Animal Extinction Essay Example for Free

Animal Extinction Essay Animal Extinction the greatest threat to mankind In the final stages of dehydration the body shrinks, robbing youth from the young as the skin puckers, eyes recede into orbits, and the tongue swells and cracks. Brain cells shrivel and muscles seize. The kidneys shut down. Blood volume drops, triggering hypovolemic shock, with its attendant respiratory and cardiac failures. These combined assaults disrupt the chemical and electrical pathways of the body until all systems cascade toward death. Such is also the path of a dying species. Beyond a critical point, the collective body of a unique kind of mammal or bird or amphibian or tree cannot be salvaged, no matter the first aid rendered. Too few individuals spread too far apart, or too genetically weakened, are susceptible to even small natural disasters: a passing thunderstorm; an unexpected freeze; drought. At fewer than 50 members, populations experience increasingly random fluctuations until a kind of fatal arrhythmia takes hold. Eventually, an entire genetic legacy, born in the beginnings of life on earth, is removed from the future. Scientists recognise that species continually disappear at a background extinction rate estimated at about one species per million per year, with new species replacing the lost in a sustainable fashion. Occasional mass extinctions convulse this orderly norm, followed by excruciatingly slow recoveries as new species emerge from the remaining gene-pool, until the world is once again repopulated by a different catalogue of flora and fauna. From what we understand so far, five great extinction events have reshaped earth in cataclysmic ways in the past 439 million years, each one wiping out between 50 and 95 per cent of the life of the day, including the dominant life forms; the most recent event killing off the non-avian dinosaurs. Speciations followed, but an analysis published in Nature showed that it takes 10 million years before biological diversity even begins to approach what existed before a die-off. Today were living through the sixth great extinction, sometimes known as the Holocene extinction event. We carried its seeds with us 50,000 years ago as we migrated beyond Africa with Stone Age blades, darts, and harpoons, entering pristine Ice Age ecosystems and changing them forever by wiping out at least some of the unique megafauna of the times, including, perhaps, the sabre-toothed cats and woolly mammoths. When the ice retreated, we terminated the long and biologically rich epoch sometimes called the Edenic period with assaults from our newest weapons: hoes, scythes, cattle, goats, and pigs. But, as harmful as our forebears may have been, nothing compares to whats under way today. Throughout the 20th century the causes of extinction habitat degradation, overexploitation, agricultural monocultures, human-borne invasive species, human-induced climate-change increased exponentially, until now in the 21st century the rate is nothing short of explosive. The World Conservation Unions Red List a database measuring the global status of Earths 1. million scientifically named species tells a haunting tale of unchecked, unaddressed, and accelerating biocide. When we hear of extinction, most of us think of the plight of the rhino, tiger, panda or blue whale. But these sad sagas are only small pieces of the extinction puzzle. The overall numbers are terrifying. Of the 40,168 species that the 10,000 scientists in the World Conservation Union have assessed, one in four mammals, one in eight birds, one in three amphibians, one in three conifers and other gymnosperms are at risk of e xtinction. The peril faced by other classes of organisms is less thoroughly analysed, but fully 40 per cent of the examined species of planet earth are in danger, including perhaps 51 per cent of reptiles, 52 per cent of insects, and 73 per cent of flowering plants. By the most conservative measure based on the last centurys recorded extinctions the current rate of extinction is 100 times the background rate. But the eminent Harvard biologist Edward O Wilson, and other scientists, estimate that the true rate is more like 1,000 to 10,000 times the background rate. The actual annual sum is only an educated guess, because no scientist believes that the tally of life ends at the 1. 5 million species already discovered; estimates range as high as 100 million species on earth, with 10 million as the median guess. Bracketed between best- and worst-case scenarios, then, somewhere between 2. 