Polar Bears Are the Symbol of the Tragedy of Global Warming

Polar bear deaths due to global warming are of increasing concern, and new studies speculate that Polar Bears face extinction. Most dangerous is the fact that as global warming increases, Polar Bears will have an increasingly difficult time finding food. In fact, thousands of polar bears are feeling the effect of a shortage of food and are facing starvation as you read this.

There are an estimated 20,000 Polar Bears in the wild and they depend upon the arctic weather for their livelihood. Today, there are dozens of accounts of Polar Bear drownings attributed to loss of pack ice, due to global warming.  The Polar Bear is doomed if something isn’t done to reverse the dangers of global warming. Polar Bears depend upon the natural habitat of the Arctic, however global warming has contributed to the growing loss of Arctic Ice. In fact, polar bears have been photographed clinging to tiny ice formations as their natural environment simply melts away, leaving them at the mercy of a climate that they cannot survive in.

However, there is hope.  Although the Polar Bear is threatened, there is still much that we can do to help prevent tragedies from taking place and much we can do to slow global warming. Polar bear habitats must be preserved, protected, and established. 

How to prevent the affects of global warming on polar bears?

The Polar Bear is adapted to living in harsh freezing environments. Because the Polar Bear has not just one, but two layers of fur and can survive temperatures as cold as 50 below zero Fahrenheit. In fact, the Polar Bear is so well suited for Arctic weather, that warmer climates will cause the Polar Bear to overheat. Everything from the size of the Polar Bear’s ears to his or her tail is designed to prevent heat from escaping; the Polar Bear simply cannot survive if the Arctic climate continues to heat up due to global warming.

One of the best ways to prevent the affects of global warming on polar bears is to stop (CO2) Carbon Dioxide emissions.  Everyone can do their part to cut down on these terrible wastes and help save the planet. You can find ways to cut back on (CO2) Carbon Dioxide emissions from recycling and reusing products to using energy efficient appliances. The only way to see a halt in global warming is for everyone to make a change, no matter how small those changes may seem. It is everyone’s responsibility to do his or her part and give Polar Bears a chance to survive. 

Q&A's:

Where do polar bears live?

In the circumpolar north in areas where they can hunt seals at openings in the sea ice called leads. There are five nations with polar bears: U.S. (Alaska), Canada, Russia, Greenland, and Norway. Polar bears do not live in Antarctica. Penguins do.

Are polar bears endangered?

Experts in polar bear science say yes. They predict that as the Arctic continues to warm due to climate change, two-thirds of the world's polar bears could disappear by mid-century—although hope remains if action is taken to greatly reduce greenhouse gas emissions. Rapid loss of sea ice is their major threat. Others include pollution, poaching, and industrial impact. Hunting will become a threat if not well regulated. In May 2008, U.S. Department of the Interior listed the polar bear as a Threatened Species under the Endangered Species Act.

How big are polar bears?

Very big! Adult males normally weigh 351 to more than 544 kilograms (775 to 1,200 pounds). Adult females are smaller, normally weighing 150 to 295 kilograms (330 to 650 pounds). The largest polar bear ever recorded was a male weighing 2,209 pounds. Wow! Scientists usually refer to how tall bears are by measuring them at the shoulder when on all fours. Those heights are typically 3.5 -5 feet for adult polar bears, both male and female. An adult male may reach over 10 feet when standing on its hind legs.

How do polar bears survive in the arctic environment?

They’re built for it! Polar bears love the Arctic climate, where winter temperatures can plunge to -45º C (-50º F). Polar bears are insulated by two layers of fur that help keep them warm. They also have a thick fat layer. In addition, their compact ears and small tail also prevent heat loss. In fact, polar bears have more problems with overheating than they do from the cold—especially when they run.

Polar bear feet are furred and covered with small bumps called papillae to keep them from slipping on ice. Their sense of smell is powerful for detecting seals. And their powerful claws can haul out a 40-90 kg (150-200 lb) seal from the water for dinner.

What do polar bears eat?

Polar bears have evolved to feed on seals, specifically seal fat, the highest calorie food source possible. The bears prey on both ringed and bearded seals. Ringed seals, which are smaller, are the most accessible, especially to younger bears and females. Male polar bears also hunt bearded seals, which are larger. When hunting is good, polar bears eat only the blubber in order to build up the fat reserves they need to sustain themselves between meals. They leave the carcass for scavengers, such as arctic foxes, ravens, and younger bears. All the other foods that polar bears may eat are opportunistic feedings. Most of these foods, with the exception of beached whales, don't provide enough calories to sustain the polar bear's massive body size or to build up the bear's own fat reserves.

What is the polar bear's place in the food chain?

Right at the top of the arctic food chain. Polar bears balance nature by preventing an overpopulation of seals.

What is a polar bear's life span?

In human terms, not very long. In the wild, polar bears live an average 15 to 18 years, although biologists have tagged a few bears in their early 30s. In captivity, they may live until their mid- to late 30s. Debby, a zoo bear in Canada, lived to be 42.

How many cubs do female bears have? Twins are most common, but they can bear singlets or triplets depending on their condition. They give birth to their first litter when they are between four and eight years old—most frequently at five or six. Polar bears have the one of the slowest reproductive rates of any mammal, typically producing only five litters in their lifetime.

When and where are the cubs born?

In November or December in snow caves called maternity dens. After feeding heavily in April or May, females that have mated dig a den in late October or early November. Most choose den sites in snowdrifts along mountain slopes or hills near the shore. Some dig their dens in snowdrifts on the sea ice.

What do newborn cubs look like?

Like a big, white rat. At birth, cubs are 30 to 35 centimeters (12 to 14 inches) long and weigh little more than half a kilogram (about one pound). They are blind, toothless, and covered with short, soft fur. They are completely dependent on their mother for warmth and food.

When does the family emerge from the den?

In March or April. During her time in the den, the mother does not eat, drink, or defecate. Cubs grow rapidly, thanks to the calories in their mother's rich milk, which is about 31% fat. In their first year of life, cubs are called coys, which stands for cubs of the year.

How long do the cubs remain with their mother?

Until they’re about 2-1/2 years old—although some bears in the Hudson Bay area wean their young at age 1-1/2. During this time with mom, they learn how to hunt and survive in one of the earth's harshest environments. Between the time they leave their mother and they are mature enough to mate, they are called subadults.

Do polar bears hibernate?

Not in the strict sense of the word. True hibernators experience a marked drop in heart rate and body temperature and generally stay for a long period in a den. Polar bears instead enter a state of walking hibernation where their metabolism slows. Only pregnant polar bears enter a den, give birth, and emerge three months later.

Are there different populations of polar bears?

Yes. Scientists recognize 19 distinct populations of polar bears, but no subspecies.

Does the polar bear have any enemies?

Only humans, and on rare occasions, other polar bears.  Scientists believe that food stress is increasing acts of cannibalism, which has historically been a natural, but infrequent event. Only starvation would drive the polar bears to eat each other and that is what they are being reduced to. Can you see the tragedy now??

They have a right to be here, a right to live. And we can assure them that right with a concerted effort to slow global warming. Join us.

To  learn more, contact:  http://www.polarbearsinternational.org/

OR:  http://www.naturecanada.ca/

For Jenny, my favorite crusader