Antarctica Flashcards
What are the 4 main threats to Antarctica?
-Fishing and whaling
-Climate change
-Mining and the search for mineral resources
-Scientific research and tourism
When did whaling start in the Atlantic?
It started in the North Atlantic between 1904-1965.
Why did whaling move to the Southern Ocean (Antarctic Ocean)?
Because the number of wales in the Atlantic had been significantly reduced.
What does IWC stand for?
International whaling commission
When was the IWC established?
1946
What did the IWC establish in 1994?
The SOUTHERN OCEAN WHALE SANCTUARY, an area of 50 million km2.
How does Japan get around the ban on whaling?
They claim their whaling is for scientific research.
Why are krill so important in the Antarctic ecosystem?
Krill are at the bottom of the food web meaning that most other species rely on them.
Why are krill over fished in the Southern Ocean?
For their high protein content and and omega-3 in east Asia.
What issue do fishing ships cause?
They dump waste and pollute marine habitats.
How much has the air temperature increased by in Antarctica in the last 50 yrs?
3 degrees C
Which antarctic ice sheet has thinned significantly due to increased temperatures?
The west Antarctica ice sheet
What happened to ice shelves due to increased temps?
They collapsed
What has happened to penguin colonies due to climate change?
The distribution of them has experienced changes.
What has increased temps in the water led to?
Some species declining, such as krill, or even dying off due to uninhabitable conditions?
What does melting of ice lead to on land?
An increase in colonisation by plants
What is Ocean acidification caused by?
Increased CO2 in the atmosphere
What can ocean acidification cause?
Unprotected shells and the skeletons of soft marine organisms become corroded.
What originally banned mining in Antarctica?
The antarctic treaty
What will future demand for minerals cause?
It will put pressure on the ban on mining in Antarctica.
Why is Antarctica a target for mining?
There is an abundance of mineral deposits.
What did some countries do in the 80s involving the treaty?
Some members of the treaty attempted to formulate a new convention that allowed the exploration for mineral and gas reserves.
What did some countries do in the 80s involving the treaty?
Some members of the treaty attempted to formulate a new convention that allowed the exploration for mineral and gas reserves.