{"id":59504,"date":"2020-07-24T00:51:00","date_gmt":"2020-07-23T22:51:00","guid":{"rendered":"https:\/\/www.sonnenseite.com\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/"},"modified":"2020-07-24T00:51:00","modified_gmt":"2020-07-23T22:51:00","slug":"when-will-polar-bear-populations-likely-start-collapsing","status":"publish","type":"post","link":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/","title":{"rendered":"When Will Polar Bear Populations Likely Start Collapsing?"},"content":{"rendered":"<p>Declines in global polar bear populations have long been predicted as sea ice loss continues. Published today in <em>Nature Climate Change<\/em>, &ldquo;<a href=\"https:\/\/www.nature.com\/articles\/s41558-020-0818-9\" target=\"_blank\" rel=\"noopener noreferrer\">Fasting Season Length Sets Temporal Limits for Global Polar Bear Persistence<\/a>&rdquo;  projects when polar bear populations in the Arctic will cross  thresholds of food deprivation that lead to rapid declines in  reproduction and survival.&nbsp;<\/p>\n<p> <!--more--> <\/p>\n<p>Polar Bears International and a team of scientists from leading universities report that for the first time, scientists have answered the critical question of when the persistence of polar bear populations across the Arctic will be threatened due to sea ice loss from global warming.&nbsp;The study calculates &ldquo;timelines of risk&rdquo; for different polar bear  demographics, exploring two alternative futures with different levels of  greenhouse gas emissions and atmospheric concentrations of CO2. If  business-as-usual greenhouse gas emissions continue, it&rsquo;s likely that  all but a few polar bear populations will collapse by 2100.<\/p>\n<p>&nbsp;<\/p>\n<p><iframe loading=\"lazy\" frameborder=\"0\" src=\"https:\/\/www.youtube.com\/embed\/gmrAiq_3uZM\" height=\"360\" width=\"100%\"><\/iframe><\/p>\n<p>&ldquo;Previously, we knew <em>that<\/em> polar bears would ultimately disappear unless we halt greenhouse gas rise. But knowing <em>when<\/em>  they will begin to disappear in different areas is critical for  informing management and policy&mdash;and inspiring action,&rdquo; said Dr. Steven  Amstrup, who conceived the project and is a coauthor on the study.  Amstrup is chief scientist of Polar Bears International&nbsp;and an adjunct  professor in the University of Wyoming Department of Zoology and  Physiology.&nbsp; &ldquo;We found that moderate emissions reductions may prolong  global persistence, but are not likely to prevent the extirpation of  several populations, emphasizing&nbsp;the urgency of more ambitious emissions  cuts.&rdquo;&nbsp;<\/p>\n<p>Polar bears require sea ice for capturing their seal prey. Due  to declining summer sea ice, many bears are forced onto land, or they  follow the remaining ice as it drifts over deep, unproductive waters. In  both cases, polar bears are largely food deprived. Prolonged fasting  periods have been linked to reduced body condition, reproduction, and  survival in some polar bear populations. Continued sea ice loss  ultimately threatens polar bear survival Arctic-wide. <em>When<\/em>  lowered ice availability will reach critical limits for polar bears in  different parts of their range had previously not been determined. This  is because data linking sea ice decline to reproduction and survival are  lacking for most of the 19 polar bear populations and cannot be  measured in advance for future low ice extremes.&nbsp;<\/p>\n<p>&ldquo;In this study, we flipped the focus so that future  reproduction and survival&mdash;the vital demographic parameters of  interest&mdash;become model outputs rather than required but unobtainable  inputs,&rdquo; added Dr. Amstrup. &ldquo;We now have an analytical basis for how  populations will begin to collapse and how much different age and sex  groups can endure.&rdquo;<\/p>\n<p>&ldquo;By estimating how thin and how fat polar bears can be, and  modeling their energy use, we were able to calculate the threshold  number of days that polar bears can fast before cub and\/or adult  survival rates begin to decline,&rdquo; said Dr. P&eacute;ter Moln&aacute;r, of the  University of Toronto, Scarborough, who built the energetics model and  is first author on the study.