Polar bears off the seacoast of Alaska are effectively walking on a"sea ice treadmill"that is speeding up . This is jam more strain onto the animals that are already being impact by clime modification , making them expend more Energy Department , and thus have to determine more food to fill again it .
fresh inquiry focused on the movement of sea ice rink across the Beaufort and Chukchi seas , as it stray westward . The opposite bears of the region , however , move in the diametrical direction , and radio set shred on female bears in the sphere relayed information about their social movement . Combined with sea ice heading data , the squad was able to forecast exactly how the bear are being affected by the changing environment .
“ increase ocean ice purport rate likely aggravate the physiologic stress due to reduced foraging opportunity already experience by many arctic bears in the warm up Arctic , adding yet another ' chaff to the camel ’s back ’ , ” explained George Durner , lead writer of the report published inGlobal Change Biology , in astatement .
The research worker found that the gain in the f number of the campaign of ice imply that the bears were burn more calories . This match to ask to capture 6 percentage more seals per twelvemonth , or approximately three whole seals . It may not sound like much , but with pivotal bears already skin to get even the minimum number of seals demand , the extra stress and take for more solid food will only make the bears meet further .
Despite many claims that arctic bear are not suffering the impact of clime change , this position is simplynot backed up by the science . Polar bears are divided up into many separate subpopulation , with dissimilar groups facing take issue threats ( such as hunting , touristry , or oil and gas exploration ) . But the one terror that is affecting them all is climate variety .
This declivity in sea deoxyephedrine has been directly linked to a fall in numbers of bears in some regions . But out of the 19 subpopulations of bear , there is only enough data point for 10 of them to be by rights assessed . Out of these , three are in declivity , six are ostensibly unchanging , and one is on the rise . But most of these are based on bailiwick only look at the last few decades , therefore not taking into account past number , and it is thought that one population in the rise is already start from a much - reduce routine in the first place .
Whichever way of life you depend at it , things are not looking good for icy bears , and are improbable to improve . They are facing many terror on multiple level , withone read findingthat there is a 70 percent luck in the global population of bears falling by over a third within three generations .
