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Transcript of ANTARTICA
spring tail which is land based. Food Chain Even the biggest animals in Antarctica rely on the tiny phytoplankton for food. If even one of the animals is removed from the food chain the rest of the chain will fall apart.
e.g. phytoplankton, krill, crabater seals, leopard seals, killer whales.
If we removed the krill, alot of animals would have not enough to eat, so they would die. Then all the animals on top of them would have nothing to eat and they might die as well. Land The area of Antartica is about 14 million square kilometres and Auatralia owns 42% of it. Many other countries own part of Antarctica too, including France, New Zealand and Britain.
Antartica nearly doubles it's size in winter because the water freezes and becomes sea ice. A layer of ice covers about 98% of Antarctica and can get up to 4km deep. There are only a few places where there is bare rock. The two largest areas of bare rock are the Antarctic Peninsula and the Transantarctic Mountains.
There are also hundreds of glaciers in Antarctica, including the worlds largest glacier, the
Lambert Glacier. Huge peices of ice and snow are constantly falling off these glaciers
making huge icebergs that can be kilometres long.
Many islands surround Antactica, some are completely covered in ice
and snow like Anarctica and others are ice and snow free. Bases Many countries have bases set up in Antartica so that they can study the land and the animals that
live there. Australia has four bases in Antartica. Mawson, Casey, Davis and Macquaire Island.
The bases are run like small towns.
A wide range of people are recruited each year.
Some of the things studied at the bases include animals, human impact and
medical research. Treaty The Antartic treaty is a set of rules put together to tell
us what we can and can't do in Antartic territory. Australia was
one of the 12 parties that originally put the treaty together in 1961.
Some of the things the treaty states are:
Antartica should be used only for peaceful purposes
You are allowed to do as much scientific research as you wish
Expeditions and results of research should be made available
You are only allowed to modify the treaty through a specific process
The treaty is one of the most successful international agreements with all the parties still following the effective system. They are all able to
conduct scientific research without damaging Antarctica. There
are now 47 parties who have signed the treaty and
membership continues to grow.
Future The future of Antartica depends largely on humans. If people continue to hunt the whales or other animals in Antarctica, it could destroy the animal life there. Most people are doing what they can to protect Antarctica and its wildlife, with the Antarctic Treaty and many organisations trying to help. If we continue to destroy the ozone layer and hunt Antartica's wildlife Antarctica has no hope. Bibliography Lonely Planet [internet]
[accesed:20/5/2010] Penguins There are about eight types of penguins in Antarctica, one of them being the Emperor Penguin. THANK YOU
LISTENING! Sea Birds The Mawson Base Whales Australian Antarctic Division
[internet] avalible from:
Sophia One of the many sea birds found in Antarctica is the
Black Browed Albatross. 210-250cm wing span
80-95cm in length
Eat krill and fish
One of the many types of whales in Antarctica is the Humpback whale. 50m long
Eat Krill, small fish, plankton
Whalers are a threat
Live 40 years
Eat fish, krill, squid
Breed during Antarctic winter
The fate of Antarctica
and all the animals living there
is in our hands! Australian claim