<\/p>\n<p>&ldquo;Intersecting these <em>fasting impact thresholds<\/em> with the  projected future number of days that sea ice will be absent, we were  able to project when fasting impact thresholds will be exceeded in  different parts of the Arctic,&rdquo; reported Dr. Cecilia Bitz, a climate  scientist with the University of Washington, Seattle. Dr. Bitz, second  author on the study, was one of the original developers of the Community  Earth Systems Model, used here to project the number of future ice-free  days where each polar bear population lives.<\/p>\n<p>The model&rsquo;s outcomes are consistent with previous projections  that polar bears are likely to persist to 2100 only in a few High Arctic  populations if we don&rsquo;t stop human-caused warming. By focusing on the  biological mechanisms determining how prolonged fasting impacts  reproduction and survival, we can now provide detailed timelines for  when and how different populations will be affected. The reliability of  the paper&rsquo;s projections is affirmed by noting that the models&rsquo;  projections captured demographic changes in populations where climate  change impacts are already evident.&nbsp;<\/p>\n<p>&ldquo;My colleagues&rsquo; approach to modeling the trajectory of the  various sub-populations of polar bears represents an innovative solution  to uncertainties resulting from previous work. They used first  principles of physiology to estimate the ability of polar bears to  withstand extended periods of fasting. This is an important tool for our  continued conservation efforts of this species,&rdquo; said University of  Wyoming professor, Merav Ben-David, who has been studying polar bears  with Dr. Amstrup for 20 years but was not involved in the current  project.<\/p>\n<p>&ldquo;Polar bears have long been considered messengers of the  climate change symptoms that will impact all life, including humans.&nbsp; We  know that floods, droughts, and wildfires will become more frequent and  severe as the world continues to warm, but timelines for such events  are hard to predict. &nbsp; The coronavirus pandemic is a reminder of how  vital it is for our governments to take the actions needed, even when  the timeline of the threat feels uncertain. Showing how imminent the  threat is for different polar bear populations is another reminder that  we must act now to head off the worst of future problems faced by us  all,&rdquo; said Dr. Amstrup.<\/p>\n<p>With business-as-usual greenhouse gas emissions, steeply declining reproduction&nbsp;and  survival will jeopardize persistence of all but a few high Arctic  subpopulations by 2100. Moderate emissions prolong persistence, but is  unlikely to prevent some population extirpations within this century.<\/p>\n<p>Ideally we would follow a different  scenario, not modeled here, where people come together and take swift,  bold action as a global community&mdash;to meet the goals set to during the  Paris Agreement, and keep global temperature rise below 2 degrees. This  is still an option, there is still time to act. Doing so, could preserve  polar bears over much of their current range <em>indefinitely.<\/em><\/p>\n<p><strong>About Polar Bears International<\/strong><\/p>\n<p>Polar Bears International&rsquo;s mission is to conserve polar bears  and the sea ice they depend on. Through media, science, and advocacy, we  work to inspire people to care about the Arctic, the threats to its  future, and the connection between this remote region and our global  climate. PBI is the only nonprofit organization dedicated solely to wild  polar bears and Arctic sea ice, and our staff includes scientists who  study wild polar bears. The organization is a recognized leader in polar  bear conservation. For more information, visit <a href=\"http:\/\/www.polarbearsinternational.org\/\">www.polarbearsinternational.org<\/a><\/p>\n<h5 class=\"green\">Source<\/h5>\n<p><a href=\"https:\/\/polarbearsinternational.org\/news\/article-research\/when-will-polar-bear-populations-likely-start-collapsing\/\" target=\"_blank\" rel=\"noopener