The Extinction of Species: Expository Essay Sample - AhlynewsInfo

The Extinction of Species: Expository Essay Sample

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    Homepage > Writing Samples > Academic Writing Samples > Essay Samples > Expository Essay Samples > The Extinction of Species

    03 Oct ’16
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    It is not a secret that the ecological situation on our planet is rather complicated. Apart from the common worries about global warming, industrial pollution, and rain forests being cut down, there is also the huge problem of the extinction of species; and while humanity can, hopefully, somehow stop the processes it is directly causing, it is unclear whether this extinction can be prevented or at least slowed down.

    Although the words “mass extinction” definitely sounds alarming, it is not something uncommon for our planet. At the moment, we are witnessing the sixth mass extinction of species. During the past 500 million years, there already were five mass extinctions (with the largest of them being the Permian-Triassic and the Cretaceous-Tertiary extinctions, 245 and 65 million years ago respectively), causing from 14% to 84% of the genera or families to completely disappear from the fossil record. During the first of them, the majority of the marine invertebrates, as well as a huge number of terrestrial plants and insects disappeared; the second one mostly affected the dinosaurs. Even in a relatively not-so-distant past, some animal species had gone extinct completely: about 11 thousand years ago, during the Pleistocene-Holocene period, about 100 terrestrial species died out, including mammoths, saber tooth tigers, rhinos, and some birds (NCBI).

    Moreover, there are two kinds of extinction: the one after which there is no “replacement” of an extinct species with a new, more adapted one—the “dead-end extinction” which is basically the end of a certain evolutionary lineage; and taxonomic extinction, which implies that during the evolutionary process, certain species had changed to such an extent that they should be considered a different species (NCBI).

    Currently, there are 14,000 to 35,000 endangered species only in the United States; 16,928 species worldwide stand on the edge of dead-end human-caused extinction, and in order to save them, a significant amount of effort should be made. This is especially difficult considering the fact that every species’ extinction can lead to the disappearance of other species that are somehow bound to it: for example, if bees die out, many types of plants will not be able to reproduce, and will have either to adapt quickly, or will have to vanish. Such changes tend to accumulate astonishingly fast. Throughout the last five centuries, about 1,000 species of all possible sizes and shapes have gone completely extinct: huge mammals such as woodland bison of West Virginia and Arizona, US: passenger pigeons and Culebra parrots; Rocky Mountain grasshoppers, and so on. And this is just those of them that we can see relatively easy; it is probably impossible to calculate how many kinds of microorganisms disappear every day before scientists even get a chance to discover and study them. The size does not matter for nature: the tiniest organism is as important for the ecosystem as the largest of mammals (Center for Biological Diversity).

    The good news is that it is in fact possible to not only slow down extinction, but to save some species from the danger of vanishing. In the early 1990s, there was a program of reintroducing captive-born condors to their natural environment in California, Arizona, and northern Mexico. Before the program was launched, there were about 20 of these condors left; currently, there are more than 200 of these birds inhabiting their “original” environments. The condor’s recovery, as well as some other examples, shows it is possible to move some species away from the extreme brink. For example, gray wolves, who were almost completely killed during hunting across the whole North America by the end of 1970s, are now a relatively prosperous species counting around 3,500 specimen. Northern elephant seals are nowadays numbered around 150,000 along the West Coast, although there were fewer than a hundred of them left alive just recently. All this became possible due to the significant efforts of reintroduction (National Geographic).

    Moreover, with the power of science, it is possible not only to reintroduce endangered animals to their natural environments, but to bring back those of them that are believed to have completely disappeared. New discoveries in genetics, in particular the advancements connected to CRISPR-Cas9, give humanity hope of bringing back animals considered to have disappeared forever. Ecologists at the University of California, Santa Barbara, believe the two species that would be especially reasonable to resurrect are the woolly mammoth, the last of which died about 4000 years ago, and the passenger pigeon, a gray bird with a red breast, once common all over North America and, which had gone extinct in early 1900s. Scientists believe that due to technological progress, the chances of such de-extinction, so to say, are high, so the question is not “if,” but rather “when” this will be done. Both of these species were functionally unique species strongly affecting their environments, so their vanishing had changed the ecosystems they lived in as well. George Church, the lead researcher working on the resurrection of a mammoth in Harvard University, believes these precursors of modern elephants would help turn the modern Arctic tundra back to grasslands: mammoths used to contribute to grasslands’ spreading by knocking down trees and spreading grass seeds in their dung. In their turn, the passenger pigeons were extremely important for the forests they lived in as well (ScienceMag). Reviving these two species will likely solve a number of ecological problems in an effective and quick way.

