![\"Why](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2026\/10\/aurochs-in-scandinavia-1.jpg\")
<\/a>Aurochs skull from Scania from the Biological Museum at Lund University. Credit: Lucas G\u00f6l\u00e9n<\/p>\nAn international team studied ancient DNA from aurochs bones<\/a>. The bones came from bogs and settlement sites in southern Sweden and Denmark. The researchers also tracked how many radiocarbon-dated specimens and bones turned up in each period.<\/p>\n They compared the ages of bones across archaeological sites too. Then they matched all of this against regional records of past climate, plants and human activity. Population modeling added a final check.<\/p>\n Aurochs reached Scandinavia<\/a> about 11,700 years ago, after the last Ice Age<\/a> ended. They came from a refuge in Western Europe. The trip cost them. The DNA shows a sharp population bottleneck during the move north. Genetic diversity dropped as animals spread from mainland Europe through Jutland, then fell again across Zealand and Scania.<\/p>\n Less diversity means more inbreeding. Over time, herds grew less able to handle stress. Mikkel-Holger Sinding of the University of Copenhagen, a senior author, calls this a textbook case of a bottleneck.<\/p>\n Scientists once thought the Scandinavian herd was cut off around 10,000 years ago. The new genetic evidence says no. Contact with the main European population went on longer. Isolation came about 8,000 years ago, when rising seas flooded the land bridge to the continent and formed the Danish-Swedish straits.<\/p>\n Humans were hunting hard at the same time. The population model shows a classic boom and bust. Numbers grew for a stretch, then fell steeply and fast. The drop lines up with more settlements, more hunting and heavier use of local resources. Aurochs disappeared from the Danish island of Zealand entirely. Sweden\u2019s population crashed.<\/p>\n A small group held on in southern Sweden<\/a> until at least 6,500 years ago. Forests kept spreading, yet the animals survived in refuges, mostly in places hunters avoided. Then conditions changed again. Open land gave way to dense forest, and grazing got harder to find. The stress finished what hunting started.<\/p>\n The team concludes no single cause ended the Scandinavian aurochs. Low genetic diversity, habitat loss and fragmentation, and long hunting pressure worked together. Genetic decline alone didn\u2019t kill them, but weakened herds struggled against everything else.<\/p>\n The findings matter for wildlife work today. Lead author Erika Rosengren, a doctoral student at Lund University, says ancient cases like this show which species suffer most and how people began shaping their surroundings.<\/p>\n Species rarely disappear from one factor, she says. Conservation plans need to address several pressures at once. She also argues for ecological corridors linking habitats instead of isolated reserves. The study shows the worth of mixing DNA research, archaeology and paleoecology.<\/p>\n Publication: Rosengren, E., Rossi, C., Magnell, O., Hallgren, F., Ekstr\u00f6m, J., Mostadius, M., \u2026 Sinding, M.-H. S. (2026). The immigration history and extinction dynamics of the Scandinavian aurochs ( Bos primigenius ). The Holocene, (09596836261477271). doi:10.1177\/09596836261477271<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Aurochs were the wild ancestors of modern cattle. They once roamed Europe, Asia and northern Africa. Today they\u2019re…\n","protected":false},"author":2,"featured_media":870284,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[82366,138219,366857,366858,79,5666],"class_list":["post-870283","post","type-post","status-publish","format-standard","has-post-thumbnail","category-science","tag-archaeogenetics","tag-holocene","tag-radiocarbon","tag-scandinavian-archaeology","tag-science","tag-zooarchaeology"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/870283","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=870283"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/870283\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/870284"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=870283"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=870283"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=870283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/a>Reconstruction of an aurochs. Credit: Erika Rosengren<\/p>\n<\/a>Lead author Erika Rosengren with a mounted aurochs skeleton from the Biological Museum at Lund University. Credit: Gunnar Menander<\/p>\n