noreferrer\">POLAR BEARS INTERNATIONAL 2020<\/a><\/p>\n<div class=\"shariff shariff-align-flex-start shariff-widget-align-flex-start\"><div class=\"ShariffHeadline\">Diese Meldung teilen<\/div><ul class=\"shariff-buttons theme-round orientation-horizontal buttonsize-medium\"><li class=\"shariff-button facebook shariff-nocustomcolor\" style=\"background-color:#4273c8;border-radius:1%\"><a href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https%3A%2F%2Fwww.sonnenseite.com%2Fen%2Fenvironment%2Fwhen-will-polar-bear-populations-likely-start-collapsing%2F\" title=\"Bei Facebook teilen\" aria-label=\"Bei Facebook teilen\" role=\"button\" rel=\"nofollow\" class=\"shariff-link\" style=\";border-radius:1%; background-color:#3b5998; color:#fff\" target=\"_blank\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 18 32\"><path fill=\"#3b5998\" d=\"M17.1 0.2v4.7h-2.8q-1.5 0-2.1 0.6t-0.5 1.9v3.4h5.2l-0.7 5.3h-4.5v13.6h-5.5v-13.6h-4.5v-5.3h4.5v-3.9q0-3.3 1.9-5.2t5-1.8q2.6 0 4.1 0.2z\"\/><\/svg><\/span><\/a><\/li><li class=\"shariff-button twitter shariff-nocustomcolor\" style=\"background-color:#595959;border-radius:1%\"><a href=\"https:\/\/twitter.com\/share?url=https%3A%2F%2Fwww.sonnenseite.com%2Fen%2Fenvironment%2Fwhen-will-polar-bear-populations-likely-start-collapsing%2F&text=When%20Will%20Polar%20Bear%20Populations%20Likely%20Start%20Collapsing%3F\" title=\"Bei X teilen\" aria-label=\"Bei X teilen\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\";border-radius:1%; background-color:#000; color:#fff\" target=\"_blank\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 24 24\"><path fill=\"#000\" d=\"M14.258 10.152L23.176 0h-2.113l-7.747 8.813L7.133 0H0l9.352 13.328L0 23.973h2.113l8.176-9.309 6.531 9.309h7.133zm-2.895 3.293l-.949-1.328L2.875 1.56h3.246l6.086 8.523.945 1.328 7.91 11.078h-3.246zm0 0\"\/><\/svg><\/span><\/a><\/li><li class=\"shariff-button xing shariff-nocustomcolor\" style=\"background-color:#29888a;border-radius:1%\"><a href=\"https:\/\/www.xing.com\/spi\/shares\/new?url=https%3A%2F%2Fwww.sonnenseite.com%2Fen%2Fenvironment%2Fwhen-will-polar-bear-populations-likely-start-collapsing%2F\" title=\"Bei XING teilen\" aria-label=\"Bei XING teilen\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\";border-radius:1%; background-color:#126567; color:#fff\" target=\"_blank\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 25 32\"><path fill=\"#126567\" d=\"M10.7 11.9q-0.2 0.3-4.6 8.2-0.5 0.8-1.2 0.8h-4.3q-0.4 0-0.5-0.3t0-0.6l4.5-8q0 0 0 0l-2.9-5q-0.2-0.4 0-0.7 0.2-0.3 0.5-0.3h4.3q0.7 0 1.2 0.8zM25.1 0.4q0.2 0.3 0 0.7l-9.4 16.7 6 11q0.2 0.4 0 0.6-0.2 0.3-0.6 0.3h-4.3q-0.7 0-1.2-0.8l-6-11.1q0.3-0.6 9.5-16.8 0.4-0.8 1.2-0.8h4.3q0.4 0 0.5 0.3z\"\/><\/svg><\/span><\/a><\/li><li class=\"shariff-button linkedin shariff-nocustomcolor\" style=\"background-color:#1488bf;border-radius:1%\"><a href=\"https:\/\/www.linkedin.com\/sharing\/share-offsite\/?url=https%3A%2F%2Fwww.sonnenseite.com%2Fen%2Fenvironment%2Fwhen-will-polar-bear-populations-likely-start-collapsing%2F\" title=\"Bei LinkedIn teilen\" aria-label=\"Bei LinkedIn teilen\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\";border-radius:1%; background-color:#0077b5; color:#fff\" target=\"_blank\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 27 32\"><path fill=\"#0077b5\" d=\"M6.2 11.2v17.7h-5.9v-17.7h5.9zM6.6 5.7q0 1.3-0.9 2.2t-2.4 0.9h0q-1.5 0-2.4-0.9t-0.9-2.2 0.9-2.2 2.4-0.9 2.4 0.9 0.9 2.2zM27.4 18.7v10.1h-5.9v-9.5q0-1.9-0.7-2.9t-2.3-1.1q-1.1 0-1.9 0.6t-1.2 1.5q-0.2 0.5-0.2 1.4v9.9h-5.9q0-7.1 0-11.6t0-5.3l0-0.9h5.9v2.6h0q0.4-0.6 0.7-1t1-0.9 1.6-0.8 2-0.3q3 0 4.9 2t1.9 6z\"\/><\/svg><\/span><\/a><\/li><li class=\"shariff-button printer shariff-nocustomcolor\" style=\"background-color:#a8a8a8;border-radius:1%\"><a href=\"javascript:window.print()\" title=\"drucken\" aria-label=\"drucken\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\";border-radius:1%; background-color:#999; color:#fff\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 30 32\"><path fill=\"#999\" d=\"M6.8 27.4h16v-4.6h-16v4.6zM6.8 16h16v-6.8h-2.8q-0.7 0-1.2-0.5t-0.5-1.2v-2.8h-11.4v11.4zM27.4 17.2q0-0.5-0.3-0.8t-0.8-0.4-0.8 0.4-0.3 0.8 0.3 0.8 0.8 0.3 