    As it can be see, mass extinction is not something that had never happened before on Earth. Currently, we are witnessing the sixth mass extinction, with the main difference being the human factor greatly contributing to species’ disappearance. There are ways, however, to slow down or even turn back the processes of extinction; one of them, the more traditional one, is the reintroduction of cage-bred species to their natural environments. The other more advanced one involves the most recent advancements in genetics, and will probably allow scientists to resurrect animals believed to have gone extinct forever. Thus, there is still hope for planet Earth.

    Works Cited:

    1. National Research Council (US) Committee on Scientific Issues in the Endangered Species Act. “Species Extinctions: Extinctions Over Geological Time.” NCBI. U.S. National Library of Medicine, n.d. Web. 27 Sept. 2016.
    2. “The Extinction Crisis.” Center for Biological Diversity. N.p., n.d. Web. 27 Sept. 2016.
    3. “20,000 Species Are Near Extinction: Is It Time to Rethink How We Decide What to Save?” National Geographic. National Geographic Society, n.d. Web. 27 Sept. 2016.
    4. “Should We Bring Extinct Species Back from the Dead?” ScienceMag. N.p., 26 Sept. 2016. Web. 27 Sept. 2016.
    essay about life , essay about nature , science essay

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    – Introduction Biodiversity is the grand diversity of all life on Earth and the interconnections that support these forms of life. This astonishing diversity supports the human existence by providing numerous priceless resources such as food, fuel, and medicine. Many of these resources can not be duplicated by the human race. For these reasons it is obvious that the environment and the biodiversity that it supports are detrimental to human survival. There is one major problem that is growing each day, and that is the amount of biodiversity, along with the services and benefits that is provides is diminishing….   [tags: Biology]


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    Language Extinction

    – Introduction. Language extinction is a well-known subject among linguists. It has happened since the beginning of human language and, no doubt, it will continue till the end of the time. But in contemporary world this phenomenon has acquired a distinctive feature as it runs beside globalization. Nowadays we are spectators facing the death of languages which have been able to survive throughout centuries but cannot deal with the new challenges brought by the global village. The variety of Catalan spoken in the Italian city of Alghero, in the west coast of the Mediterranean island of Sardinia, known as Algherese, could be considered an endangered language and, consequently, facing extinction w…   [tags: Catalan, Sardinia, Algherese, linguistics]


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    Examining the Cretaceous: Paleogene Extinction Event

    – … Some paleontologists believe that the global ecosystem had already been on decline before the final blow, an asteroid, destroyed much of life on earth. Continental drift and seafloor spreading may have shifted oceanic circular patterns, causing dramatic changes in sea level and the earth’s climate. Also, the end of the Cretaceous period, immediately preceding the K-Pg, saw many volcanic eruptions; the dust and gases released are thought to have caused great environmental changes. However, the tipping point occurred when the Chicxulub asteroid slammed into Earth releasing energy “a billion times more than the atom bombs that destroyed Hiroshima and Nagasaki,” (Choi, 2013)….   [tags: dinosaur, ecosystem, disasters, astoroid]


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    Researching the Decline of Shorebirds and Their Risk of Extinction

    – Policy- and decision-makers claim information about the causes of population declines which drive species on the brink of extinction. However, it is pointed out that the causes of vulnerability remain unclear to explain the variation to the risk of extinction. According to Reynolds (2003), vulnerability is determinate by both the decline of species population and the reduction of their geographical range. These two forms of vulnerability are affected by species intrinsic biological traits, extrinsic human induced effects and adverse factors….   [tags: animal science]


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    Language Extinction: Melanisian

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    Why We Should Stop Extinction