7 and 270 species are erased from existence every day. Including today. We now understand that the majority of life on Earth has never been and will never be known to us. In a staggering forecast, Wilson predicts that our present course will lead to the extinction of half of all plant and animal species by 2100. You probably had no idea. Few do. A poll by the American Museum of Natural History finds that seven in 10 biologists believe that mass extinction poses a colossal threat to human existence, a more serious environmental problem than even its contributor, global warming; and that the dangers of mass extinction are woefully underestimated by almost everyone outside science. In the 200 years since French naturalist Georges Cuvier first floated the concept of extinction, after examining fossil bones and concluding the existence of a world previous to ours, destroyed by some sort of catastrophe, we have only slowly recognised and attempted to correct our own catastrophic behaviour. Some nations move more slowly than others. In 1992, an international summit produced a treaty called the Convention on Biological Diversity that was subsequently ratified by 190 nations all except the unlikely coalition of the United States, Iraq, the Vatican, Somalia, Andorra and Brunei. The European Union later called on the world to arrest the decline of species and ecosystems by 2010. Last year, worried biodiversity experts called for the establishment of a scientific body akin to the Intergovernmental Panel on Climate Change to provide a united voice on the extinction crisis and urge governments to action. Yet, despite these efforts, the Red List, updated every two years, continues to show metastatic growth. There are a few heartening examples of so-called Lazarus species lost and then found: the wollemi pine and the mahogany lider in Australia, the Jerdons courser in India, the takahe in New Zealand, and, maybe, the ivory-billed woodpecker in the United States. But for virtually all others, the Red List is a dry country with little hope of rain, as species ratchet down the listings from secure to vulnerable, to endangered, to critically endangered, to extinct. All these disappearing species are part of a fragile membrane of organisms wrapped around the Earth so thinly, writes Wilson, that it cannot be seen edgewise from a space shuttle, yet so internally complex that most species composing it remain undiscovered. We owe everything to this membrane of life. Literally everything. The air we breathe. The food we eat. The materials of our homes, clothes, books, computers, medicines. Goods and services that we cant even imagine well someday need will come from species we have yet to identify. The proverbial cure for cancer. The genetic fountain of youth. Immortality. Mortality. The living membrane we so recklessly destroy is existence itself. Biodiversity is defined as the sum of an areas genes (the building blocks of inheritance), species (organisms that can interbreed), and ecosystems (amalgamations of species in their geological and chemical landscapes). The richer an areas biodiversity, the tougher its immune system, since biodiversity includes not only the number of species but also the number of individuals within that species, and all the inherent genetic variations lifes only army against the diseases of oblivion. Yet its a mistake to think that critical genetic pools exist only in the gaudy show of the coral reefs, or the cacophony of the rainforest. Although a hallmark of the desert is the sparseness of its garden, the orderly progression of plants and the understated camouflage of its animals, this is only an illusion. Turn the desert inside out and upside down and youll discover its true nature. Escaping drought and heat, life goes underground in a tangled overexuberance of roots and burrows reminiscent of a rainforest canopy, competing for moisture, not light. Animal trails criss-cross this subterranean realm in private burrows engineered, inhabited, stolen, shared and fought over by ants, beetles, wasps, cicadas, tarantulas, spiders, lizards, snakes, mice, squirrels, rats, foxes, tortoises, badgers and coyotes. To survive the heat and drought, desert life pioneers ingenious solutions. Coyotes dig and maintain wells in arroyos, probing deep for water. White-winged doves use their bodies as canteens, drinking enough when the opportunity arises to increase their bodyweight by more than 15 per cent. Black-tailed jack rabbits tolerate internal temperatures of 111F. Western box turtles store water in their oversized bladders and urinate on themselves to stay cool. Mesquite grows taproots more than 160ft deep in search of moisture. These life-forms and their life strategies compose what we might think of