemplo c\u00f3mo afecta este al sistema marino. \u201cDesde hace un par de d\u00e9cadas los cient\u00edficos han estado preocupados por el cambio clim\u00e1tico y han tratado de generar modelos predictivos de c\u00f3mo va a cambiar el ambiente de aqu\u00ed a pr\u00f3ximas d\u00e9cadas\u201d se\u00f1al\u00f3 el Bi\u00f3logo Marino.<\/p>\n<p style=\"text-align: justify\">Hay modelos que son m\u00e1s moderados y otros m\u00e1s pesimistas en cuanto a c\u00f3mo va a cambiar la temperatura del planeta y c\u00f3mo afectar\u00eda esto en nuestras vidas. \u201cEl modelo m\u00e1s pesimista indica un cambio de m\u00e1s o menos 4 grados de incremento en la temperatura y eso supone condiciones que el planeta no ha experimentado desde hace por lo menos 3 millones de a\u00f1os\u201d.<\/p>\n<p style=\"text-align: justify\">Asimismo, a\u00f1adi\u00f3 que hay modelos que plantean que, al a\u00f1o 2200 aproximadamente, si esta situaci\u00f3n continua \u201cel planeta podr\u00eda entrar en una temperatura que no ha experimentado hace decenas de millones de a\u00f1os y si eso sucediera, se derretir\u00edan por completo los casquetes polares del \u00c1rtico y ser\u00eda catastr\u00f3fico porque al derretirse, subir\u00eda el nivel del mar de todo el planeta por lo menos unos 50 metros, muchas zonas quedar\u00edan completamente sumergidas\u201d.<\/p>\n<p style=\"text-align: justify\">Pero \u00bfC\u00f3mo va incidir en la diversidad marina el aumento de la temperatura? En palabras del experto dependiendo del modelo (optimista o pesimista) se pueden ver que cambios podr\u00eda haber en la riqueza de especies que habitan el fondo marino ant\u00e1rtico. \u201clo que vemos es que hay puntos donde va a subir la riqueza de especies y puntos donde bajar\u00e1, as\u00ed que, si bien en t\u00e9rminos promedio la riqueza de especies deber\u00eda mantenerse estable, van haber si o si escenarios donde subir\u00e1 y otros donde bajar\u00e1 y esto se ve en ambos escenarios clim\u00e1ticos que es lo m\u00e1s llamativo\u201d Marcelo agreg\u00f3 que ese cambio no va a ser homog\u00e9neo a trav\u00e9s del oc\u00e9ano, \u201cvan haber zonas que se van a experimentar m\u00e1s p\u00e9rdidas\u201d.<\/p>\n<p style=\"text-align: justify\">Es as\u00ed como de acuerdo a las conclusiones realizadas por el estudio, entre ellas mencionan que van haber ganadores y perdedores en cuanto a la distribuci\u00f3n de especies. Igualmente, entre el 15% y el 33% de las especies marinas podr\u00edan estar en riesgo de desaparecer de la Ant\u00e1rtica, aunque este riesgo es variable entre las diferentes especies. Finalmente se esperan dr\u00e1sticos cambios en la riqueza de especies alrededor de la zona.<\/p>\n<p style=\"text-align: justify\">Si quieres ver la explicaci\u00f3n completa realizada por el Dr. Marcelo Rivadeneira, puedes visualizarla aqu\u00ed:<\/p>\n<p><iframe title=\"Cambio Clim\u00e1tico y la amenaza de extinci\u00f3n de la vida marina ant\u00e1rtica.\" width=\"1180\" height=\"664\" src=\"https:\/\/www.youtube.com\/embed\/JQNVLB4FyO4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dr. Marcelo Rivadeneira: \u201cEntre el 15% y el 33% de las especies marinas podr\u00edan estar en riesgo de desaparecer de la Ant\u00e1rtica\u201d<\/p>\n","protected":false},"author":21,"featured_media":41926,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[143,4],"tags":[],"class_list":["post-41925","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lugar-8","category-noticias"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dr. Marcelo Rivadeneira: \u201cEntre el 15% y el 33% de las especies marinas podr\u00edan estar en riesgo de desaparecer de la Ant\u00e1rtica\u201d - Coquimbo<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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