    – The extinction of indigenous animals has been an ongoing problem that has not received the attention it deserves. Biologists have studied the pattern of mass extinction with growing concern. The world’s species are declining at a rate 10,000 times faster than normal according to a census of the world’s species (Dugan). What is causing such a rapid increase in extinction is unknown however there is one thing that is indisputable: human interference is playing a direct role. Poaching is the illegal hunting, killing or capturing of animals….   [tags: biology, zoology, animals]


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    Extinction On Dinosaurs

    – Theories of the Extinctions of the Dionsaurs: Dinosaurs became extincted 65 million years ago, at the end of the Cretaceous period, something so devastating that it altered the course of life on earth. It seems like it happened so sudden, as geologic time goes, that almost all the dinosaurs living on earth disappeared. So how did these dominant creatures just die off. Was it a slow extinction, or did it happen all of the sudden. These questions bring rise to many different beliefs on how the dinosaur disappeared over 65 million years ago….   [tags: essays research papers]


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    Are We On The Cusp Of The Sixth Mass Extinction Event?

    – We are on the cusp of the sixth mass extinction, as estimated the event to be occurring within 2200 years. Scientists have evidences supporting this statement with the extinction rates and magnitudes, and comparing the present conditions to the past “Big Five”—the previous five mass extinction events. Mass extinction is generally known as the forever disappearance of 75% of lives in the globe, therefore species lost is the main driver of such extinction events. With the current high extinction rates and increasing trend of extinction magnitudes, the sixth mass extinction is expected….   [tags: Volcanic Eruption, Climate Dynamics]


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    Are We on the Cusp of the Sixth Mass Extinction Event?

    – As titled: Are We On The Cusp Of The Sixth Mass Extinction Event. Yes, we are indeed, as we, here defined as all the lives on the Earth at the moment. Mass extinction is times when the Earth loses more than three-quarters of its species in a geologically short interval (Barnosky et al., 2011). In addition, according to the Oxford Dictionary of Geology and Earth Sciences edited by Michael Allaby (2013), mass extinction is defined as the Earth has been taken place environmental catastrophe, removes many groups from environment from record and not replaced, and ecosystems collapse….   [tags: environmental catastrophe, Geology]


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    Theories of the Extinction of the Dinosaurs

    – Theories of the Extinction of the Dinosaurs Controversy surrounds the extinction of the dinosaurs. According to one theory, dinosaurs were slowly driven to extinction by environmental changes linked to the creeping withdrawal of shallow seas from the continents at the end of the dinosaur era. Proponents of this theory propose that dinosaurs dwindled in number and variety over several million years. An opposing theory proposes that the impact of asteroid or comet caused catastrophic destruction of the environment, leading to the extinction of the dinosaurs….   [tags: Papers]


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    The Permian-Triassic Extinction Event and It’s Effects on Life on Earth

    – Introduction The Permian-Triassic extinction event is undoubtedly the largest extinction event the Earth has ever seen. While evidence shows that it occurred over a great amount of time, it was effective in causing the extinction of an incredibly large portion of life on Earth. To such an extent that it took millions of years before any large amounts of biodiversity occurred again. This is why it is also referred to as the ‘Great Dying’. This paper will will analyze the survivability of terrestrial vertebrates compared to that of terrestrial invertebrates during the Permian-Triassic Extinction Event….   [tags: biodiversity, marine life, terrestrial life]


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    The Cause of the Dinosaur Extinction

    – The Cause of the Dinosaur Extinction The biggest mystery surrounding the dinosaur is how did they die. For over 130 million years dinosaurs ruled the earth. Then 65 million years ago, at the end of the Cretaceous period, they died out. Nobody can really say what actually eliminated the species, although everyone has their very own idea. Asteroid impact, atmospheric changes (hot to cold), catastrophic eruptions and astronomical events (supernovas etc.). Some have ventured that early mammal inhabitation slowly “pushed” the dinosaurs to extinction….   [tags: Papers]


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    The Permian-Triassic Extinction 250 Million Years Ago

    – The Permian-Triassic Extinction is a mass extinction that occurred between the Permian and Triassic geologic time periods approximately 250 million years ago; it is the deadliest of all extinctions that have occurred on Earth. In addition, during the Permian-Triassic extinction the continents of today existed as one supercontinent known as Pangaea. This was the first time in history where continental or land mass exceeded that of the ocean. This was also before dinosaurs of the Triassic period roamed Earth, during this time animals such as the therapsids, and Synapsids such as the Pelycosaurs, insects and amphibians also occupied Earth….   [tags: Pangaea, Perish, CO2]