as the body of the desert, with some species the lungs and others the liver, the blood, the skin. The trend in scientific investigation in recent decades has been toward understanding the interconnectedness of the bodily components, i. e. the effect one species has on the others. The loss of even one species irrevocably changes the desert (or the tundra, rainforest, prairie, coastal estuary, coral reef, and so on) as we know it, just as the loss of each human being changes his or her family forever. Nowhere is this better proven than in a 12-year study conducted in the Chihuahuan desert by James H Brown and Edward Heske of the University of New Mexico. When a kangaroo-rat guild composed of three closely related species was removed, shrublands quickly converted to grasslands, which supported fewer annual plants, which in turn supported fewer birds. Even humble players mediate stability. So when you and I hear of this years extinction of the Yangtze river dolphin, and think, how sad, were not calculating the deepest cost: that extinctions lead to co-extinctions because most living things on Earth support a few symbionts, while keystone species influence and support myriad plants and animals. Army ants, for example, are known to support 100 known species, from beetles to birds. One of the most alarming developments is the rapid decline not just of species but of higher taxa, such as the class Amphibia, the 00-million-year-old group of frogs, salamanders, newts and toads hardy enough to have preceded and then outlived most dinosaurs. Biologists first noticed die-offs two decades ago, and, since then, have watched as seemingly robust amphibian species vanished in as little as six months. The causes cover the spectrum of human environmental assaults, including rising ultraviolet radiation from a thinning ozone layer, increases in po llutants and pesticides, habitat loss from agriculture and urbanisation, invasions of exotic species, the wildlife trade, light pollution, and fungal diseases. Sometimes stressors merge to form an unwholesome synergy; an African frog brought to the West in the 1950s for use in human pregnancy tests likely introduced a fungus deadly to native frogs. Meanwhile, a recent analysis in Nature estimated that, in the past 20 years, at least 70 species of South American frogs had gone extinct as a result of climate change. In a 2004 analysis published in Science, Lian Pin Koh and his colleagues predict that an initially modest co-extinction rate will climb alarmingly as host extinctions rise in the near future. Graphed out, the forecast mirrors the rising curve of an infectious disease, with the human species acting all the parts: the pathogen, the vector, the Typhoid Mary who refuses culpability, and, ultimately, one of up to 100 million victims. Rewilding is bigger, broader, and bolder than humans have thought before. Many conservation biologists believe its our best hope for arresting the sixth great extinction. Wilson calls it mainstream conservation writ large for future generations. This is because more of what weve done until now protecting pretty landscapes, attempts at sustainable development, community-based conservation and ecosystem management will not preserve biodiversity through the critical next century. By then, half of all species will be lost, by Wilsons calculation. To save Earths living membrane, we must put its shattered pieces back together. Only megapreserves modelled on a deep scientific understanding of continent-wide ecosystem needs hold that promise. What I have been preparing to say is this, wrote Thoreau more than 150 years ago. In wildness is the preservation of the world. This, science finally understands. The Wildlands Project, the conservation group spearheading the drive to rewild North America by reconnecting remaining wildernesses (parks, refuges, national forests, and local land trust holdings) through corridors calls for reconnecting wild North America in four broad megalinkages: along the Rocky Mountain spine of the contine nt from Alaska to Mexico; across the arctic/boreal from Alaska to Labrador; along the Atlantic via the Appalachians; and along the Pacific via the Sierra Nevada into the Baja peninsula. Within each megalinkage, core protected areas would be connected by mosaics of public and private lands providing safe passage for wildlife to travel freely. Broad, vegetated overpasses would link wilderness areas split by roads. Private landowners would be enticed to either donate land or adopt policies of good stewardship along critical pathways. Its a radical vision, one the Wildlands Project expects will take 100 years or more to