{"id":29095,"date":"2017-01-08T08:07:08","date_gmt":"2017-01-08T14:07:08","guid":{"rendered":"https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/?p=29095"},"modified":"2017-01-06T19:08:03","modified_gmt":"2017-01-07T01:08:03","slug":"29095","status":"publish","type":"post","link":"https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/historico\/29095","title":{"rendered":"Contaminantes qu\u00edmicos, otra amenaza para los osos polares"},"content":{"rendered":"<p style=\"text-align: justify;\">Adem\u00e1s de estar amenazados por el cambio clim\u00e1tico, los osos polares, grandes carn\u00edvoros del \u00c1rtico, son v\u00edctimas de los contaminantes qu\u00edmicos utilizados en la agricultura y la industria, seg\u00fan un estudio.<\/p>\n<p style=\"text-align: justify;\">Estos contaminantes representan un riesgo para su salud 100 veces superior a lo considerado aceptable para los osos adultos y mil veces superior para los peque\u00f1os.<\/p>\n<p style=\"text-align: justify;\">&#8220;Se trata del primer estudio que cuantifica el riesgo que representa para el ecosistema \u00e1rtico los Contaminantes Org\u00e1nicos Persistentes (COP)&#8221;, subraya su principal autora, Sara Villa, toxic\u00f3loga de la Universidad de Bicocca, en Mil\u00e1n.<\/p>\n<figure id=\"attachment_29103\" aria-describedby=\"caption-attachment-29103\" style=\"width: 660px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-29103\" src=\"https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/2017\/01\/885fc976e41a6e4eeb7c774c78cb85584b8e4ac7.jpg\" alt=\"AFP\/Archivos \/ Paul J. RichardsUn oso polar camina sobre la tundra helada en la bah\u00eda de Hudson, a las afueras de Churchill (Canad\u00e1), el 14 de noviembre de 2007\" width=\"660\" height=\"371\" srcset=\"https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/sites\/2\/2017\/01\/885fc976e41a6e4eeb7c774c78cb85584b8e4ac7.jpg 660w, https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/sites\/2\/2017\/01\/885fc976e41a6e4eeb7c774c78cb85584b8e4ac7.jpg?resize=300,169 300w, https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/sites\/2\/2017\/01\/885fc976e41a6e4eeb7c774c78cb85584b8e4ac7.jpg?resize=276,154 276w, https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/sites\/2\/2017\/01\/885fc976e41a6e4eeb7c774c78cb85584b8e4ac7.jpg?resize=260,146 260w, https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/sites\/2\/2017\/01\/885fc976e41a6e4eeb7c774c78cb85584b8e4ac7.jpg?resize=150,84 150w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\" \/><figcaption id=\"caption-attachment-29103\" class=\"wp-caption-text\">AFP\/Archivos \/ Paul J. RichardsUn oso polar camina sobre la tundra helada en la bah\u00eda de Hudson, a las afueras de Churchill (Canad\u00e1), el 14 de noviembre de 2007<\/figcaption><\/figure>\n<p style=\"text-align: justify;\">Los investigadores compilaron 40 a\u00f1os de trabajos sobre la exposici\u00f3n de los osos, pero tambi\u00e9n de las focas y el bacalao, sobre todo en la regi\u00f3n que abarca desde el archipi\u00e9lago \u00e1rtico de Svalbard hasta Alaska.<\/p>\n<p style=\"text-align: justify;\">&#8220;Las concentraciones de COP son sorprendentemente m\u00e1s elevadas entre los osos polares&#8221;, 100 veces m\u00e1s que en el caso de las focas, subraya el estudio, publicado el jueves en la revista Environmental Toxicology and Chemistry.<\/p>\n<p style=\"text-align: justify;\">Utilizados en la agricultura y la industria, los COP, unos contaminantes que perturban el sistema endocrino, persisten durante d\u00e9cadas en la naturaleza y se concentran remontando la cadena alimenticia: pasan, por ejemplo, del plancton a los peces, luego a las focas y finalmente a los osos, acumul\u00e1ndose hasta alcanzar dosis muy t\u00f3xicas.<\/p>\n<p style=\"text-align: justify;\">Los osos m\u00e1s peque\u00f1os est\u00e1n muy expuestos, sobre todo a trav\u00e9s de la leche contaminada de su madre.<br \/>\nAunque algunos COP fueron prohibidos en los a\u00f1os 1970 y luego fueron reemplazados por otros agentes contaminantes, seg\u00fan los investigadores.<\/p>\n<figure id=\"attachment_29104\" aria-describedby=\"caption-attachment-29104\" style=\"width: 660px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-29104\" src=\"https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/2017\/01\/943853199a486b045e20e0861638fc0fe6e2d978.jpg\" alt=\"AFP \/ -, A.Leung\/G.Roma\/J.SaekiPrincipales amenazas para los osos polares y localizaci\u00f3n de su poblaci\u00f3n en el \u00c1rtico\" width=\"660\" height=\"371\" srcset=\"https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/sites\/2\/2017\/01\/943853199a486b045e20e0861638fc0fe6e2d978.jpg 660w, https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/sites\/2\/2017\/01\/943853199a486b045e20e0861638fc0fe6e2d978.jpg?resize=300,169 300w, https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/sites\/2\/2017\/01\/943853199a486b045e20e0861638fc0fe6e2d978.jpg?resize=276,154 276w, https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/sites\/2\/2017\/01\/943853199a486b045e20e0861638fc0fe6e2d978.jpg?resize=260,146 260w, https:\/\/prensalibre-com-develop.go-vip.co\/guatevision\/wp-content\/uploads\/sites\/2\/2017\/01\/943853199a486b045e20e0861638fc0fe6e2d978.jpg?resize=150,84 150w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\" \/><figcaption id=\"caption-attachment-29104\" class=\"wp-caption-text\">AFP \/ -, A.Leung\/G.Roma\/J.SaekiPrincipales amenazas para los osos polares y localizaci\u00f3n de su poblaci\u00f3n en el \u00c1rtico<\/figcaption><\/figure>\n<p style=\"text-align: justify;\">Estas sustancias se utilizan sobre todo para impermeabilizar papel, tejidos, muebles, y evitar las manchas de agua o de grasa.<\/p>\n<p style=\"text-align: justify;\">Esta amenaza se suma a las que ya pesan sobre el oso polar, un tercio de cuya poblaci\u00f3n est\u00e1 abocada a desaparecer de aqu\u00ed a mediados del siglo. Actualmente, existen alrededor de 26.000 ejemplares.<\/p>\n<p style=\"text-align: justify;\">El problema m\u00e1s importante es el deshielo de la banquisa, donde el oso se procura su alimento principal, las focas.<\/p>\n<p style=\"text-align: justify;\">En el \u00c1rtico, donde la temperatura aumenta dos veces m\u00e1s r\u00e1pido que en el resto del planeta, el calentamiento clim\u00e1tico podr\u00eda generar veranos sin hielo de aqu\u00ed a unos 20 a\u00f1os, estiman los cient\u00edficos.<\/p>\n<ul>\n<li>\n<h4>Con informaci\u00f3n de AFP.<\/h4>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Estos contaminantes representan un riesgo para su salud 100 veces superior a lo considerado aceptable para los osos adultos y mil veces superior para los peque\u00f1os.<\/p>\n","protected":false},"author":218,"featured_media":29103,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[],"etiqueta":[],"class_list":["post-29095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Contaminantes qu\u00edmicos, otra amenaza para los osos polares<\/title>\n<meta name=\"description\" content=\"Estos contaminantes representan un riesgo para su salud 100 veces 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