polar
bear
The
polar bear, also known as white bear is by its size, the owner of the lands of
the Arctic. Its closest relative is the brown bear. The differences between the
two species are determined by each adaptations to their environment. In their
adaptation to cold areas, the fur of the polar bear has become clearer, being
thicker and waterproof. The soles of his feet are covered with hair to move on
icy surfaces.
The
polar bear is an agile animal, on land and in water. You can swim at a speed of
10 km / hour and can even sleep in the water. It is also capable of climbing
icy inaccessible areas.
Usually
a solitary animal. When the cold arrives hibernates in a den digging himself in
the snow. Their main food is seals, especially in winter. In the summer it becomes
almost vegetarian. Due to climate change, this species of bears can be seen
very affected.
The
zone temperature increases twice faster than in the rest of the planet and the
Arctic sea ice melts at an average of 9% every ten years. At the moment there
are about 25,000 worldwide, of which 3,000 to 5,000 are in the European Arctic.
By
changing its habitat, this bear can adapt to new climatic conditions, but it is
a change we can not be sure, and some studies indicate the possibility of
extinction by the year 2100
Because
polar bears are in danger of extinction?
Polar
bears live in a very specific habitat. They need the cold, snow and ice from
the polar regions, hence its name. They have very few natural threats in this
polar region. Polar bears are at the top of the food chain and there are no
other animals in the north that endanger, this approach makes us question why
they are on the list of endangered species endangered.
Polar
bears are not endangered because of other animals, or because they are being
hunted excessively, but by a direct effect on the way humans treat the Earth
and the environment. People think that our planet is indestructible, but the
fact is that yes it is and we are destroying.
Polar
bears live in the Arctic, and like many other places on Earth, the Arctic
region has had scientists investigating about what is happening in that region.
Scientists have been testing depth in the core so that drill a hole down into
the ice and take a core. In this ice core can get very specific information
about the weather, the atmosphere and temperature for a specific time period.
Tests
have revealed deep core CO2 data (carbon dioxide) in the atmosphere. There is a
natural range up and down at levels that have never been to over 300 parts per
million, that is, until recent years. This means that carbon dioxide must leave
the Earth's atmosphere then left within it. Carbon dioxide that stays on Earth,
also known as greenhouse gases, raises the temperature of the planet causing
the "greenhouse effect."
