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Topic: Extinction (disambiguation)

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	Extinction - Wikipedia, the free encyclopedia
		The moment of extinction is generally considered to be the death of the last individual of that species (although the capacity to breed and recover may have been lost before this point; see population bottleneck).
		Extinction of a species may come suddenly when an otherwise healthy species is wiped out completely, as when toxic pollution renders its entire habitat unlivable; or may occur gradually over thousands or millions of years, such as when a species gradually loses out competition for food to newer, better adapted competitors.
		Extinction is an important research topic in the field of zoology, and biology in general, and has also become an area of concern outside the scientific community.
	en.wikipedia.org /wiki/Extinction (3224 words)

	Extinction - Biocrawler (Site not responding. Last check: 2007-11-04)
		In biology and ecology, extinction is the ceasing of existence of a species or group of taxons.
		Mass extinctions are a key part of the punctuated equilibrium hypothesis of Stephen Jay Gould and Niles Eldredge.
		Although scientists are generally opposed to future extinctions they have found historic extinctions very useful for research; in the early nineteenth century Georges Cuvier's observations of fossil bones convinced him that they did not originate in extant animals.
	www.biocrawler.com /encyclopedia/Extinction (2327 words)

	extinction (biology) - Hutchinson encyclopedia article about extinction (biology) (Site not responding. Last check: 2007-11-04)
		Extinctions occur when a species becomes unfit for survival in its natural habitat usually to be replaced by another, better-suited species.
		The greatest mass extinction occurred about 250 million years ago, marking the Permian–Triassic boundary (see geological time), when up to 96% of all living species became extinct.
		The extinction of the flightless bird of the island of Mauritius, the dodo, was due to it being killed for food.
	encyclopedia.farlex.com /extinction+(biology) (495 words)

	Extinction - Facts, Information, and Encyclopedia Reference article
		Because humans are a reasonably intelligent species capable of abstract thought, the views on the extinction of species other than Homo sapiens tend to be diverse, ranging from the preservative views of the most vehement eco-warrior to general apathy in the matter.
		However, it is seen that humans as a whole generally will act to protect against the extinction of species (primarily species that have a direct impact on human agriculture, such as cattle), if only to further preserve and perpetuate the human species.
		A mass extinction summary lecture from the University of North Carolina estimates that living creations are drawn from only fifty million species, but that fifty billion species may have lived on the planet.
	www.startsurfing.com /encyclopedia/e/x/t/Extinction.html (2524 words)

	Extinction (disambiguation) - Wikipedia, the free encyclopedia
		Extinction is the cessation of existence of a species or group of taxa, reducing biodiversity.
		Extinction (astronomy), the gradual reddening and dimming of light as it passes through gas and dust
		Extinction (peerage), a peerage in the United Kingdom all of whose possible heirs have died
	en.wikipedia.org /wiki/Extinction_(disambiguation) (238 words)

	Clinton Goveas :: Wikipedia Reference
		Extinction is not an unusual event in geological time — species are created by speciation, and disappear through extinction.
		The Permian-Triassic extinction event was the Earth's most severe extinction event, rendering extinct 90% of all marine species and 70% of terrestrial vertebrate species.
		In the Cretaceous-Tertiary extinction event many forms of life perished (including approximately 50% of all genera), the most often mentioned among them being the extinction of the non-avian dinosaurs.
	www.clintongoveas.com /wikipedia/?title=Evolution (9171 words)

	Devonian: devonian period, devonian reserves, devonian botanical garden
		Disambiguation: "Devonian" is sometimes used to refer to the Southwestern Brythonic language, and the people of the county of Devon are sometimes referred to as "Devonians"
		The paleogeography was dominated by the supercontinent of Gondwana to the south, the continent of Siberia to the north, and the early formation of the small supercontinent of Euramerica in the middle.
		A major extinction occurred at the boundary that marks the beginning of the last phase of the Devonian period, the Famennian faunal stage, (the Frasnian-Famennian boundary), about 364 million years ago, when all the fossil agnathan fishes suddenly disappeared.
	advantacell.com /wiki/Devonian (1329 words)

