Why is the flora and fauna of Australia so unique? Evolution is ultimately an unpredictable process. Although it can be predicted in the short term through knowledge of natural selection and inheritance‚ long term evolution is randomly altered by the interaction of highly variable factors. Such factors include the randomness of genetic diversity within a species and the process of natural selection acting upon this. Also significantly altering evolution is the unpredictable movement of tectonic plates
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The Australian land and its flora and fauna are very unique compared to other continents. There are three main reasons for this‚ biological isolation‚ geological stability and the erratic climate. Firstly biological isolation has meant that over the last 40 million years Australia has been separated from all other continents‚ this was the cause from the separation from Gondwanaland around 55 million years ago. This means the Australian flora and fauna has been able to evolve in isolation
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Modern-Day Plague Deforestation is clearing Earth’s forests on a massive scale‚ often resulting in damage to the quality of the land. Forests still cover about 30 percent of the world’s land area‚ but swaths the size of Panama are lost each and every year. The world’s rain forests could completely vanish in a hundred years at the current rate of deforestation. Forests are cut down for many reasons‚ but most of them are related to money or to people’s need to provide for their families.The biggest
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Effects of Deforestation The subject of deforestation and the effects that it has on the environment have been heavily debated for a long time; particularly over the last few years. Governments and large lumber companies see large profits in the mass deforestation of forests and state that their actions are having few‚ if any‚ harmful effects on the environment. Most people disagree with this and think that the environmental effects are devastating and will become irreversibly disastrous in the
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Lesson II – Effects of Deforestation Deforestation is the removal or destruction of large areas of forest or rainforest. Deforestation happens for many reasons‚ such as logging‚ agriculture‚ natural disasters‚ urbanization and mining. There are several ways to clear forest -- burning and clear-cutting the land are two methods. Although deforestation occurs worldwide‚ it’s a particularly critical issue in the Amazon rainforests of Brazil. There‚ the tropical forests‚ and the species of plants and
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The Causes and Effects of Deforestation Deforestation is becoming more and more popular in many countries all over the world. “Based on environment statistics‚ more than half of the trees in this world are gone due to human activity” (Nayak‚2008)‚ this action has been direct influences on mankind lives. Therefore‚ the causes and effects of deforestation is one of the most interested problems at the present time. There are some main reasons why deforestation is happening increasingly. I have
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than 50 percent of the tree cover has disappeared due to human activity. Although humans have been practicing deforestation since ages‚ it was in the mid-1800s that forests began to be destroyed at an unprecedented rate. As a matter of fact‚ throughout the earlier part of the medieval age‚ Europeans used to live amongst vast areas of forested land. But later‚ they began deforestation at such a high rate that they started to run out of wood for cooking and heating. Also‚ due to the depletion of
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What are the Causes and Effects of Deforestation? Deforestation involves the cutting down‚ burning‚ and damaging of forests. Deforestation can be defined as the change of forest with depletion of tree crown cover more than 90%. However‚ depletion of forest tree crown cover less than 90% is considered forest degradation. Causes of Deforestation: The main causes of deforestation are summarized below: (i) Population explosion (ii) Agriculture: shifting cultivation‚ overgrazing‚ cash crop
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will be lost over the next two decades” (From “Last of the Amazon” by Scott Wallace). Deforestation can be caused by many things‚ natural or unnatural. The number one cause can be said to be illegal logging or erosion‚ but we all know that is not it. Deforestation in the world is caused by man and the effects are devastating to the environment and can also effect global warming. Man can cause deforestation because of his greediness to want everything. For example‚ loggers in the Amazon are illegally
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Causes and Effects of Deforestation Here are some of the main causes and effects of deforestation. Ads by Google Air Pollution Control Jet & High Energy Venturi Scrubbers Packed Towers-EtO/PO/NOX Removal www.croll.com Trees are one of the most important aspects of the planet we live in. Trees are vitally important to the environment‚ animals‚ and of course for us humans. They are important for the climate of the Earth‚ as they act as filters of carbon dioxide. Forests are known as habitats
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