0.8-0.3 0.3-0.8zM29.7 17.2v7.4q0 0.2-0.2 0.4t-0.4 0.2h-4v2.8q0 0.7-0.5 1.2t-1.2 0.5h-17.2q-0.7 0-1.2-0.5t-0.5-1.2v-2.8h-4q-0.2 0-0.4-0.2t-0.2-0.4v-7.4q0-1.4 1-2.4t2.4-1h1.2v-9.7q0-0.7 0.5-1.2t1.2-0.5h12q0.7 0 1.6 0.4t1.3 0.8l2.7 2.7q0.5 0.5 0.9 1.4t0.4 1.6v4.6h1.1q1.4 0 2.4 1t1 2.4z\"\/><\/svg><\/span><\/a><\/li><li class=\"shariff-button mailto shariff-nocustomcolor\" style=\"background-color:#a8a8a8;border-radius:1%\"><a href=\"mailto:?body=https%3A%2F%2Fwww.sonnenseite.com%2Fen%2Fenvironment%2Fwhen-will-polar-bear-populations-likely-start-collapsing%2F&subject=When%20Will%20Polar%20Bear%20Populations%20Likely%20Start%20Collapsing%3F\" title=\"Per E-Mail versenden\" aria-label=\"Per E-Mail versenden\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\";border-radius:1%; background-color:#999; color:#fff\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 32 32\"><path fill=\"#999\" d=\"M32 12.7v14.2q0 1.2-0.8 2t-2 0.9h-26.3q-1.2 0-2-0.9t-0.8-2v-14.2q0.8 0.9 1.8 1.6 6.5 4.4 8.9 6.1 1 0.8 1.6 1.2t1.7 0.9 2 0.4h0.1q0.9 0 2-0.4t1.7-0.9 1.6-1.2q3-2.2 8.9-6.1 1-0.7 1.8-1.6zM32 7.4q0 1.4-0.9 2.7t-2.2 2.2q-6.7 4.7-8.4 5.8-0.2 0.1-0.7 0.5t-1 0.7-0.9 0.6-1.1 0.5-0.9 0.2h-0.1q-0.4 0-0.9-0.2t-1.1-0.5-0.9-0.6-1-0.7-0.7-0.5q-1.6-1.1-4.7-3.2t-3.6-2.6q-1.1-0.7-2.1-2t-1-2.5q0-1.4 0.7-2.3t2.1-0.9h26.3q1.2 0 2 0.8t0.9 2z\"\/><\/svg><\/span><\/a><\/li><\/ul><\/div>","protected":false},"excerpt":{"rendered":"<p>Declines in global polar bear populations have long been predicted as sea ice loss continues. Published [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":59502,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[42],"tags":[],"class_list":["post-59504","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environment"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>When Will Polar Bear Populations Likely Start Collapsing? - Sonnenseite - \u00d6kologische Kommunikation mit Franz Alt<\/title>\n<meta name=\"description\" content=\"Declines in global polar bear populations have long been predicted as sea ice loss continues. Published today in Nature Climate Change, &ldquo;Fasting\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"When Will Polar Bear Populations Likely Start Collapsing? - Sonnenseite - \u00d6kologische Kommunikation mit Franz Alt\" \/>\n<meta property=\"og:description\" content=\"Declines in global polar bear populations have long been predicted as sea ice loss continues. Published today in Nature Climate Change, &ldquo;Fasting\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/\" \/>\n<meta property=\"og:site_name\" content=\"Sonnenseite\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/pages\/Franz-Alt-SONNENSEITECOM\/221072987903953?fref=ts\" \/>\n<meta property=\"article:published_time\" content=\"2020-07-23T22:51:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/07\/eisbaer_family_SURZ.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"770\" \/>\n\t<meta property=\"og:image:height\" content=\"420\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"sbade\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@franzalt\" \/>\n<meta name=\"twitter:site\" content=\"@franzalt\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"sbade\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/\"},\"author\":{\"name\":\"sbade\",\"@id\":\"https:\/\/www.sonnenseite.com\/en\/#\/schema\/person\/6df44691cd9a70d99e140e1116ee8771\"},\"headline\":\"When Will Polar Bear Populations Likely Start Collapsing?\",\"datePublished\":\"2020-07-23T22:51:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/\"},\"wordCount\":1109,\"publisher\":{\"@id\":\"https:\/\/www.sonnenseite.com\/en\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/07\/eisbaer_family_SURZ.jpg\",\"articleSection\":[\"Environment\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/\",\"url\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/\",\"name\":\"When Will Polar Bear Populations Likely Start Collapsing? - Sonnenseite - \u00d6kologische Kommunikation mit Franz Alt\",\"isPartOf\":{\"@id\":\"https:\/\/www.sonnenseite.com\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/07\/eisbaer_family_SURZ.jpg\",\"datePublished\":\"2020-07-23T22:51:00+00:00\",\"description\":\"Declines