Polar Bears Thrive Amid Arctic Melt: Scientists Puzzled

Thairath•International•265d ago

Reader Briefing

Despite significant Arctic ice melt due to global warming, polar bears in Norway's Svalbard region have become healthier and gained weight over the past 30 years, puzzling scientists.

•Polar bears in Svalbard, Norway, have shown an increase in body fat and improved health between the early 1990s and 2019.
•This trend is occurring despite the continuous shrinking of Arctic sea ice, the primary hunting platform for polar bears.
•Researchers suggest bears have adapted by hunting more terrestrial prey like reindeer and walruses, and potentially by more efficient seal hunting in shrinking ice areas.
•While a short-term positive, scientists warn the long-term survival of polar bears remains threatened by ongoing ice loss.

Overview

•Between the early 1990s and 2019, 770 adult polar bears were studied in Norway.
•Polar bears in Norway showed a significant increase in stored body fat over the study period.
•The shrinking sea ice, crucial for hunting seals, has been extensively impacted by global warming.
•Scientists hypothesize that polar bears are adapting by hunting more terrestrial animals like reindeer and walruses.
•Dr. Jon Aars stated that the observed increase in polar bear weight indicates improved health.
•Walruses, legally protected in Norway since the 1950s, have increased in population and become a new food source.
•Researchers caution that while this trend is positive in the short term, it may not be sustainable due to continued ice loss.
•In other Arctic regions, global warming has severely impacted polar bear populations, with some subspecies seeing direct declines.

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Key Quotes

Dr. Jon Aars

"Fatter bears mean better health."

หมีที่อ้วนขึ้นหมายถึงสุขภาพที่ดีขึ้น

Dr. Jon Aars

"If the ice floes for seals shrink, seals may congregate in limited areas, making them easier and more efficient for bears to hunt."

หากพื้นที่แผ่นน้ำแข็งของแมวน้ำมีขนาดเล็กลง แมวน้ำอาจรวมตัวกันในพื้นที่จำกัด ทำให้หมีสามารถล่าได้ง่ายและมีประสิทธิภาพมากขึ้น

Dr. Jon Aars

"He admitted he expected to see bears in worse condition given the severe loss of sea ice."

เขายอมรับว่าเขาเองคาดว่าจะเห็นสภาพร่างกายของหมีแย่ลง เมื่อการสูญเสียแผ่นน้ำแข็งในทะเลรุนแรงถึงระดับนี้

Dr. John Whitman

"This study is a positive sign in the short term, but warns that body condition is only one of many factors."

ผลการศึกษานี้ถือเป็นสัญญาณบวกในระยะสั้น แต่เตือนว่าสภาพร่างกายเป็นเพียงหนึ่งในหลายปัจจัย

Key Entities

Organization

Polar Bear(หมีขั้วโลก)ℹ️

The subject of a recent study on climate change adaptation and health in Norway.

Norwegian Polar Institute(สถาบันโพลาร์นอร์เวย์)ℹ️

The institution where lead researcher Jon Aars works and conducted the polar bear study.

Walrus(วอลรัส)ℹ️

A large marine mammal that has become a significant new food source for polar bears in Svalbard due to population recovery.

Reindeer(กวางเรนเดียร์)ℹ️

A terrestrial animal that polar bears in Svalbard have begun hunting more frequently.

Scientific Reportsℹ️

The scientific journal where the research on polar bears' health and adaptation was published.

Polar Bears Internationalℹ️

A conservation organization that commented on the study, noting the long-term threats to polar bears from ice loss.

Place

Norway(นอร์เวย์)ℹ️

The location where polar bears were studied and found to be gaining weight despite Arctic ice melt.

Svalbard(สฟาลบาร์)ℹ️

A Norwegian archipelago in the Arctic Ocean and a key study area for polar bears in Norway, significantly affected by global warming.

Western Hudson Bay(อ่าวฮัดสันตะวันตก)ℹ️

A region in Canada where polar bears are extensively studied and have demonstrably declined due to rising temperatures.

Person

Jon Aars(ยอน อาร์ส)

Lead researcher from the Norwegian Polar Institute who conducted the study on polar bears in Svalbard.

John Whitman(จอห์น ไวต์แมน)

Senior scientist at Polar Bears International who provided commentary on the study's findings.