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    Contrasting Theories on the Extinction of Dinosaurs

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    The Role of Fungus in the Extinction of Dinosaurs

    – The Role of Fungus in the Extinction of Dinosaurs The debate over what ultimately killed off the dinosaurs is an area of great interest to not only scientists, but everyone. The dominant thought seems to be that an asteroid struck the earth at the end of the Cretaceous period and killed off much of the fauna and flora inhabiting the earth. However, the sequence of events following that mass extinction has been fairly blurry until a recent discovery, published in a recent issue of Science, by paleontologists Vivi Vajda and Stephen McLoughlin….   [tags: Anthropology Essays Paleontology Papers]


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    Hypotheses on the Extinction of Dinosaurs

    – Hypotheses on the Extinction of Dinosaurs In the early nineteen hundreds, dinosaur fossils were discovered and recognized around the globe. Greedy scientists and civilians, searching for their own prize skeleton, rushed to rip bones out of the ground, destroying the fossils as they went. It was not until later in the century that scientists and paleontologists began pondering how such widespread creatures disappeared. Currently, paleontologists debate the two main hypotheses of how the classic dinosaurs died: from volcanic activity or an asteroid impact….   [tags: Exploratory Essays Research Papers]


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    Mass Extinction in the Precambrian

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    On the Extinction of Voluntary Memory

    – On the Extinction of Voluntary Memory Absolute certainty is a term that can rarely, if ever, be applied in any realm of human endeavor. In science, there is always a limit of precision to which any measurement can be taken. In literature, the fact that the author’s language merely represents his ideas (as opposed to embodying them) leaves such conveyed ideas open to a degree of interpretation. More important than these factors, though, is that the greater part of what we today regard as knowledge is founded in theory….   [tags: Memory Psychology Psychological Papers]


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    The End Permian Mass Extinction

    – IntroductionThink of a world which existed 290 million years ago. As you look out over the terane in front of you, you think that you are on an alien planet. You see volcanoes spewing ash and lava. Beside them is the ocean which is swarming with many different species of echinoderms, bryozoans and brachiopods. As you look down onto the sea floor you are amazed at the countless number of starfish and urchins. Some animals leave you can’t even describe and you have no idea even what phylum they belong to….   [tags: essays research papers fc]


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    The Process of De-extinction and Its Ecological and Moral Consequences

    – Imagine going to a local zoo and seeing fantastic extinct and endangered species previously showcased only in museums. Like the scientists in the movie Jurassic Park, the idea of bringing back an extinct species is indeed possible. Every year, thousands of species go extinct that we haven’t even discovered yet. With this, several groups are currently working on the process of de-extinction. However, the process of bringing back an extinct species is fairly difficult compared to the cloning of extant animals….   [tags: interspecies nuclear transfer]


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    The Endangerment and Mass Extinction of the Tiger: Can We Stop It?

    – Several species on Earth are on the endangered species list and are given special protection to insure the species survives. Sometimes the protection of these species is not enough for the guarantee of survival. Many factors including human activity, and the failure of the species to adapt to change has caused the population of the majestic tiger to dwindle. Despite laws such as the Endangered Species Act of 1973, countries all over the world have failed to help this dying species. The editorial, “Tigers are tanking,” published by Globe & Mail, explains that tigers will be extinct in little as 12 years (Tigers are tanking)….   [tags: environmental issues, endangered species]


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    The Fax Machine – A Constantly Evolving Technology Dodging Extinction

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    The Guam Rail Should Be Saved from Possible Extinction

    – The Guam Rail or Ko’ko bird is a flightless bird which was endemic to Guam. The Guam Rail is mostly brown with white stripes on its stomach. It grows up to a height of 30cm and is omnivorous. There used to be as many as 10,000 Guam Rails on the island and they were easily spotted. However, during World War II, the Brown Tree Snake (Boiga irregularis) came to Guam and devastated native bird populations. The Guam Rail was one of the native birds that were annihilated. In just 30 years, the Guam Rail population plummeted to just 21 birds….   [tags: Endangered Species, Extinct, Birds]


