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Science ACEScience ACEBenedict Chin 2A2 (06)Benedict Chin 2A2 (06)

ExtinctionExtinction

What exactly is extinction?What exactly is extinction?Extinction isExtinction is- The The end end an organism, ( also a group of organisms ) or species .an organism, ( also a group of organisms ) or species .

The point of extinction isThe point of extinction is- The death of the The death of the last last individual of the species .individual of the species .- The last existing member of the species dies . The last existing member of the species dies .

Functionally extinct isFunctionally extinct is- When only a small amount of individuals survive.When only a small amount of individuals survive.- These individuals are unable to reproduce, due to old age, unhealthy body These individuals are unable to reproduce, due to old age, unhealthy body

ex. ex.

Examples of extinct animalsExamples of extinct animals

- Tasmanian Wolf Tasmanian Wolf - Quagga Quagga - Turanian Tiger, Caspian Tiger Turanian Tiger, Caspian Tiger - Dodo Dodo - Irish Deer Irish Deer - Saber Tooth Tiger Saber Tooth Tiger

Tasmanian Wolf Tasmanian Wolf

Marsupial ( relative of kangaroos)

Extinct in England 1486

Extinct in Scotland 1743

Extinct in Ireland 1770

Quagga Quagga Sub-species of zebra

Part of the triple alliance , consisting of the “ Quagga, Wildebeast, and the Ostriches .” to put up a solid defence against predators.

Extinct in Amsterdam Zoo 1883

Turanian and Caspian TigerTuranian and Caspian Tiger

Lived in China Tajikistan

Turkey Iran

AfghanistanExtinct in 1957

Dodo Dodo Discovered by Portuguese in 1505

Discovered in island of Mauritius

Flightless

Extinct in 1681

Irish deerIrish deer

Lived in Europe and Ireland

Broad antlers

Size of a moose

Extinct 10000 to 11000 years ago!

Sabertooth TigerSabertooth Tiger

Lived in Europe and North America

Fast runners

Ambush in packs

Extinct about 10000 years ago !

Animals on the verge of Animals on the verge of extinction! extinction!

- Polar bearsPolar bears- Lions Lions - Tigers Tigers - Egyptian vulturesEgyptian vultures- Mountain gorillas Mountain gorillas

Polar bearsPolar bears

Due to global warming

Range of hunting shrinking

( the ice to hunt prey)

20000 to 25000 polar bears left !

30% of the recognized sub-population are in decline!

LionsLions

Number has dropped by more than half in less than 20 years !

From 400,000 lions in 1950 to 16,500 to 47,000 lions now !

Population carved into tight ranges

Humans spread into their range and space

Tigers Tigers Humans are constantly hunting them for

-fur

-paws

-teeth

-gallbladders

Under assault, by humans for past decades .

About 2,500 tigers left .

Egyptian vulturesEgyptian vultures

white, and beautiful

Lives in Southern Europe, Northern Africa

Poisoned by drugPoisoned by Diclofenac, an inflammatory drug

Mountain gorillasMountain gorillasLosing their habitat

Face poaching

Have the Ebola disease

Hunters, farmers, and diseases.

What can we do about it?What can we do about it?Since human activities are some of the reasons why extinction comes about, we should try to minimise them, or ensure that they are benign. Such activities include

-Deforestation

-Over-fishing

Similarly, we also must discourage the hunters or poachers to hunt the poor animals down. One way would be to stop eating a particular food, so as to show disinterest in the animal, and that would deter poachers from hunting.

For example, shark fin’s soup. If more and more people stop eating shark fin’s soup, there would be no demand for the food. With no demand, there is no need for a supply. Therefore we can try to stop eating some endangered animals and thus discouraging hunters from poaching.

Some videos ! They are Some videos ! They are meaningfulmeaningful

- Detailed video on extinct animals .Detailed video on extinct animals .

http://www.youtube.com/watch?v=NNhttp://www.youtube.com/watch?v=NNmTLLmhxFQmTLLmhxFQ

- Rediscover of extinct animals ! Rediscover of extinct animals !

http://www.youtube.com/watch?v=LaQhttp://www.youtube.com/watch?v=LaQd7Zfqj7gd7Zfqj7g

Thank you so much for your Thank you so much for your attention !attention !

bibliographybibliographyhttp://en.wikipedia.org/wiki/Extinctionhttp://en.wikipedia.org/wiki/Extinction http://www.50birds.com/extan/gextanihttp://www.50birds.com/extan/gextanimals1.htmmals1.htm

http://ecolocalizer.com/2009/04/07/10-http://ecolocalizer.com/2009/04/07/10-animals-on-the-verge-of-extinction/animals-on-the-verge-of-extinction/

http://www.mnn.com/earth-matters/anihttp://www.mnn.com/earth-matters/animals/photos/10-animals-on-the-verge-mals/photos/10-animals-on-the-verge-of-extinction/lionsof-extinction/lions