Polar bear

Whereas this question still made debate it does not have there so a long time, the hour is not any more with knowing or not planet so yes is heated because of human activity. The constant increase in the temperatures is a fact and its consequences are shown each day a little more. As often, all the areas of the sphere are not placed with the same sign vis-a-vis this upheaval. The Arctic is thus particularly sensitive to this rise of the temperatures and the cast iron of the icecap is heavy consequences for the various animal species populating the Far North.

True symbol of the world of the ices, the polar bear is thus threatened and could become the first mammal with being declared officially in danger because of the Global Warming. According to the WWF, the zone covered by the ice-barrier with summer in the Arctic, is reduced already of 9,2% per decade and could disappear entirely by the end of this century. For largest predatory of the places, this report is alarming and numbers researchers already drew the alarm. Whereas the population of the polar polar bears is estimated at approximately 27000 individuals, including 15000 alive on the Canadian territory, their number falls in a worrying way. Thus, in the vast Canadian area of Churchill, one estimated that approximately 1200 ago to 1600 wild plantigrades in the middle of the years 1990 and that they would not be today than approximately 950.

Another worrying report, of the researchers noted that the average weight of the adult females decreased of almost a quarter during 25 last years. The bears have indeed more and more evil to drive out the seals because of disappearance of the ice-barrier and certain cases of cannibalism were even observed lately. Ever seen into 25 of research on these large mammals! Moreover, of many specimens die drowned each year. However famous to be excellent swimmers, the polar polar bears would be unable to traverse the distances between islands formerly much closer from/to each other, thanks to extended from ice, and would swim until exhaustion of their forces.

Having more and more evil to nourish itself, these large predatory takes moreover the bad habits to approach more and more the cities located on their territory. They find a number of waste able there to fill their appetite, but their presence represents a true danger to the local populations. The authorities try to drive out them periphery of the cities and even created a prison for bear in order to keep them in captivity during the winter, before slackening them far from there in spring.

Only positive point for the large polar polar bear, the sympathy which it causes near human, in particular in Canada and the United States.

Thus the American government, under the pressure of many ecological associations comes, with against heart, to propose the inscription of the polar polar bears on the list of the threatened species. This large carnivore would become thus, officially, the first mammal threatened of extinction because of the Global Warming. The following stage would be that the United States decides to reduce their gas emissions for purposes of greenhouse, but this last point is far from being acquired since the American government still did not recognize the bond between these gases and the reheating of planet.

At all events, the threats which weigh on the bears could influence certain capital decisions. Sympathy and the fascination which they cause can lead certain governments to modify their positions. It is in any case what one can wish, because the kings of the ice-barrier are not only animal the victims of the reheating in these polar areas. Caribous and other snow gooses, in particular, are also likely to see their habitat durably modified during next years, without one being able to determine which impact these changes will have on their populations. A thing is sure, according to the scientific review Nature, it is which a many species of plants, insects and animals southernmost already started to migrate towards North, at the rate of 6 kilometers per decade. It is thus a total upheaval of the ecosystem of the Far North which prepares. A striking example from what could occur well on the unit from the sphere if one does not take radical measures quickly to limit the reheating of planet.