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    Escaping Extinction – The Amer

    – ESCAPING EXTINCTION Much has been written, and even more said, about what constitutes the Canadian character, what identifies the quintessential Canadian. Two features clearly emerge as dominant elements in the make-up of both English and French-speaking members of our family: Canadians are constantly brooding over who we are, what gives us our Canadian character, and what makes us different from other nations. Most other nations never think about such things, or take the answers for granted….   [tags: essays research papers]


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    Whaling is Killing Thousands, Bringing Whales to Near Extinction

    – … Japan has been using this excuse, among many others, since 1986. In the decades Japan has used this excuse, it seems almost ridiculous that Japan has not learned anything new about the mammals’ breeding, migratory, or any other habits. When Australia took Japan to the International Court of Justice to challenge the validity of Japan’s scientific whaling industry, Australia’s agent to the court, Bill Campbell, stated, “Japan seeks to cloak its ongoing commercial whaling in the lab coat of science.” He later told journalists: “You don’t kill 935 whales a year to conduct scientific research….   [tags: legislation, commerical, survival]


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    Help Save the Amur Leopard from Extinction

    – The Amur leopard is native to the Primorye region of southeastern Russia and Jilin Province of northeast China, and is classified as Critically Endangered since 1996. Only 14–20 adults and 5–6 cubs were counted in a census in 2007, with a total of 19–26 Amur leopards in the wild. The Amur leopard is also known as the Far Eastern leopard. Characteristics Amur leopards have a thick coat of spot covered fur. Leopards from the Amur River basin, the mountains of north-eastern China and the Korean peninsula have pale cream-colored coats, particularly in winter….   [tags: territory, development, russia]


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    Theories on Dinosaur Extinction

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    extinction of great apes

    – The great apes are humankind’s closest relatives. Great apes include gorillas, chimpanzees, orangutans, and bonobos, which are also known as pygmy chimps. At the turn of the century, there were approximately one million chimpanzees in Africa. This number has declined down to 150,000. Mountain gorillas have halved in size over the last ten years, leaving only 320 to roam the trees of their homeland. Some say these great apes will face extinction within a decade. Why is this the case and should we let this happen….   [tags: essays research papers]


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    Dinosaur Extinction

    – A number of different theories have been assessed throughout the course of this research to attempt to reach a conclusion as to the reason behind the extinction of the Tyrannosaurus Rex. Although all arguments are credible, and supportive with educated information and data, the most conclusive theory of all is The Alvarez Asteroid Impact theory. Alvarez, a researcher at the University of California, discovered a pencil thin layer of Iridium around the rocks in Gubbio, Italy. (New Scientist, 1) Iridium is an element found in meteorites and asteroids….   [tags: essays research papers]


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    Neanderthal Extinction

    – Neanderthal Extinction   Neanderthals and modern humans coexisted for well over 100,000 years.  Then suddenly Homo neandertalensis began to die out and surrender the earth to Homo sapiens.  Paleontologists and anthropologists have entertained several possibilities to the causes of this event: interbreeding among Neanderthals and humans, competition for natural resources, and Darwin’s theory of “survival of the fittest.”  What the real cause has been has plagued scientists for years. Now, due to an international research team from Germany, those possibilities have been even further deduced, making it easier to pinpoint the exact reason Homo neandertalensis became extinct….   [tags: Anthropology Essays Paleontology Papers]


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    Extinction of Dinosaurs due to Asteroid Impact

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    Saving the Cheetahs of the Serengeti from Extinction

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    Earth Faces a Sixth Mass Extinction

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    The Current Extinction Rate Throughout the World: We Must Act Now

    – Human beings are heavily reliant on nature’s biodiversity. This biodiversity, however, is threatened by accelerating extinction rates which are approaching past mass extinction levels. Human activities are largely responsible for this trend, and, while there has been some success in preserving select species, the scale of the impending extinction will necessitate the conservation of existing ecosystems if biodiversity is to be preserved. Fortunately, the relative geographical concentration of most biodiversity makes such efforts both possible and economically feasible….   [tags: Environment]


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    Did humans cause the mass extinction of megafauna during the Late Pleistocene period?

