Nature & Animals 2 (1080p HD)

Amazing animal video made perfectly. especially the polar bear part.

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Are We going to Face Another Animal Mass Extinction?

Over the past few centuries, there has been a drastic shift in nature. This change is very real and it’s affecting not only humans, but animals as well. Our current biodiversity which is the result of more than 3.5 billion years of changes and adaptation in evolution may be in danger.

Biologist at Stanford warns that we could be facing a mass extinction event, which has already happened 6 times throughout the earth’s history. By reviewing the recent scientific analysis and literature of data published by Science, scientist all over the world are saying that the decline and loss of a number of animal species is underwriting to what seems to be the making of the earth’s sixth mass extinction event.

Since the 1500, there have been more than 320 types of land animals which have been marked as extinct. The populations of all the other remaining species are showing a 25 percent decline. If this trend continues, it could cause a lot of problems for all animal life.

Rodolfo DirzoStanfordbiologyprofessor says that although the previous mass extinctions where caused by natural changes of the earth’s crust or catastrophic events like asteroidstrikes, what we are currently facing today can strongly be linked to human activities.

Across the list of all vertebrates, 16 – 33 percent are labeled endangered or threatened. Large animals, called megafauna, such as polar bears, rhinoceroses,and elephants and a number of other animals found worldwide are the most prone to population problems because of fewer offspring, habitat changes, and poaching.

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Polar Bear Migration Season Fully Underway

Winter season is migration season. In the past month alone, a small town in Canada had seen hundreds of polar bears make the annual trudge back to Hudson Bay, where the ice is freezing once more after the summer melt. Each autumn, the bears pass by the town of Churchill, in Manitoba, Canada, considered as the “polar bear capital of the world.”

Because of their regular annual migration, this group of polar bears is also known as the most studied group of polar bears in the world, with the renowned Dr. Ian Stirling first beginning his groundbreaking research on these animals some 40 years ago.  The regularity in which this particular population comes ashore each year also makes them easy to count, as Steven Amstrup of  Polar Bears International points out.

With a population of just 900 people, Churchill is no doubt a small town, but it boasts of having several hotels, with tourists coming in droves during the winter to see the polar bear migration. The tourist draw is further enhanced by regular sightings of adorable beluga whales at the Churchill River’s mouth. Its’ estimated that around 10,000 tourists make the trip to this town each year.

With the seasonal freeze approaching, polar bears have consistently gathered along Cape Churchill’s coastal areas, giving people the opportunity to see these majestic animals in the   form the safety of tundra buggies, huge all-terrain vehicles that shuttle out tourists during the winter.

To prevent bear attacks, though uncommon but are known to happen, Churchill residents make a racket and fire shotguns with rubber bullets to ward off the animals. The town also closed its dump, which used to draw the bears.

Read the full story on National Geographic.

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Climate Change Affects Hudson Bay Polar Bear Population

The seasonal ice freeze in Hudson Bay is underway, which makes it time for the regular migration polar bears make to the coastal areas of Churchil, Manitoba.

Ursus maritimus, the largest bear in the world and the apex predator in the Arctic, relies heavily on sea ice for survival. These patches of frozen seawater serve as a crucial platform for the bears to hunt for ringed and bearded seals.

During the summer, when the ice melts for several months, polar bears go inland, conserving their energy in what’s known as a ‘walking hibernation; state. This was the cycle for hundreds of years, but serious changes are affecting polar bears, particularly the populations that regular come to Hudson Bay.

Research for the past 40 years shows sea ice cover in the Arctic declined by as much as 30 percent since 1979. According to Steven Armstupf of Polar Bears International, as greenhouse gases continue to reach ocean temperatures, polar bears are finding themselves staying longer on land.

For instance, the Hudson Bay polar bear population now spends an average of close to 30 days longer than they did three decades ago. That means the bears end up losing more weight, about 2 pounds, according to research, for each day they spend on land, and are therefore lighter by 60 pounds than they were 30 years ago.

This drop in weight also means polar bears are giving birth to smaller cubs, which can lead to problems surviving in the wild.  It’s theorized that polar bears ‘will be the first to go’ in a warming world, since depend on a habitat that melts once temperatures rise. If nothing changes, these animals could go extinct in the wild by 2050.

Read the full story on National Geographic.

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Polar Bear: Endangered or Threatened?

There are only a few creatures that can thrive in one of the coldest, iciest and some consider the most unfriendly part of the Earth. Polar bears love to roam around Arctic ice sheets, swim deep into the freezing coastal waters and candidly float on sheers of ice. Thanks to their thick coat of insulated fur which shelters a warming dense layer of fat. Thick fur, even grow beneath their paws to safeguard them from the frostiest surfaces and give them a strong grip on the ice where they tread on. They have characteristics that make them innate swimmers, their toes having tiny webs between them to aid them to swim fast and get agile n water.

Amazingly, Polar Bears survive and dominate in this relatively unfeeling and subzero environment making them masters of the Arctic worlds relying on sea lions, dead whales and other mammal carcasses. They are powerful, attractive and very fascinating, imposing the beauty of nature with all its bounty.

However, their number is fast decreasing. That is why there is a conflict between considering them as merely threatened or endangered. The description of “threatened” can be traced back during the time of President George W. Bush administration but further discussions recently have given rise to a need for review whether or not Polar bears are indeed “threatened” or going down to be moved and classified as downright, “endangered” under the Endangered Species Act that will highly affect climate policies and help regulate greenhouse concerns. In the same manner, the Obama administration has adapted the Bush-era rule.

Behind the pros and cons of branding these furry Arctic giants of either being “threatened” or “endangered”, one fact remains. They are not growing much in number and there is not much to feed on although there are snow geese eggs that have been their fancy. Year after year, there is movement in the environment and the climate change will also increase variably affecting these adorable-looking and gigantic marine mammals. We can just wait and see what is going to happen next.

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Polar Bear Wallpapers

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