complete, and one that has won the project a special enmity from those who view environmentalists with suspicion. Yet the core brainchild of the Wildlands Project that true conservation must happen on an ecosystem-wide scale is now widely accepted. Many conservation organisations are already collaborating on the project, including international players such as Naturalia in Mexico, US national heavyweights like Defenders of Wildlife, and regional experts from the Southern Rockies Ecosystem Project to the Grand Canyon Wildlands Council. Kim Vacariu, the South-west director of the USs Wildlands Project, reports that ranchers are coming round, one town meeting at a time, and that there is interest, if not yet support, from the insurance industry and others who face the reality of car-wildlife collisions daily. At its heart, rewilding is based on living with the monster under the bed, since the big, scary animals that frightened us in childhood, and still do, are the fierce guardians of biodiversity. Without wolves, wolverines, grizzlies, black bears, mountain lions and jaguars, wild populations shift toward the herbivores, who proceed to eat plants into extinction, taking birds, bees, reptiles, amphibians and rodents with them. A tenet of ecology states that the world is green because carnivores eat herbivores. Yet the big carnivores continue to die out because we fear and hunt them and because they need more room than we preserve and connect. Male wolverines, for instance, can possess home ranges of 600 sq m. Translated, Greater London would have room for only one. The first campaign out of the Wildlands Projects starting gate is the spine of the continent, along the mountains from Alaska to Mexico, today fractured by roads, logging, oil and gas development, grazing, ski resorts, motorised back-country recreation and sprawl. The spine already contains dozens of core wildlands, including wilderness areas, national parks, national monuments, wildlife refuges, and private holdings. On the map, these scattered fragments look like debris falls from meteorite strikes. Some are already partially buffered by surrounding protected areas such as national forests. But all need interconnecting linkages across public and private lands farms, ranches, suburbia to facilitate the travels of big carnivores and the net of biodiversity that they tow behind them. The Wildlands Project has also identified the five most critically endangered wildlife linkages along the spine, each associated with a keystone species. Grizzlies already pinched at Crowsnest Pass on Highway Three, between Alberta and British Columbia, will be entirely cut off from the bigger gene pool to the north if a larger road is built. Greater sage grouse, Canada lynx, black bears and jaguars face their own lethal obstacles further south. But by far the most endangered wildlife-linkage is the borderland between the US and Mexico. The Sky Islands straddle this boundary, and some of North Americas most threatened wildlife jaguars, bison, Sonoran pronghorn, Mexican wolves cross, or need to cross, here in the course of their lifes travels. Unfortunately for wildlife, Mexican workers cross here too. Men, women, and children, running at night, one-gallon water jugs in hand. The problem for wildlife is not so much the intrusions of illegal Mexican workers but the 700-mile border fence proposed to keep them out. From an ecological perspective, it will sever the spine at the lumbar, paralysing the lower continent. Here, in a nutshell, is all thats wrong with our treatment of nature. Amid all the moral, practical, and legal issues with the border fence, the biological catastrophe has barely been noted. Its as if extinction is not contagious and we wont catch it. If, as some indigenous people believe, the jaguar was sent to the world to test the will and integrity of human beings, then surely we need to reassess. Border fences have terrible consequences. One between India and Pakistan forces starving bears and leopards, which can no longer traverse their feeding territories, to attack villagers. The truth is that wilderness is more dangerous to us caged than free and has far more value to us wild than consumed. Wilson suggests the time has come to rename the environmentalist view the real-world view, and to replace the gross national product with the more comprehensive genuine progress indicator, which estimates the true environmental costs of farming, fishing, grazing, mining, smelting, driving, flying, building, paving, computing, medicating and so on. Until then, its like keeping a ledger recording income but not expenses. Like us, the Earth has a finite budget.

