Endangered Animals

Чтобы посмотреть презентацию с оформлением и слайдами, скачайте ее файл и откройте в PowerPoint на своем компьютере.
Текстовое содержимое слайдов:

Endangered AnimalsВыполнил: Филяев ВладиславМАОУ СОШ №67 с УИОПУчитель: Шадрина Наталья НиколаевнаEkaterinburg, 2013 Filiaev VladI am a pupil of the sixth form. I am 12. I like a lot of different animals. I’m doing my best to study well. I’ve had a lot of animals such as cats, dogs, guinea pigs and a parrot. I try not to destroy wildlife and its inhabitants. Causes of endangermentEndangerment is a broad problem. It cannot be solved until humans protect the natural environments where endangered species live. There are many reasons why a particular species may become endangered. They appear repeatedly. They are the following:Habitat destructionOverexploitationIntroduction of exotic speciesMore factors Habitat DestructionOur planet is constantly changing, causing habitats to be altered and modified. Natural changes tend to occur slowly. However, when changes occur at a fast pace, there is little or no time for individual species to react and adjust to new circumstances. This can create disastrous results. Thus, rapid habitat loss is the primary cause of species endangerment. Humans are largely responsible when animals become extinct, endangered or threatened. People destroy precious habitat--the natural environment of a living thing--when they fill swamps and marshes, dam rivers and cut down trees to build homes, roads and other developments. Introduction of Exotic Species Native species are those plants and animals that are part of a specific geographic area, and have ordinarily been a part of that particular biological landscape for a long period of time. They are well adapted to their local environment. Exotic species, however, are interlopers. They arrive into a new habitat from a foreign place and sometimes introduce diseases that the native species can't fight. These "exotic" species can also prey on the native species. Exotic species can alter the natural habitat and can cause a greater competition for food. The most destructive effects have occurred on islands. Introduced insects, rats, pigs, cats, and other foreign species have actually caused the endangerment and extinction of hundreds of species during the past five centuries. Overexploitation Animals can become endangered or even extinct due to the rate in which the species is being used. Unrestricted whaling during the 20th century is an example of overexploitation. Due to the trade in animal parts, many species continue to suffer high rates of exploitation. Even today, there are demands for items such as rhino horns and tiger bones in several areas of Asia. More FactorsDisease, pollution, and limited distribution are more factors that threaten various plant and animal species. The black rhinocerosPopulation: The number of black rhinos has actually increased to 4,000 over the past couple of years Lifespan: 35-50 years Location: Eastern & South Africa Threat Level: Critically endangered Endangering Factors: The biggest threat to black rhinos have been vigorous poachers who seek after their unique horns, which are used in traditional Chinese medicine as well as ceremonial daggers. Cheetah Population: There are an estimated 12,500 cheetahs left in Africa Lifespan: 12-14 years Location: Africa and southwestern Asia Threat Level: Vulnerable Endangering Factors: Poor genetics, birth defects, and excessive hunting have caused the total number of cheetahs to diminish. Blue WhalePopulation: Rough estimates indicate there are 10,000 - 12,000 living Blue Whales, possibly more Lifespan: 60-80 years Location: Antarctic, Indian, Pacific, & Atlantic Oceans Threat Level: Endangered Endangering Factors: Excessive hunting, collisions with vessels, and getting trapped in fishing gear are all factors believed to have a negative effect on the overall Blue Whale population. Protection MeasuresMany scientists and ordinary people work to save endangered animals. Conservation of the endangered animals is being done in 2 ways:Captive breedingPrivate farming Captive breedingCaptive breeding is the process of breeding rare or endangered species in human controlled environments with restricted settings, such as wildlife preserves, zoos and other conservation facilities. Captive breeding is meant to save species from extinction and so stabilize the population of the species that it will not disappear . It has worked for many species for some time. However, captive breeding techniques are usually difficult to implement for such highly mobile species as some migratory birds (e.g. cranes) and fishes (e.g. hilsa). Private farming It is legal, for-profit and private. There are strong economic incentives attached to looking after animals : from eco-tourism or selling them on for a profit. So many owners are keeping them secure. It has substantially increased the populations of the southern black rhinoceros and southern white rhinocerosIn 2009, researchers in Australia first saw southern bluefin tuna to breed in landlocked tanks, enabling fish farming to save the species from overfishing. Literaturehttp://www.endangeredspecie.com/causes_of_endangerment.htmhttp://en.wikipedia.org/wiki/Endangered_specieshttp://library.thinkquest.org/11353/e-animals.htmhttp://www.animaldanger.com/endangered-animals.phphttp://www.fws.gov/endangered/esa-library/pdf/ESA_basics.pdfhttp://worldwildlife.org/

Приложенные файлы

  • pptx file06
    Размер файла: 319 kB Загрузок: 0