研究：海冰融化促北極熊近親繁殖挪威群島20年間遺傳多樣性少10% - 立雍科技實業有限公司｜膠合棧板｜護角紙｜紙棧板｜木棧板｜塑膠棧板

跳至主要內容

Home
About Lion
Products
News
Certificates
- Patents
- Certificate of Analysis
Contact
Members

Home
About Lion
Products
News
Certificates
- Patents
- Certificate of Analysis
Contact
Members

English

English 繁體中文简体中文

Article classification

Environmental protection regulations
Global environmental current affairs
EU WEEE Directive and Current Affairs
EU RoHS Directives and Regulations
REACH related regulations and current affairs
European Union Standards Organization-EN13427~EN13432
European Chemical Agency (ECHA)
German two-way system DSD-green dot mark
EU Energy Use Products Directive
Environmental and ecological related reports
Articles
Pallet specifications by country

Environmental News>

Study: Melting sea ice promotes inbreeding of polar bears. Genetic diversity in Norwegian islands has decreased in 20 years 10%

2021-11-18

According to a study published in the Proceedings of the Royal Society on the 8th, between 1995 and 2015, polar bears in the Svalbard archipelago in Norway experienced a 10% decrease in genetic diversity due to inbreeding. Scientists at the Norwegian Polar Institute examined 20 years of ecological and engineering data to investigate genetic trends in the archipelago's polar bear population. The study linked this loss of genetic diversity to the rapid loss of sea ice in the Arctic's Barents Sea. The study attributed the reduced gene flow to habitat fragmentation caused by shrinking sea ice cover, and "increased inbreeding among polar bears in key sampling areas." According to the World Wildlife Fund (WWF), the Barents Sea is experiencing the fastest ice loss in the Arctic, driven by the climate crisis. "When a population shrinks sufficiently, you see a higher chance of close relatives mating and producing offspring. This carries the risk that recessive traits will begin to emerge within the population," said study author Simo Maduna of the Norwegian Institute of Bioeconomy Research. Top predators rely on ice to travel, hunt, rest, and reproduce. They mostly wander the sea ice and rarely come ashore. The climate crisis is changing polar bears' diets, potentially increasing human-bear conflicts. Another study in April also found that the climate crisis is changing polar bears' eating habits. Polar bears spend more than half their time foraging, but with fewer opportunities to hunt seals, hungry bears are forced to eat seabirds and their eggs. With declining food sources, polar bears are increasingly observed killing each other. They are also increasingly traveling away from their nursing dens, where they gestate during pregnancy. Last month, Russian Environment Minister Svetlana Radionova wrote on social media, "The frequent appearances of polar bears in front of people are a worrying phenomenon. In one case, helicopters were even deployed to keep the bears out of reindeer habitat on the Yamal Peninsula in northwestern Siberia." The study stated that increased isolation between animals "may lead to increased inbreeding in the future, with potential negative consequences such as inbreeding depression." However, other studies have found that such inbreeding is rare. There are approximately 25,000 polar bears on Earth, scattered across the Arctic regions of Alaska, Canada, Greenland, Norway, and Russia. Polar bears are already listed as endangered. According to a study published in the journal Nature Climate Change, they are likely to become extinct by the end of the century. Source: Environmental Information Center

上一頁PreviousVietnam, the fourth largest country in marine plastic waste, plans to reduce plastics in supermarkets by 2025 and switch to environmentally friendly packaging materials.

NextA waste removal machine that eats garbage is gaining traction in Sichuan, while environmental advocates urge plastic reduction at the source.下一篇

Line

Lion Technology Industrial Co., Ltd.

Phone: +886-2-26793552
FAX: +886-2-26794698
Email: Service@Li-On.Biz

Head Office/Factory Address: No. 161, Jianshan Road, Yingge District, New Taipei City 23942
No. 161, Jianshan Rd., Yingge Dist., New Taipei City
23942, Taiwan (ROC)

Welcome! You are the visitors

© 2026 LION Green Design Co., Ltd. All Rights Reserved