Polar Bear

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Ecosystems

Wesley Castle‑k egina

Mind Map of Atmospheric Habitat

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CHAPTER 3 ADAPTATION AEROBIC & ANAEROBIC EXERCISE

Arif Fakhry bin Zamron‑k egina

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Polar Bear

Strategies Of Adaption

Fur even grows on the bottom of their paws, which protects against cold surfaces and provides a good grip on ice. The bear's stark white coat provides camouflage in surrounding snow and ice. But under their fur, polar bears have black skin and then its like better to soak in the sun's warming rays.

They have big canines at the front and very sharp back molars that help them sheer blubber and fat off of their prey.

Their claws are thick and sharp and help them pull out slippery seals from underneath the water. Polar bears also have very big heads with really sharp teeth that help them hunt their prey.

Biome

Such as their webbed paws, allowing them to swim and traverse the icy waters more easily, as well as their sharp claws which help them catch fish and other prey

The tundra biome is perfect for polar bears because of the cold temperature and how it fits good with the polar bears.

Tundra is the coldest biome of all. Tundra is known for its frost-molded landscape and its extremely low temperatures, little precipitation, deficient nutrients, and short growing seasons.

Inuit People

With the exception of NunatuKavut, these areas are known as Inuit Nunangat, primarily by the Inuit Tapiriit Kanatami. In Canada, sections 25 and 35 of the 1982 Constitution Act define the Inuit as a distinct group of Aboriginal Canadians who are not classified as First Nations or Métis. As a result, Inuit Sign Language is extremely localized and has very few native speakers.

The Inuit are a group of culturally similar indigenous peoples who live in the Arctic and subarctic regions of Greenland, Labrador, Quebec, Nunavut, the Northwest Territories, and Alaska. Inuit languages are part of the Eskimo-Aleut languages, also known as Inuit-Yupik-Unangan and Eskaleut. Inuit Sign Language is a critically endangered language that is only found in Nunavut

Polar Cubs

Newborn cubs are blind, toothless, and covered in soft white fur, and are completely dependent on their mothers. They are only 30-35 cm long and weigh slightly more than 1/2 kg (1 lb) (12 to 14 in). The cubs grow quickly on their mother's high-fat milk (31% fat) and nurse for at least 20 months.

At birth, polar bear cubs weigh about 454 to 680 g (16-24 oz.) and are about 30 cm (12 in.) long. Males are born slightly larger than females.

Polar bears are larger than many brown bear subspecies. In the middle of winter in some of the coldest places on Earth, female polar bears give birth to cubs. Litter size is most commonly two cubs, but sometimes litters can be one, three, or, very rarely, four cubs.

Polar bear cubs are born small and helpless, with their eyes closed.

The fur is very fine at birth, making the cubs look hairless.

Fur

While the hairs of the polar bear may appear white from a distance, under closer inspection, its fur is actually made up of hollow, clear tubes that act as prismatic reflectors, scattering light and resulting in the bear's coat appearing white This unique adaptation of the polar bear helps it blend into its environment and therefore avoid detection from potential predators

Their white fur gets camouflaged against the white background of snow protecting it from predators and also helps them catch their prey. Two thick layers of fur act a an insulator protecting them from the surrounding harsh climate.

Polar bears have white fur to blend in with their surroundings. In Arctic environments, their coat is so well camouflaged that it can sometimes pass for a snow drift. Surprisingly, the polar bear's coat lacks white pigmentation; in fact, the polar bear's skin is black and its hairs are hollow.

A quality polar bear hide used to sell for between $12,000 and $20,000, but now a large and high grade hide goes for $5,000 at the most, says Edwin Ferguson, a fur technician.

When that market fell, buyers stopped looking for small bears. "There's a market for bigger bears.

Life-style

The sea ice is the polar bear's most favorite habitat of all time. The most important habitats for polar bears are the edges of pack ice, where currents and wind interact, forming a continually melting and refreezing matrix of ice patches and leads (open spaces in the sea ice).

These bears are completely reliant on sea ice as their primary habitat, using it for a variety of essential activities such as hunting and feeding on seals, seeking mates and breeding, making long-distance movements, accessing terrestrial maternity dens, and occasionally even the maternity den itself.

Map

However, sea ice is shrinking due to climate change, resulting in a decrease in the polar bear's habitat and forcing them to find alternate sources of food or move to areas farther north. Polar bears can be found throughout the northern polar region. In the winter, polar bears in Alaska are found as far south as St. Lawrence Island and occasionally move down to St. Matthew Island and the Kuskokwim Delta.

Norway, Alaska, Canada, Finland, Sweden, Russia and etc.

In the summer, bears are most abundant around the edge of the pack ice in the Chukchi Sea and Arctic Ocean. Polar bears inhabit different areas throughout the year, depending on the availability of food sources.

Arctic

The polar bears live in the Arctic biome of the Arctic Circle at the North Pole. They are highly adapted to their environment, with thick fur and a layer of fat that helps keep them warm in the freezing temperatures. By the look of the polar bears there, they seem to like the arctic tundra very much Much of the polar bear's life is dedicated to staying warm in the cold temperatures, but the polar bears have other adaptations that help them to survive in this environment.

Ecosystem

Polar bears are extremely and very effectively good swimmers, but their most common favored habitat is to climb up on the top of the ice that covers the Arctic sea and ocean over the year. Polar bears prefer sea ice habitats with leads and polynyas near continental coasts or islands.

Polar bears prefer sea ice habitats with leads and polynyas near continental coasts or islands. Leads are water channels or ice cracks that can remain open (ice-free) for a few minutes to several months, depending on weather and water currents.

Climate

The Arctic is warming about twice as fast as the global average, causing the ice that polar bears depend on to melt away. Loss of sea ice also threatens the bear's main prey, seals, which need the ice to raise their young. To add to this, reduced sea ice also has a negative impact on the availability of food for polar bears, leading to an increase in mortality from starvation and cannibalism

The importance of polar bears Polar bears are at the top of the food chain and have an important role in the overall health of the marine environment. Over thousands of years, polar bears have also been an important part of the cultures and economies of Arctic peoples. As climate change accelerates, polar bears are facing unprecedented threats to their survival leading to a decrease in their population size

hunting

Hunting is still the year-round hunting technique used most frequently. The polar bear waits for a seal to surface by standing still next to a breathing hole or lead edge. The polar bear bites the head or upper body of a surface-surfacing seal before flipping it onto the ice. This reliance on sea ice puts the polar bear in a precarious situation, as its habitat is drastically changing due to global warming With sea ice melting at an alarming rate, polar bear populations are projected to decline by over 30% in the next thirty to forty years

Still hunting. Still hunting is the most common hunting for polar bears as they walk slowly towards their