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Holocene extinction Wikipedia. The Holocene extinction, otherwise referred to as the Sixth extinction or Anthropocene extinction, is the ongoing extinction event of species during the present Holoceneepoch, mainly due to human activity. The large number of extinctions spans numerous families of plants and animals, including mammals, birds, amphibians, reptiles and arthropods. With widespread degradation of highly biodiverse habitats such as coral reefs and rainforest, as well as other areas, the vast majority of these extinctions is thought to be undocumented. The current rate of extinction of species is estimated at 1. The Holocene extinction includes the disappearance of large land animals known as megafauna, starting at the end of the last Ice Age. Drivers Gerber Infinity 450' title='Drivers Gerber Infinity 450' />Megafauna outside of the African continent, which did not evolve alongside humans, proved highly sensitive to the introduction of new predation, and many died out shortly after early humans began spreading and hunting across the Earth additionally, many African species have also gone extinct in the Holocene. These extinctions, occurring near the PleistoceneHolocene boundary, are sometimes referred to as the Quaternary extinction event. The arrival of humans on different continents coincides with megafaunal extinction. Templates De Curriculum Vitae Gratis. The most popular theory is that human overhunting of species added to existing stress conditions. Although there is debate regarding how much human predation affected their decline, certain population declines have been directly correlated with human activity, such as the extinction events of New Zealand and Hawaii. Aside from humans, climate change may have been a driving factor in the megafaunal extinctions, especially at the end of the Pleistocene. The ecology of humanity has been noted as being that of an unprecedented global superpredator that regularly preys on the adults of other apex predators and has worldwide effects on food webs. Extinctions of species have occurred on every land mass and ocean, with many famous examples within Africa, Asia, Europe, Australia, North and South America, and on smaller islands. Overall, the Holocene extinction can be characterized by the human impact on the environment. The Holocene extinction continues into the 2. Human overpopulation and continued population growth along with profligate consumption are considered to be the primary drivers of this rapid decline. DefinitionseditThe Holocene extinction is also known as the sixth extinction, due to its possibly being the sixth mass extinct event, after the OrdovicianSilurian extinction events, the Late Devonian extinction, the PermianTriassic extinction event, the TriassicJurassic extinction event, and the CretaceousPaleogene extinction event. There is no general agreement on where the Holocene, or anthropogenic, extinction begins, and the Quaternary extinction event, which includes climate change resulting in the end of the last ice age, ends, or if they should be considered separate events at all. Some have suggested that anthropogenic extinctions may have begun as early as when the first modern humans spread out of Africa between 1. Australia, New Zealand and Madagascar,4 in a similar way that any large, adaptable predator moving into a new ecosystem would. In many cases, it is suggested even minimal hunting pressure was enough to wipe out large fauna, particularly on geographically isolated islands. Only during the most recent parts of the extinction have plants also suffered large losses. In The Future of Life 2. E. O. Wilson of Harvard calculated that, if the current rate of human disruption of the biosphere continues, one half of Earths higher lifeforms will be extinct by 2. A 1. 99. 8 poll conducted by the American Museum of Natural History found that seventy percent of biologists acknowledge the existence of the anthropogenic extinction. Numerous scientific studies such as a 2. The Holocene extinction, otherwise referred to as the Sixth extinction or Anthropocene extinction, is the ongoing extinction event of species during the present. Torrentz will always love you. Farewell. 20032016 Torrentz. Nature,1. 4 and papers authored by the IUCNs annual Red List of threatened species have since reinforced this conviction. At present, the rate of extinction of species is estimated at 1. Earth. One scientist estimates the current extinction rate may be 1. Nevertheless, most scientists predict a much lower extinction rate than this outlying estimate. Stuart Pimm stated the current rate of species extinction is about 1. Mass extinctions are characterized by the loss of at least 7. In a pair of studies published in 2. Hawaiian snails led to the conclusion that 7 of all species on Earth may have been lost already. While there is widespread consensus in the scientific community that human activity is accelerating the extinction of many animal species through the destruction of wild lands, the consumption of animals as resources or luxuries, and the persecution of species that humans view as threats or competitors,2. Stuart Pimm, for example, asserts that the sixth mass extinction is something that hasnt happened yet we are on the edge of it. In November 2. 01. AnthropoceneeditThe abundance of species extinctions considered anthropogenic, or due to human activity, have sometimes especially when referring to hypothesized future events been collectively called the Anthropocene extinction. Anthropocene is a term introduced in 2. It is now posited by some that a new geological epoch has begun, characterised by the most abrupt and widespread extinction of species since the CretaceousPaleogene extinction event 6. The term anthropocene is being used more frequently by scientists, and some commentators may refer to the current and projected future extinctions as part of a longer Holocene extinction. Type or paste a DOI name into the text box. Click Go. Your browser will take you to a Web page URL associated with that DOI name. Send questions or comments to doi. Kilauea Mount Etna Mount Yasur Mount Nyiragongo and Nyamuragira Piton de la Fournaise Erta Ale. Target Cartwheel, a whole new spin on coupons. Find share the best deals in all your favorite categories grocery, baby, apparel, health beauty more. The HoloceneAnthropocene boundary is contested, with some commentators asserting significant human influence on climate for much of what is normally regarded as the Holocene. Epoch. 3. 1 Other commentators place the HoloceneAnthropocene boundary at the industrial revolution while also saying that, formal adoption of this term in the near future will largely depend on its utility, particularly to earth scientists working on late Holocene successions. It has been suggested that human activity has made the period following the mid 2. Holocene to consider it a new geological epoch, known as the Anthropocene,3. Earths history by the International Commission on Stratigraphy in 2. In order to constitute the Holocene as an extinction event, scientists must determine exactly when anthropogenic greenhouse gas emissions began to measurably alter natural atmospheric levels at a global scale and when these alterations caused changes to global climate. Employing chemical proxies from Antarctic ice cores, researchers have estimated the fluctuations of carbon dioxide CO2 and methane gases CH4 in the earths atmosphere for the late Pleistocene and Holocene epochs. Based on studies that estimated fluctuations of carbon dioxide and methane in the atmosphere using chemical proxies from Antarctic ice cores, general argumentation of when the peak of the Anthropocene occurred pertains to the timeframe within the previous two centuries typically beginning with the Industrial Revolution, when greenhouse gas levels were recorded by contemporary methods at its highest. InfluenceseditCompetition by humanseditThe percent of megafauna on different land masses over time, with the arrival of humans indicated. The Holocene extinction is mainly caused by human activity. Outlook Wedding Invitation Templates on this page.