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Endangement and extinction
Transcript of Endangement and extinction
Endangerment and extinction
The main causes of extinction
Native orchid summer lady's-tresses and the creeping spearwort became extinct becauseof climate change. The conditions they lived it became very cold which caused them to die out. A lot of plants become extinct like this and there isn't much we can do about it.
What does scnt stand for?
Somatic cell: This is any cell in a body apart from the two reproductive cells, egg and sperm cells.
Nuclear: The nucleus is like the cell's brain. This is where DNA comes from. It's the differences in our DNA that make each of us different.
Transfer: Moving an object from one place to another
Why it's useful
Cloning could be used to preserve species, e.g. tigers, because it makes more of that specie without a male being involved. Also the specie would be less likely to become extinct when we are making more of them.
Cloning is good
Although Cloning is not a natural process, without humans getting involved there would be some species that would die out. This is why I think cloning is good, it help to preserve species that may become extinct.
Tigers are involved in conservation programmes. A conservation program is where you protect an animal or plant from harm or destruction. WWF have over 3000 projects to help the environment at the same time.
The advantage of a conservation programme:
Wildlife can be studied to help people understand about the environment.
There will be more plants and animals.
The wildlife will not become extinct.
To maintain the natural beauty of the world.
The disadvantages of a conservation programme:
Wildlife stops us from constructing things.
Are they worth saving?
Do they do anything for us?
I think that conservation programmes are good and bad. I think that some animals have a very good reason to be conserved but others don't. Giant pandas don't really have a good reason to be conserved because they only eat one type of food, which doesn't grow very much. Also there is only a very small chance that they will reproduce without human interference. There are more effective conservation programmes (tigers).
Why i think this
I think this because although the giant panda is endangered, there may be other species that need more help than the giant panda, tigers for example. I still think that they deserve some help however, other animals might need more help.
The four causes of extinction are habitat destruction, poaching, pollution, and global warming. Habitat destruction is when a habitat can no longer meet the needs of its residents. Humans contribute to habitat destruction by logging.
Poaching is illegal killing or capturing of an animal. People poach to get skins and other parts that may be used for clothing, food, folk medicine, jewelery, and trophies. Mostly people poach for money, it is usually poorer countries that have the worst poaching problems, but even in Britan poaching goes on.
Pollution means any contamination of air, soil, water and environment. These affect animals by creating diseases that can lead to death. Litter can also lead to death for many animals because of the toxic substances in litter.
Global warming means the earth is warming up. This affects many plants and animals in the world. These animals are suited to living in cold temperatures but now they're habitats are heating up. This makes a lot of things hard to do.
The Woolly Mammoth became extinct because of climate change around 10,000 years ago. The earth began to heat up, and it became difficult for the Woolly Mammoth to live, as they had evolved to live in colder conditions. Also they were herbivores so they were depending on gaining all the nutrients they needed to survive from the plants that they ate. However the climate changed so some of the vital plants they ate had died out. Another reason for the Woolly Mammoth to become extinct was because of humans. Humans hunted them for their meat, bone and skin. These are the main two reasons that the Woolly Mammoth is now extinct.
Extinct animals and plants
The Dodo bird became extinct because Dutch sailors ate the bird to extinction, after finding that the bird was incredibly easy to catch, due to the fact it had no fear of humans. The dodo was not a fast moving bird, so this made it easier for all predators. Also humans introduced new species including dogs and pigs, these animals also hunted the dodo bird and its eggs.
The Dodo bird
All Tigers are endangered and come from some of the coldest regions of Asia and some of the hottest. They are becoming endangered because humans are starting to hunt them and use parts of their body: paws, fur, tails, teeth and heads. They use these items for accessories and then sell them overseas and get a lot of money for them. This has been happening a number of years now.Also the tiger’s habitat is being destroyed due to elements of deforestation.
Endangered animals and plants
Giant pandas are dying out mainly because of habitat loss. Their main source of food is bamboo, which takes a long time to grow. Pandas are endangered because the area they live in are being destroyed by farmers. There's also large-scale developments that are taking place in the Giant Pandas habitat. Large scale developments include building roads, mining and enlarging towns and cities. As well there is only a small possibility that thy will reproduce.
The Venus fly trap is endangered because people are interested by their unusual qualities; therefore they are taking them from their natural habitat and having them in their homes. In people's homes it’s a different climate so they die easily. This is why there endangered.
Venus fly trap
The Rafflesia flower is endangered because rainforests are being destroyed that it lives in. We can prevent this by not cutting down the rainforests. Deforestation happens all over the world and it should be stopped.
One cloning process is called the Somatic Cell Nuclear Transfer (scnt). This produces an exact clone, or genetic copy, of an individual. This was the method used to create Dolly the Sheep. Dolly the sheep was one of the first clones done by mankind.
To clone in this way, scientists isolate a somatic cell from an adult female animal. Next, they transfer the nucleus from that cell to an egg cell which they have removed the nucleus from. After a couple of chemical tweaks, the egg cell, with a new nucleus, is acting just like a freshly fertilized egg cell. This is then implanted into a surrogate mother who then carries the baby until she gives birth.
How it's done
Conservation programmes affect a lot of animal’s lives. WWF affect animals lives every day. There are conservation programme for tigers. They aim to double the amount of tigers by 2022 and I believe that they will. They also work alongside TRAFFIC (the wildlife trade monitoring network) to crack down on the illegal trade in tiger products. This is a very affective conservation programme.
WWF have been involved in rhino conservation for nearly 50 years. When they started there were only 8,500 white rhinos and 2,500 black rhinos in the wild. Now there are over 20,000 white rhinos and 5,000 black rhinos in the wild.
This proves that conservation does help and affects many animals all over the world.
What would happen if tigers were extinct
Tigers are at the top of the food chain. They eat deer, pigs, antelope and buffalo. If tigers were to die out there would be too many deer, pigs, antelope and buffalo. If there were more of these animals then they would eat all the food that would supply for other species. This would make more species endangered.