    – Importance of question for archeological research: Introduction It’s hard to say that humans haven’t had an impact on their environment. Climate change, for example, has been a hot issue in the developed world ever since evidence proving the existence of human-caused global warming was unleashed leading to an onslaught of theories regarding its potential effect on our future. But what impact did humans have thousands of years ago when they were first colonizing North America. The question of what caused the extinction of megafauna during the Late Pleistocene period is one that archaeologists have struggled to answer for decades, but why should it matter….   [tags: Environment]


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    The Permo-Triassic Mass-extinction and the Earth´s Triassic Period

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    The Grey Wolf’s, Canis Lupus : Help Stop the Extinction

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    The Extinction Event and Life in the Post-Apocalyptic Greenhouse

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    An Open Letter to Roderick Nash on Island Civilization

    – … Nash is constantly blaming humans for the destruction of nature and Earth’s wounds, maybe it’s true, but Nash under estimates Earth’s self healing abilities. Humans can not be the only thing that is hurting the Earth. When you really think about it, Earth goes through a lot of natural disasters, which cannot be controlled. According to an activist, Tim Haering, “Tsunamis, floods, volcanoes, earthquakes, tornadoes, wildfires, disease nature kills more than we kill each other.” Earth throws in all of these natural disasters to destroy what is hurting it….   [tags: pollution, extinction, nature, disasters]


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    What Role Does the Amazon Rainforest Play in the World?

    – People have been trying to find out what role does the Amazon rainforest plays.Also there are many shifts of climate in the Amazon rainforest. Each year 28 million acres of land is burned,and cutted down causing deforestation. Killing many living species in that process.If this continues,then very many plants,and animals are going instinct in areas. The oil productions can hurt the rainforest.It says” in 2003 an oil pipline that runs through the amazon rainforest in Ecuador.”So we can see that there was a pipline going through the rainforest.That oil pipline was causeing irreparable damage to the Amazon rain forest….   [tags: deforestation, hunting, extinction]


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    Cloning Endangered Species only Delays Extinction

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    Poachers Kill Magnificent Animals for Profit

    – … These high prices that people are willing to pay creates a large incentive for poachers. A complete species extinction is one of the worst effects that could come from poaching because it wouldn’t just eliminate a species, but it would also negatively affect the environment and the creatures that live there. If a predator species is hunted until extinction, it could create a massive chain of devastation. Predators are close to the top of the food chain and keep the population of some prey under control….   [tags: hunting, extinction, food supply]


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    Animals Should Be Kept in National Parks

    – Would you like to see animals behind bars or have a great communication with them face to face. People now set up national parks in order to protect edge species, which are facing extinction made by human development. In the other hands, people set up zoos for animal study but more for entertainment. Because of several reasons, animals should be kept in national parks instead of zoos for the sake of animal protection. There are some facts about them to help understanding and comparing their work and function….   [tags: animals, extinction, zoo]


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    Ways to Help Endangered Species

    – There are many endangered species out in the world and there’s many ways there being affected. But there’s many ways we can help these animals and plants. There’s no reason we cannot fix what we started. If we don’t we will lose our beautiful environment. There is nothing normal about today’s rate of extinction. Booming human population growth over the last two century’s has put and continues to put many life forms in danger. The problem is no one knows how extinction of organisms will affect the other members of its ecosystem but the removal of a single species can set off a chain reaction affecting others….   [tags: Extinction Rate, Environment, Wildlife]


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    Overfishing: A Threat to Ecosystems

    – In 2013, a single 489-pound bluefin tuna sold for $1.76 million at the Tsukiji fish market in Japan. It was the first bluefin sold of the year and beat the previous record by nearly $1 million making it the most expensive fish ever sold (WWF). This specific fish makes for some delicious sushi and sashimi, with the average cost per fish being up to $100,000 (Animal Planet). Fishermen are driven by such high prices and use any means possible to catch the bluefin tuna, along with other highly profitable fish….   [tags: Extinction, Regulations, Nature]


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    Ways to Help Endangered Species

