Sunday, 2026/02/08207 words3 minutes114 reads
In a surprising development that challenges conventional wisdom, polar bears in the Norwegian Arctic archipelago of Svalbard have exhibited increased body mass and improved health since the early 1990s, despite the persistent decline in sea ice attributed to climate change. This phenomenon has perplexed scientists who had anticipated a detrimental impact on the bears’ well-being.
Traditionally, polar bears rely on sea ice as a crucial platform for hunting seals, their primary prey rich in blubber. However, a comprehensive study involving 770 adult bears, conducted between 1992 and 2019, revealed a significant increase in the animals’ fat reserves. Researchers posit that this adaptation is likely due to the bears diversifying their diet to include more land-based prey, such as reindeer and walruses.
The resurgence of walrus populations, following their protection in Norway since the 1950s, has provided an additional source of calorie-dense nutrition for the bears. Moreover, the concentration of seals in diminishing ice areas may have inadvertently made them more accessible targets. While these findings present a positive short-term outlook, scientists caution against long-term optimism. As sea ice continues to recede, bears may be forced to expend more energy traveling to hunting grounds, potentially negating their current nutritional gains and jeopardizing their survival in the Arctic ecosystem.
Audio
Words
perplexed
adj.困惑的,迷惑的
v.使困惑,使迷惑
detrimental
adj.有害的,不利的
n.损害,伤害
posit
v.假设或放置某物。
n.某种观点或主张。
resurgence
n.复兴,重新出现
v.重新出现,复兴
inadvertently
adv.无意中,非故意地。
Quiz
1、What unexpected trend have researchers observed in Svalbard’s polar bear population?
A decrease in population size
An increase in body mass and improved health
A shift to a completely vegetarian diet
2、Which factor is NOT mentioned as contributing to the bears’ improved condition?
Increased availability of walruses
Concentration of seals in smaller ice areas
Genetic adaptation to warmer temperatures
3、Why are scientists cautious about the long-term prospects for these polar bears?
The walrus population is expected to decline sharply
Bears may need to travel further for food as ice recedes
Reindeer are becoming resistant to predation
Sunday, 2026/02/08178 words3 minutes112 reads
In an unexpected turn of events, polar bears in the Norwegian Arctic archipelago of Svalbard have become fatter and healthier since the early 1990s, despite the steady decline of sea ice due to climate change. This finding has surprised scientists who anticipated the opposite outcome.
Traditionally, polar bears rely on sea ice as a platform for hunting seals, their primary source of nutrition. However, researchers who studied 770 adult bears between 1992 and 2019 discovered that these animals have significantly increased their fat reserves. They believe this adaptation is due to the bears consuming more land-based prey, including reindeer and walruses.
The increase in walrus populations, following their protection in Norway since the 1950s, has provided a new source of fatty food for the bears. Additionally, the concentration of seals in smaller ice areas may have made them easier targets for the bears. While this is positive news in the short term, scientists caution that this trend may not continue as further ice loss could force bears to travel longer distances for food, potentially depleting their energy reserves.
Audio
Words
surprising
adj.令人惊讶的
v.使惊讶或意外
hunt
v.追捕或寻找某物.
n.猎捕的行为或过程.
researcher
n.从事研究的人。
Quiz
1、What are polar bears in Norway eating now?
Only seals
Reindeer and walruses
Fish and birds
Sunday, 2026/02/08113 words2 minutes100 reads
Scientists have found something surprising about polar bears in Norway. These bears are getting fatter and healthier. This is happening even though the ice they live on is melting.
Polar bears usually hunt seals from the ice. But now, they are eating other animals too. They eat reindeer and walruses that live on land. This new food is helping them stay fat and healthy.
Researchers studied 770 polar bears over many years. They found that the bears have more fat now than before. This is good news for the bears right now. But scientists worry that this might not last forever. As more ice melts, the bears might have problems in the future.
Audio
Words
archipelago
n.由多个岛屿组成的群岛。
anticipate
v.预期,期待。
nutrition
n.营养,滋养成分。
deplete
v.耗尽,减少
Quiz
1、What unexpected change have researchers observed in Svalbard’s polar bears?
They have become smaller
They have become fatter and healthier
They have stopped hunting seals
2、Why might the positive trend for polar bears not continue in the long term?
Walruses are becoming extinct
The bears might have to travel further for food
Reindeer populations are decreasing
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