{"id":420883,"date":"2026-01-20T06:48:07","date_gmt":"2026-01-20T06:48:07","guid":{"rendered":"https:\/\/www.newsbeep.com\/ca\/420883\/"},"modified":"2026-01-20T06:48:07","modified_gmt":"2026-01-20T06:48:07","slug":"antarctic-penguins-have-radically-shifted-their-breeding-season-seemingly-in-response-to-climate-change-antarctica","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/ca\/420883\/","title":{"rendered":"Antarctic penguins have radically shifted their breeding season \u2013 seemingly in response to climate change | Antarctica"},"content":{"rendered":"

Penguins in Antarctica<\/a> have radically shifted their breeding season, apparently as a response to climate change, research has found.<\/p>\n

Dramatic shifts in behaviour were revealed by a decade-long study led by Penguin<\/a> Watch at the University of Oxford and Oxford Brookes University, with some penguins\u2019 breeding period moving forward by more than three weeks.<\/p>\n

The changes threaten to disrupt penguins\u2019 access to food, increasing concerns for their survival. \u201cWe are very concerned because these penguins are advancing their season so much, and penguins are now breeding earlier than in any known records,\u201d said the report\u2019s lead author, Dr Ignacio Juarez Mart\u00ednez.<\/p>\n

\u201cThe changes are happening so fast that the penguins could end up breeding at times when their prey is not available yet. This could result in a lack of food for the penguin chicks in the first weeks of their life, which could be fatal. Even if the penguins could match their prey\u2019s behaviour, we can\u2019t expect them to keep this pace up much longer.\u201d<\/p>\n

The researchers examined changes in the timing of penguin breeding between 2012 and 2022, specifically their \u201csettlement\u201d at a colony \u2013 the first date at which penguins continuously occupied a nesting zone. Three species \u2013 Ad\u00e9lie (Pygoscelis adeliae), chinstrap (P antarcticus) and gentoo (P papua) \u2013 were studied, with colony sizes ranging from a dozen nests up to hundreds of thousands of nests.<\/p>\n

A chinstrap penguin with its chick. Photograph: Ignacio Juarez Martinez<\/p>\n

The scientists gathered evidence from 77 time-lapse cameras positioned around 37 colonies in Antarctica and some sub-Antarctic islands. Every time a camera took a picture, it also recorded the air temperature.<\/p>\n

The results, published on Tuesday in the Journal of Animal Ecology, show that the timing of the breeding season for all three species advanced at record rates.<\/p>\n

Gentoo penguins showed the greatest change, with an average advance of 13 days over the decade and up to 24 days in some gentoo colonies. This represents the fastest change in phenology (timing of breeding) recorded in any bird, and possibly any vertebrate, to date. Ad\u00e9lie and chinstrap penguins also advanced their breeding by an average of 10 days.<\/p>\n

Such drastic changes also threaten to increase competition between the region\u2019s penguin species, with clear \u201cwinners\u201d and \u201closers\u201d expected.<\/p>\n

\u201cGentoos are a more temperate species and are already benefiting from the milder conditions that climate change is bringing to Antarctica,\u201d said Juarez. \u201cThey\u2019re already expanding their colonies throughout the peninsula and growing their numbers in colonies that were already established, while Ad\u00e9lies and chinstraps are both declining throughout the Antarctic peninsula.<\/p>\n

\u201cA scenario of increased competition would only exacerbate this. With food, gentoos are foraging generalists, meaning they can switch from krill to fish, so they would be less affected in low-krill years, while the others are krill specialists.\u201d<\/p>\n

The shifting breeding periods could also result in the penguins fighting for space and nesting sites. \u201cPart of the reason why we see the three species living together in the Antarctic peninsula is because of their traditionally staggered reproduction, with Ad\u00e9lies and chinstraps breeding first and gentoos breeding slightly later,\u201d Juarez said.<\/p>\n

The three have managed to share space and minimise competition also because of differences in hunting depths and sea-ice conditions. Increased competition for food, other resources and snow-free nesting space would make raising chicks more difficult. Juarez said: \u201cWe\u2019ve already seen gentoos take nests that were previously occupied by Ad\u00e9lies or chinstraps.\u201d<\/p>\n

It is unclear what the specific mechanism is that is moving the penguins\u2019 breeding dates forward \u2013 they could be prompted by warmer temperatures (as many animals and plants are), by the earlier breaking of the ice, the earlier melting of the snow, the earlier phytoplankton blooms or other factors.<\/p>\n

Penguins play a key role in Antarctic food chains, including bringing nutrients from deep water up to the surface, which is vital to algae being able to complete their photosynthesis. Scientists are anxious that losing species will increase the risk of broad ecosystem collapse.<\/p>\n

\u201cChinstrap and Ad\u00e9lie colonies are, unfortunately, in clear decline<\/a> throughout the area and there\u2019s no reason to believe this is going to reverse anytime soon,\u201d said Juarez. \u201cEmperor penguins also breed there and also look like they are going extinct<\/a>. We want to preserve penguin diversity in Antarctica at all costs. The Antarctic ecosystem is a network with very few links \u2013 losing several species of penguins before the end of the century, as models predict, could be a fatal blow to its functioning and its resilience.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"Penguins in Antarctica have radically shifted their breeding season, apparently as a response to climate change, research has…\n","protected":false},"author":2,"featured_media":420884,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[49,48,295,66],"class_list":{"0":"post-420883","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-environment","8":"tag-ca","9":"tag-canada","10":"tag-environment","11":"tag-science"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/420883","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/comments?post=420883"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/420883\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media\/420884"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media?parent=420883"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/categories?post=420883"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/tags?post=420883"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}