in global polar bear populations have long been predicted as sea ice loss continues. Published today in Nature Climate Change, &ldquo;Fasting\",\"breadcrumb\":{\"@id\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#primaryimage\",\"url\":\"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/07\/eisbaer_family_SURZ.jpg\",\"contentUrl\":\"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/07\/eisbaer_family_SURZ.jpg\",\"width\":770,\"height\":420,\"caption\":\"bigstock | SURZ | In a report published today in Nature Climate Change, scientists calculate &ldquo;timelines of risk&rdquo; for individual polar bear populations, exploring two alternative futures based on different levels of greenhouse gases.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Startseite\",\"item\":\"https:\/\/www.sonnenseite.com\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"When Will Polar Bear Populations Likely Start Collapsing?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.sonnenseite.com\/en\/#website\",\"url\":\"https:\/\/www.sonnenseite.com\/en\/\",\"name\":\"Sonnenseite\",\"description\":\"\u00d6kologische Kommunikation mit Franz Alt\",\"publisher\":{\"@id\":\"https:\/\/www.sonnenseite.com\/en\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.sonnenseite.com\/en\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.sonnenseite.com\/en\/#organization\",\"name\":\"Sonnenseite\",\"url\":\"https:\/\/www.sonnenseite.com\/en\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.sonnenseite.com\/en\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/05\/Sonnenseite_Logo.png\",\"contentUrl\":\"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/05\/Sonnenseite_Logo.png\",\"width\":377,\"height\":90,\"caption\":\"Sonnenseite\"},\"image\":{\"@id\":\"https:\/\/www.sonnenseite.com\/en\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/pages\/Franz-Alt-SONNENSEITECOM\/221072987903953?fref=ts\",\"https:\/\/x.com\/franzalt\",\"http:\/\/www.youtube.com\/results?search_query&amp;amp;quot;franz_alt&amp;amp;quot;&amp;amp;amp;amp;search_type&amp;amp;amp;amp;aq=f\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.sonnenseite.com\/en\/#\/schema\/person\/6df44691cd9a70d99e140e1116ee8771\",\"name\":\"sbade\",\"sameAs\":[\"https:\/\/www.sonnenseite.com\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"When Will Polar Bear Populations Likely Start Collapsing? - Sonnenseite - \u00d6kologische Kommunikation mit Franz Alt","description":"Declines in global polar bear populations have long been predicted as sea ice loss continues. Published today in Nature Climate Change, &ldquo;Fasting","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/","og_locale":"en_US","og_type":"article","og_title":"When Will Polar Bear Populations Likely Start Collapsing? - Sonnenseite - \u00d6kologische Kommunikation mit Franz Alt","og_description":"Declines in global polar bear populations have long been predicted as sea ice loss continues. Published today in Nature Climate Change, &ldquo;Fasting","og_url":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/","og_site_name":"Sonnenseite","article_publisher":"https:\/\/www.facebook.com\/pages\/Franz-Alt-SONNENSEITECOM\/221072987903953?fref=ts","article_published_time":"2020-07-23T22:51:00+00:00","og_image":[{"width":770,"height":420,"url":"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/07\/eisbaer_family_SURZ.jpg","type":"image\/jpeg"}],"author":"sbade","twitter_card":"summary_large_image","twitter_creator":"@franzalt","twitter_site":"@franzalt","twitter_misc":{"Written by":"sbade","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#article","isPartOf":{"@id":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/"},"author":{"name":"sbade","@id":"https:\/\/www.sonnenseite.com\/en\/#\/schema\/person\/6df44691cd9a70d99e140e1116ee8771"},"headline":"When Will Polar Bear Populations Likely Start