Holocaust 6 Essay -- essays research papers

The Holocaust   Ã‚  Ã‚  Ã‚  Ã‚  Throughout history the Jewish people have been scapegoats; whenever something was not going right they were the ones to blame. From Biblical times through to the Shakespearean Era, all the way to the Middle East Crisis and the creation of Israel, the Jews have been persecuted and blamed for the problems of the world. The most horrifying account of Jewish persecution is the holocaust, which took place in Europe from 1933 to 1945 when Adolf Hitler tried to eliminate all the people that he thought were inferior to the Germans, namely the Jews, because he wanted a pure Aryan State.   Ã‚  Ã‚  Ã‚  Ã‚  In January of 1933, Adolf Hitler, who was part of the Right Wing National Socialist German Workers Party or Nazis, became Chancellor of Germany. Chancellor was the highest and most powerful position in all of Germany, and this gave Hitler the control of everything and everyone in Germany, after that nothing would ever be the same. Hitler wanted a pure Aryan State, a country that had a superior race to the rest of the world. This meant that he would have to kill all of the people who stood in the way of his purification. This was called a cleansing of Germany. Hitler had most of the Jews, Romani (Gypsies), Poles, Slavs, homosexuals, the anti-social, communists, socialists, trade unionists, Jehovah Witnesses, and the mentally and physically handicapped people whom were holding back the advancement of the Aryan’s executed, this was called â€Å"Aryanization†.   Ã‚  Ã‚  Ã‚  Ã‚  Knowing who was and who was not a Jew was one of the problems that faced the Germans at beginning of the Holocaust. You were considered a Jew if you had three or four Jewish grandparents who were Jews, even if you weren’t a part of the Jewish community. You were known as a Mishlinge or half-breed if you had one Jewish grandparent, and you were considered a half-Jew if you were part of the Jewish community or married to a Jew. All these people were known collectively as â€Å"non-Aryans.†   Ã‚  Ã‚  Ã‚  Ã‚  People often wonder why no one put a stop to the elimination of the Jewish people; but most people did not know what happened in Germany and the rest of Europe until the end of the war. If they did know about it they chose not to believe that it existed and thought that it was only a bunch of lies. Aryan’s knew that if the... ...d because he did not like a group of people he felt that he was superior to them. It is also scary to think that so many people believed that he was right and that they truly could get rid of all the Jews and non-Aryans. In my opinion it is disgusting that people could actually have thoughts like that, it just proves that he are not as great as we think we are and maybe we are not the smartest and most intelligent creature on the earth. We have to stop blaming others for something that we are not or for something that we did, it’s just not right. During the Holocaust six million Jews died whether from the extermination camps, malnutrition, disease, being executed or by medical experimentation. In 1933, before WW II there were approximately nine million Jews living in twenty-one European countries, which Germany would soon occupy. At the end of WW II six million Jews had died. A jolting sixty six percent of all Jews died that means two out of every three Jews died because of Adolf Hitler and his followers. Jews were not the only ones to be persecuted hundreds of Gypsies, Poles, Slavs and other ethnic groups, along with homosexuals and other â€Å"insuperior† races were also persecuted.

Booker T. Washington and W. E. B. Du Bois

No two persons have had a greater impact on the black person's right movement in the late nineteenth and early twentieth cenury American history more than W. E. Burghardt Du Bois and Booker T. Washington. Both have gained millions of followers in their quest to elevate the black people's place in society with their show of great intelligence and wisdom. Yet, their philosophies and ideas on how that goal can be achieved were as different as the racial differences that separated the whites and the blacks in their time.According to Ellis Washington, author of The Devil Is In the Details: Essays on Law, Race, politics, and Religion, â€Å"If the philosophy of Du Bois and Washington can be reduced to one word it would be rights vs. duty† (Washington, â€Å"Du Bois vs. Washington†, para. 21). Indeed, while Du Bois was a very vocal advocate on the black man's right to an equal treatment as the white man without reservation or apology, Washington espouses more on the idea of ra cial accomodation and gradual acceptance between the two races.This was nowhere more evident than in