    – Have you ever thought about a certain species becoming endangered. Have you ever thought about helping out with this particular problem. Scientists are actually trying to make new laws to explain what is legal and illegal to hunt. Others can help out, too, by cleaning up any nearby scraps and litter that is harmful to many organisms. We need to use our resources very carefully and wisely. The fact that there are many species becoming endangered, we need to fight to keep another species alive….   [tags: extinction, poaching, animals]


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    The Decrease in Puma Population

    – The decrease in Puma population causes great changes in our ecosystems. Pumas are close to extinct in South Carolina. There are only a few if the come here from the west which “holds most of the puma population in North America” (Panthera). There are many causes that band together to cause their extinction in South Carolina. This can affect our community by hurting our ecosystems. An ecosystem will go out of balance if a major predator is taken out of it, such as the puma. The decrease in puma population can greatly harm our communities….   [tags: cougars, puma extinction, ecosystem]


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    Overview of Endangered Species

    – Endangered species are rare or threatened plants or animals that are rapidly vanishing and becoming extinct. This means they are plants and animals that now exist in only small numbers and soon may be gone forever unless whatever is causing this to occur changes. Maybe as humans, we need to cherish these plants and animals as much as we cherish our material possessions, as after all these may be the most valuable treasures for all of mankind. According to the International Union for the Conservation of Nature (“IUCN”) there are 6 categories of endangered animals: • Extinct meaning no living member of a particular species on earth….   [tags: threatened plants, animals, extinction]


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    Zoos Thoughout the World

    – Families strolling, children squealing with glee, and adults gazing with interest; A typical day at the zoo. Animal-lovers rush throughout zoos in search of their favorite feline or lizard, while children smack on popcorn as they tap on glass enclosures. For hundreds of years people have gone to zoos in seek of entertainment. The zoo provides a fun and educational time for families, but the joy of seeing adorable creatures blinds spectators from seeing the pain zoo animals live with. People do not realize the harm zoos do to animals….   [tags: animals, entertainment, conservation, extinction]


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    1090 words | (3.1 pages)
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    Case study: Language Competition

    – … The agent could be in either of the two states: X, using language X; or Y, using language Y. The evolution of the agent state is described as follows: starting with an initial situation, at each step one agent i is chosen randomly and the local densities, σi,l (l=X, Y), is computed for each of the language states in i’s neighbourhood. The probabilities of an agent switching its state is according to the following formula. pi,X→Y =(1−S)(σi,Y)a , pi,Y→X =S(σi,X)a where S is the prestige of the language X, 0 ≤ S ≤ 1; and a is the volatility, a ≥ 0….   [tags: communication, survival, extinction]


    Term Papers

    1471 words | (4.2 pages)
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    Loss of Biodiversity

    – Nowadays it is common to read articles in newspapers and magazines regarding biodiversity issues. Human beings have been knowingly and unknowingly destroying biodiversity since their existence. Biodiversity is the measure of the variety of species of animals living in an area. Forests are usually areas with high biodiversity while deserts are the opposite. Human beings have always destroyed biodiversity either by deforestation, or by some other means. Biodiversity depletion is a natural phenomenon….   [tags: species, habitat, extinction]


    Better Essays

    998 words | (2.9 pages)
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    The California Condor

    – … californianus also have a very poor sense of smell, which assists them in consuming their meals. When they find a meal, the condors will often gorge themselves to the point where they will have to spend several hours resting before taking flight again. Since the condor has now sweat glands they employ a unique technique in attempting to cool themselves down when they become to hot. They will defecate on their legs. “Though this might sound gross or strange to us, this is actually a very effective way for them to stay comfortable when temperatures get too high….   [tags: birds, captivity, endangered, extinction]


    Term Papers

    1274 words | (3.6 pages)
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    The Future of Man: Bright or Bleak?

    – For almost all of recorded history, man has been fascinated with his future and all of both the wonders and horrors it might hold. From the Aztecs, who created a calendar that dated all the way to a couple of years prior to today, to the famed Nostradamus who was allegedly clairvoyant and whose prophecies have been interpreted to fit modern happenings, to modern-day apocalypse writers, man is held captivated by that which he cannot know for certain: the future. Many literary artists have published works on their idea of the future of both the human race and our planet, with very few of them having much of a positive outlook….   [tags: man extinction, human’s future, dystopia]


    Powerful Essays

    1458 words | (4.2 pages)
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