	Qwika - similar:Holocene
		The Holocene extinction event is a name customarily given to the widespread, ongoing extinction of species occurring in the modern Holocene epoch.
		Variations in CO2, temperature and dust from the Vostok ice core over the last 400 000 years An ice age is a period of long-term downturn in the temperature of Earth's climate, resulting in an expansion of the continental ice sheets, polar ice sheets and mountain glaciers ("glaciation").
		Alexander Tollmann's bolide, proposed by Kristen-Tollmann and Tollmann (1994), is a hypothesis presented by Austrian professor of geology Dr. Alexander Tollmann, suggesting that one or several bolides (asteroids or comets) struck the Earth at 7640 BCE (±200), with a much smaller one at 3150 BCE (±200).
	www.qwika.com /rels/Holocene (1695 words)

	Immunohistochemistry - In Situ Hybridization Dodo
		It is commonly used as an example of extinction, due to its alliterative powers with the word 'dead' (e.g.
		Roberts and Solow (2003) state that "the extinction of the Dodo is commonly dated to the last confirmed sighting in 1662, reported by shipwrecked mariner Volkert Evertsz" (Evertszoon), but many other sources suggest the more conjectural date 1681.
		Roberts and Solow point out that because the sighting prior to 1662 was in 1638, the Dodo was likely already very rare by the 1660s, and that thus a disputed report from 1674 cannot be dismissed off-hand.
	www.immunoportal.com /modules.php?name=Wikipedia&title=Dodo (2610 words)

	de Aussterben This article is about extinction in biology biology...
		For other article subjects named extinction see extinction (disambiguation) extinction (disambiguation)." In biology biology and ecology ecology, "extinction" is the disappearance of a species species or group of species.
		Extinction is not an unusual event in geological time geological time—species are created by speciation speciation, and disappear through extinction
		The most recent of these, the K-T extinction K-T extinction at the end of the Cretaceous Cretaceous period, is best known for having wiped out the dinosaur dinosaurs.
	www.biodatabase.de /extinct (286 words)

	Extinction event - Hutchinson encyclopedia article about Extinction event (Site not responding. Last check: 2007-11-04)
		Event that produces the extinction of many species at about the same time.
		One notable example is the boundary between the Cretaceous and Tertiary periods (known as the K-T boundary) that saw the extinction of the dinosaurs and other large reptiles, and many of the marine invertebrates as well.
		Mass extinctions have taken place frequently during Earth's history.
	encyclopedia.farlex.com /Extinction+event (119 words)

	Relict - Monstropedia - the largest encyclopedia about monsters
		Horseshoe crabs are most closely related to the Eurypterids, which disappeared in the Permian-Triassic extinction event.
		In geology, the term "relict" refers to structures or minerals from a parent rock that did not undergo metamorphosis when the surrounding rock did, or to rock that survived a destructive geologic process.
		A relict was also an ancient term for a widow, but has come to be a generic or collective term for widows and widowers.
	www.monstropedia.org /index.php?title=Relict (273 words)

	This deserves a prize! - Articles Forum at eHam.net
		In astronomy, extinction is the gradual reddening and dimming of light as it passes through gas and dust (such as the interstellar medium in the Milky Way or the atmosphere of the Earth).
		In the field of learning and memory, extinction is the process by which learned associations are actively forgotten.
		The Arabic term for extinction as an aspect of Sufi mysticism is Fana.
	www.eham.net /forums/Articles/106619 (1335 words)

	Dinosaur
		The Cretaceous-Tertiary extinction event, 65 Ma at the end of the Cretaceous, caused the extinction of all dinosaurs except for the line that had already led to the first birds.
		The Extinction of the non-avian dinosaurs is one of the most intriguing problems in Paleontology.
		Although the speed of extinction cannot be deduced from the fossil record alone, the latest models suggest the extinction was extremely rapid.
	www.ufaqs.com /wiki/en/di/Dinosaur.htm (4671 words)

	Ecology - Facts, Information, and Encyclopedia Reference article
		Each population is the result of procreations between individuals of same species and cohabitation in a given place and for a given time.
		When a population consists of an insufficient number of individuals, that population is threatened with extinction; the extinction of a species can approach when all biocenoses composed of individuals of the species are in decline.
		Lastly, an ecological crisis may be local (as an oil spill) or global (a rise in the sea level related to global warming).
	www.startsurfing.com /encyclopedia/e/c/o/Ecology.html (3411 words)

	Dodo Summary
		The source of the dodo's extinction is not certain, but recent evidence suggests that it was nearly wiped out by some natural disaster before humans even arrived on the island, its population reduced so severely that it fell below sustainable levels[2].
		However, when humans first arrived on Mauritius, they also brought with them other animals that had not existed on the island before, including sheep, dogs, pigs, rats and monkeys, which plundered the Dodo nests, while humans destroyed the forests where they made their homes.
		David Roberts states that "the extinction of the Dodo is commonly dated to the last confirmed sighting in 1662, reported by shipwrecked mariner Volkert Evertsz", but other sources suggest 1681.
	www.bookrags.com /Dodo (1752 words)