their respective speeches, â€Å"The Talented Tenth† and â€Å"The Atlanta Compromise†. In â€Å"The Talented Tenth†, Du Bois asserts that only through the cooperation of the best and the brightest of the black people can the general masses be elevated to the standards that they deserve. He argues that for this to happen, black people needed to also be accorded the elite educational training that is given to the white people, saying that â€Å"The Negro race, like all races, is going to be saved by its exceptional men† (Du Bois).Washington, on the other hand, appeals to the white Americans in a way that was almost pleading and submissive. In his speech at Atlanta in what came to be known as the â€Å"Atlanta Compromise†, he said: Casting down your bucket among my people, helping and encouraging them as you are doing on these grounds, and to educatio n of head, hand, and heart, you will find that they will buy your surplus land, make blossom the waste places in your fields, and run your factories.While doing this, you can be sure in the future, as in the past, that you and your families will be surrounded by the most patient, faithful, law-abiding, and unresentful people the the world has seen (Harlan, 583-587). Such a difference in ideologies, of course, is bound to elicit a reaction from one or both of the leaders, and indeed, Du Bois was the most influential critic of Washington, saying that Washington had encountered the most criticism from his own people, amounting to bitterness, even though generally held in silence (Du Bois, â€Å"Of Mr.Booker T. Washington and Others†). The contest between the two ideologies has long been debated, but the Du Boisian perspective have gained the upper hand, mainly due to the followers of it's leadership paradigm making major contributions to Black communitarian advancement during th e era between the two World Wars, resulting in the eventual demise of Washington's leadership legacy (Kilson, â€Å"Booker T. vs DuBois†). There is no question, though, that whichever became more influential, both will always be a defining force in Black American history.Works Cited Du Bois, W. E. Burghardt. â€Å"Of Mr. Booker T. Washington and Others. † The Souls of Black Folk: Essays and Sketches. Cambridge: University Press John Wilson and Son, Cambridge, USA, 1903. —. â€Å"The Talented Tenth†. The Negro Problem: A Series of Articles by Representative Negroes of To-day. New York: 1903. Harlan, Louis R. , ed. The Booker T. Washington Papers, Vol. 3. Urbana: University of Illinois Press, 1974. 583-587. Kilson, Martin.â€Å"Booker T. vs DuBois: Retrospective on the Washington/DuBoisian Black Leadership Paradigms: Part II. † The Black Commentator: Think Piece. 2 March 2006. 19 December 2007 Washington, Ellis. â€Å"Du Bois vs. Washington: Old Le ssons Black People Have Not Learned. † Issues & Views. 2001. 19 December 2007

Analysis of the Connection of Religion and Terrorism Free Essay Example, 1750 words

Since the September 11 attack in 2001, things were never the same again between Christians and Muslims. The tension between the two religions never came to subside, instead, it continues to intensify, as the Christians incessantly hold the Muslims responsible for bombings, kidnappings, and other acts of terrorism. changed America forever (1). The combat between Muslims and Christians is more than just cultural differences. Such hostilities were brought about and heightened by such belief that terror campaigns are carried out by the advocates of Islam. Haar, Gerrie et al. stated, In most cases, people have been concentrating on religious fundamentalism and, after the events of 9/11 , on religious terrorism: terror carried out in the name of God. The transnational character of these phenomena, typical of the present era, affects all parts of the globe, in the Western and non-Western world alike (3). Countless media coverage has deepened the conflict, although it was revealed that issues are somehow being overstated. com has published, The terrorist threat posed by radicalized Muslim- Americans have been exaggerated, according to a study released Wednesday by researchers at Duke University and the University of North Carolina at Chapel Hill. We will write a custom essay sample on Analysis of the Connection of Religion and Terrorism or any topic specifically for you Only $17.96 $11.86/page Mason, Barry et. al wrote, Violent religious clashes broke out in the city of Kaduna in northern Nigeria on February 21 and have continued throughout the week. Kaduna is the second largest city in the north. The clashes followed a march by tens of thousands of Christians to protest the proposal to introduce Muslim sharia law as the criminal code throughout Kaduna state.