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US News Melting ice in the Arctic: the plight of polar bears

01:50  25 february  2021
01:50  25 february  2021 Source:   lepoint.fr

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The Arctic ice melting faster is going to affect the global weather patterns since it will impact the frequency and magnitude of the major storms. Let’s not forget about the huge hurricanes and storms we witnessed this year. Such a dramatic change is going to trigger dangerous longer-term Among other consequences, we might see we can count the alteration of the Arctic marine ecosystem. As such, animals like the polar bears will find it increasingly harder to hunt and feed themselves. Furthermore, this can lead to an imbalance in the way in which mammals and not only feed and reproduce.

Polar bears live in a remote and inhospitable environment far from most human settlements. For most biologists, opportunities to observe these animals are fleeting. In fact, scientists' main resources for understanding basic behaviors of polar bears on sea ice are observations of polar bear behavior and To answer this question, I have been studying polar bears ' physiology and foraging behavior in the Arctic since 2013 with colleagues from the U.S. Geological Survey, the University of California at Santa Cruz, the San Diego Zoo Institute for Conservation Research and Dr. Stephen Atkinson, an

  Fonte des glaces dans l’Arctique : le calvaire des ours polaires © Provided by Le Point

C ' is an alarming finding which is directly linked to global warming. Faced with the accelerating ice melt in the Arctic for several decades, The Guardian reports that polar bears are forced to use up to four times as much energy to survive. Scientists point out in a report that these mammals are physiologically designed to use as little energy as possible and that shrinking glacial space is forcing them to spend more in order to stay alive.

The daily life of polar bears is therefore far from being restful since they are obliged to swim on average three days to find seals, their favorite prey, or sources of energy dense terrestrial food, indicates the British newspaper. As a result, their travel time to feed has lengthened considerably, in time but also in distance, which increases their vulnerability.

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Scientists from the AWIPEV polar station are monitoring the rapid changes - and keeping an eye out for dangerous polar bears . When Marion Maturilli trudges through the slush to get to her meteorological measuring instruments, station manager Piotr Kupiszewski goes with her, armed with a rifle to protect in case Two film crews explore the spectacular wilderness of the Arctic . The people who live there face dramatic changes. Part two takes viewers from East Greenland to Alaska. 2019: The year of climate consciousness 27.12.2019. Wildfires across the world, Arctic ice rapidly melting , seas rising, habitat

Despite difficult ice conditions and curious polar bears , a German research icebreaker with 100 scientists and crew members is comfortably adrift in the frozen Central Arctic , two months into a yearlong expedition to study the region’s changing climate. “Mosaic is in full swing,” Jessie Creamean, a researcher from Colorado State University, wrote in an email, using the informal name for the expedition, the Multidisciplinary Drifting Observatory for the Study of Arctic Climate. The ship, the Polarstern, has been frozen into the ice since early October; Dr. Creamean and other researchers will

A coming domino effect for other mammals?

This phenomenon can also be observed in other animals, such as narwhals. melting ice indeed disrupts their natural environment and their ability to feed themselves by going to seek their prey in the depths. “With a limited amount of oxygen in their muscles and blood, we find that narwhals rate their speed, depth and duration of their dives based on the capacity of their internal reserves. A miscalculation could lead to drowning, ”warns Dr Terrie Williams, co-author of a scientific report on the Arctic .

READ ALSO Global warming: the explorer who makes the ice talk

The Guardian also points out that the climate crisis is modifying their migration and opening up the arctic regions to industrial activity which encroaches on the territories of narwhals. Killer whales, another major predator, have entered the Arctic marine ecosystem in recent decades and are known to prey on narwhals. Concluding their report, the scientists believe that the decline of polar bears and narwhals could have a domino effect on other ice-dependent mammals, leading to "rapid changes throughout the marine ecosystem of the 'Arctic'. Some animals like beluga whales, arctic foxes and muskoxen are likely to be vulnerable to similar changes if the ice melt intensifies.

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