Causes of Animal Extinction and Disappearing Species

Causes of Animal Extinction and Disappearing SpeciesNewler argues that, animals become nonextant when they better and no longer exist at that death of the only animate components of the species. Extinction simply means to be away forever. The deal takes orient over a period of time. A species may be regarded to as function entirelyy nonexistent before it is fully extinct when only a few of them exist. The existing group is for one reason or another(prenominal) unable to throw up and propagate the species, hence termed as functionally extinct. The process begins from the time when the death rate is higher than the birthrate. The proceeds of animals then belatedly decreases to extermination, (Newler, 102).Newler also adds that in biology quenching is the end of a apt(p) species of animals in an ecosystem. Though not documented, scientist believe that 99.9% of the species that stimulate existed before have so far been extinct. A certain species of animals may get extinct b ecause it cannot survive in the changing environsal specialises allowing only the species that ar rise up adapted to the environment to survive. This shows that in that respect are certain ingrained factors inwardly the environment that causes extinction, (Newler, 102).According to Manwel, a subdue of animals that existed several historic period ago have since been extinct. These include tyrannosaurus Rex (extinct 65 jillion years ago), Stellers ocean cow the defenseless beast (extinct since 1768), Thylacine the Tasmanian tiger (extinct sinning 1936), Quagga half Zebra, half Horse (extinct since 1883), Irish Deer the largest cervid that ever lived (extinct ab break through(predicate) 7,700 years ago), Caspian Tiger the third largest (extinct since 1970), Aurochs a very large type of cattle (extinct since 1627), Great Auk largest of all Auks (extinct since 1844), weaken Lion one of the largest lions ever (extinct since 2,000 years ago) and Dodo the archetype of extinct species (extinct since late 17th century), (Manwel, 75)Causes of animal extinctionAlthough some cases of animal extinction is attributed to natural factors within the environment, it is however evident that tender-hearted activities play a very key role in the process. Scientists have studied the human activities that causes immense environmental changes which makes the environment unfit for the existence of a peculiar(a) species of animals. Since humans have become the dominant species on earth, increase in human activities leads to exploitation of the resources within the environment and leads to firing offs that may cause sobering climatic changes which reduce the chances of survival of the animals. Some of the causes of extinction include the following. orbicular heating systemAccording to Manwel, there is a close association amongst spheric warming and extinction of animal species on earth. Scientist argue that 251 million years ago, life on earth nearly came to an end w hen there was mass extinction that saw the death of over 90% of all species on earth. This was caused by a volcanic eruption that caused an increase in atmospheric temperatures by 6 oC setting off a babys room effect that led to the mass extinction. The greenhouse effect was caused by the waiver of carbon dioxide from the volcanic eruption. The accumulation of carbon dioxide in the atmosphere creates greenhouse effect, (Manwel, 77).Ruckler adds that with the increase in human activity and industrial advancements lead to the emission of carbon dioxide in the atmosphere which causes greenhouse effect. As the levels of carbon dioxide increases, the enjoin of its effectuate on the planet becomes more glaring. At present, a number of animal species are at the verge of extinction because of the serious environmental changes cause by global warming. Global warming leads to increase in atmospheric temperatures and reduces the amount of oxygen both in the atmosphere and the wet bodies. This greatly affects the existence of animals. For example, when the amount of oxygen dissolved in urine is cut back, anaerobic bacteria increases and the number of the other aquatic animals reduces drastically. Global warming also affects migration of animals, hatching of eggs and distribution of animal species in the planet. at that place is factual evidence that global warming is tied with animal extinction. In Australia for example, White Possum is believed to be extinct as a closure of global warming. The animal died because it could not withstand the high temperatures, (Ruclker, 56).Overhunting and over tipingAccording to Raloff, overhunting refers to the harvest-home of wild animals beyond the growth rate of the people such that the number population of the animals gradually reduces. Both overhunting and over seek reduces that number of animal species. For example, a number of fish species are facing extinction because of overfishing. Overhunting in the high seas has reduced significantly the population of whales, sea turtles, sea cows and other fish species, (Raloff, 23).Most humans hunt for wild animals for their hides and meat. homophile encroachment into the timberland and new habitat has seen the extinction of animal species. In North America, 11,000 years ago, when people first migrated from Serbia to Alaska, it is thought that some species of animals including the mastodon, mammoth and Saber-toothed tiger became extinct within a few centuries because of hunting and resource exploitation.The effects of global warming are evident from the extinction of a member of the primate group in Ghana and Ivory Coast. The red colobus monkey and the red-checked monkey became extinct from the African forest because overhunting and destruction of its habitat brought about by human inhabitance.Raloff argues that in the past, the extinction of animals such as elephant birds and lemurs in Madagascar, kangaroos in Australia, Moas in New Zealand, herbivore s in America are overhunting. run poses major threat to animals and has lead to the increase in the number of menace species. The most endangered groups of animals in the world today are the mammals and birds. For mammals the important disadvantage they have is that they are big (require more food and water) and re take a leak at a diminisher rate hence they can be easily wiped out through overhunting. Birds are susceptible for overhunting because of their conspicuous nature. This makes the both goops the most endangered groups in the modern world, (Raloff, 23).Habitat degradationManwel and Mwenda pointed out that most animals live well in given set of condition provided in a given habitat. Habitat degradation means that the conditions are altered making it unsuitable for animal inhabitance which may cause the extinction of a species of animals, which directly depend on the environment for food and shelter. The environment is changing from time to time in a slow pace. Human act ivities cause rapid changes in the environment to the disadvantage of animals which are slow to adapt to the fast changing environment. Increase in agriculture, mining, logging and fishing are just but a few human activities that rush the extinction process through environmental degradation, (Mwenza, 96).Habitat degradation may cause extinction of animal species either directly or indirectly. The industries and farms produce a lot of toxic products. The effects of these products include reduced generative capacity, short life span and reduces that ability of the animals to survive the environmental conditions. The accessibility of food and shelter from the environment is reduced by habitat destruction.OverpopulationManwel and mwenda say that overpopulation in animals stiffens the competition for food and shelter. When the population of animals is higher than the carrying capacity of a given ecosystem, there will be a shortage of resources which unimpeachably leads to the death of some animals. Overpopulation leads to overexploitation of the existing resources. When there is overpopulation of predators, the population of the course reduces to and becomes one of the endangered species. If the increasing population of the predators is not controlled, the prey in brief becomes extinct, (Manwel and Mwenda, 29).ConclusionThe number of endangered species in animals increases with time. This means that the total population of animals on earth reduces gradually. A number of animal species are nowadays facing extinction. The main causes of extinction can be either natural causes or human activities that affect those animals directly or indirectly. The causes include global warming, overhunting and overfishing, overpopulation and habitat degradation. The main effects of these factors is that they endanger some animals species.Work citedManwel, Paula. and Mwenda, J. Earths threaten Creatures. 5th ed. New Jersey Prentice-Hall, Inc, 1998.Newler, Martin. Disappearin g Species. London McGraw-Hill publishers, 2000.Raloff, Geoffrey. Extinction and environmental Changes. 2nd Ed. Boston Allyn Bacon publishers, 2004.Ruckler, Benjamin. Species Disappearing at an Alarming Rate. (3rd Ed.). New York backside Wiley Sons, Inc, 2006.