Collapsing?","datePublished":"2020-07-23T22:51:00+00:00","mainEntityOfPage":{"@id":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/"},"wordCount":1109,"publisher":{"@id":"https:\/\/www.sonnenseite.com\/en\/#organization"},"image":{"@id":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#primaryimage"},"thumbnailUrl":"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/07\/eisbaer_family_SURZ.jpg","articleSection":["Environment"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/","url":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/","name":"When Will Polar Bear Populations Likely Start Collapsing? - Sonnenseite - \u00d6kologische Kommunikation mit Franz Alt","isPartOf":{"@id":"https:\/\/www.sonnenseite.com\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#primaryimage"},"image":{"@id":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#primaryimage"},"thumbnailUrl":"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/07\/eisbaer_family_SURZ.jpg","datePublished":"2020-07-23T22:51:00+00:00","description":"Declines in global polar bear populations have long been predicted as sea ice loss continues. Published today in Nature Climate Change, &ldquo;Fasting","breadcrumb":{"@id":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#primaryimage","url":"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/07\/eisbaer_family_SURZ.jpg","contentUrl":"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/07\/eisbaer_family_SURZ.jpg","width":770,"height":420,"caption":"bigstock | SURZ | In a report published today in Nature Climate Change, scientists calculate &ldquo;timelines of risk&rdquo; for individual polar bear populations, exploring two alternative futures based on different levels of greenhouse gases."},{"@type":"BreadcrumbList","@id":"https:\/\/www.sonnenseite.com\/en\/environment\/when-will-polar-bear-populations-likely-start-collapsing\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Startseite","item":"https:\/\/www.sonnenseite.com\/en\/"},{"@type":"ListItem","position":2,"name":"When Will Polar Bear Populations Likely Start Collapsing?"}]},{"@type":"WebSite","@id":"https:\/\/www.sonnenseite.com\/en\/#website","url":"https:\/\/www.sonnenseite.com\/en\/","name":"Sonnenseite","description":"\u00d6kologische Kommunikation mit Franz Alt","publisher":{"@id":"https:\/\/www.sonnenseite.com\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.sonnenseite.com\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.sonnenseite.com\/en\/#organization","name":"Sonnenseite","url":"https:\/\/www.sonnenseite.com\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.sonnenseite.com\/en\/#\/schema\/logo\/image\/","url":"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/05\/Sonnenseite_Logo.png","contentUrl":"https:\/\/www.sonnenseite.com\/wp-content\/uploads\/2020\/05\/Sonnenseite_Logo.png","width":377,"height":90,"caption":"Sonnenseite"},"image":{"@id":"https:\/\/www.sonnenseite.com\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/pages\/Franz-Alt-SONNENSEITECOM\/221072987903953?fref=ts","https:\/\/x.com\/franzalt","http:\/\/www.youtube.com\/results?search_query&amp;amp;quot;franz_alt&amp;amp;quot;&amp;amp;amp;amp;search_type&amp;amp;amp;amp;aq=f"]},{"@type":"Person","@id":"https:\/\/www.sonnenseite.com\/en\/#\/schema\/person\/6df44691cd9a70d99e140e1116ee8771","name":"sbade","sameAs":["https:\/\/www.sonnenseite.com"]}]}},"_links":{"self":[{"href":"https:\/\/www.sonnenseite.com\/en\/wp-json\/wp\/v2\/posts\/59504","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sonnenseite.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sonnenseite.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sonnenseite.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sonnenseite.com\/en\/wp-json\/wp\/v2\/comments?post=59504"}],"version-history":[{"count":0,"href":"https:\/\/www.sonnenseite.com\/en\/wp-json\/wp\/v2\/posts\/59504\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sonnenseite.com\/en\/wp-json\/wp\/v2\/media\/59502"}],"wp:attachment":[{"href":"https:\/\/www.sonnenseite.com\/en\/wp-json\/wp\/v2\/media?parent=59504"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sonnenseite.com\/en\/wp-json\/wp\/v2\/categories?post=59504"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sonnenseite.com\/en\/wp-json\/wp\/v2\/tags?post=59504"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}