	New age / apocalypticism / end of civilization
		The end of civilization or the end of the world are phrases used in reference to human extinction scenarios, doomsday events, and related hazards which occur on a global scale.
		These are risks that would imperil humankind as a whole and/or have major adverse consequences for the course of human civilization.
		One is theorized to have caused the extinction of the dinosaurs.
	www.new-age-guide.com /new_age/end_of_civilization.htm (1946 words)

	Silurian Summary
		This mass extinction, approximately 440 mya, marked the end of the Ordovician Period and the start of the Silurian Period.
		In accord with a mass extinction, many fossils dated to the Ordovician Period are not found in Silurian Period formations.
		The base of the Silurian is set at a major extinction event when 60% of marine species were wiped out.
	www.bookrags.com /Silurian (1780 words)

	Reference page on website building - Xsite Pro affiliate marketing (Site not responding. Last check: 2007-11-04)
		The last mass extinction occurred some 65 million years ago, when a meteorite collision probably triggered the extinction of the non-avian dinosaurs and other large reptiles, but spared small animals such as mammals, which then resembled shrews.
		Wilson of Harvard University, predict that human destruction of the biosphere could cause the extinction of one-half of all species in the next 100 years.
		The extent of the current extinction event is still being researched, debated and calculated by biologists.
	www.powerrss-seoelite-xsitepro.com /market/reference-page-website-building.html?title=Nature (5623 words)

	Nature
		The last mass extinction occurred some 65 million years ago, when a meteorite collision probably triggered the extinction of the non-avian dinosaurs and other large reptiles, but spared small animals such as mammals, which then resembled shrews.
		A 1998 survey by the American Museum of Natural History found that 70% of biologists view the present era as part of a mass extinction event, the Holocene extinction event, the fastest to have ever occurred.
		Wilson of Harvard University, predict that human destruction of the biosphere could cause the extinction of one-half of all species in the next 100 years.
	www.zdnet.co.za /wiki/Nature (5653 words)

	Tiger - Gurupedia
		These tigers were hunted to extinction —the last Balinese Tiger is thought to have been killed at Sumbar Kima, West Bali on 27 September 1937; this was an adult female.
		1980s, as a result of hunting and habitat destruction, but the extinction of this subspecies was extremely probable from the 1950s onwards (when it is thought that fewer than 25 tigers remained in the wild).
		There are currently 59 known captive Chinese tigers, all within China, but these are known to be descended from only 6 animals.
	www.gurupedia.com /t/ti/tiger.htm (1262 words)

	Qwika - similar:Geologic_time_scale
		The Paleozoic, Mesozoic, and Cenozoic represent the major stages in the macroscopic fossil record.
		These eras are separated by catastrophic extinction boundaries, the P-T boundary between the Paleozoic and the Mesozoic and the K-T boundary between the...
		It covers the 65.5 million years since the Cretaceous-Tertiary extinction event at the end of the Cretaceous that marked the demise of the last dinosaurs and the end of the Mesozoic Era.
	www.qwika.com /rels/Geologic_time_scale (1626 words)

	Extirpation news
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		Starting approximately 100,000 years ago, and coinciding with an increase in the numbers and range of humans, species extinctions have increased to a rate unprecedented[3] since the Cretaceous-Tertiary extinction event.
		Endangered resources, largely protected by donations, focus on species that are already on the path to extirpation or extinction.
	www.mongabay.com /reference/eco/Extirpation.html (589 words)

	Endangered species: endangered species in the philippine, endangered species act, current list of endangered species
		At the present, the Earth has fallen from a peak of biodiversity[1] and Earth is undergoing the Holocene mass extinction period.
		Critical or critically endangered: faces an extremely high risk of extinction in the immediate future.
		It also arises from the voluminous number of yearly extinctions, often for species about which little documentation exists.
	pandapedia.com /wiki/Endangered_species (1880 words)

	Prime Directive - Memory Alpha - A Wikia wiki (Site not responding. Last check: 2007-11-04)
		If such a world was in danger, Starfleet had been known to order ships to save that world, provided it could be done without violating the Directive (TOS: "The Paradise Syndrome").
		The Directive was later amended, prohibiting Starfleet officers from intervening even if it would result in the extinction of an entire species or the end of all life on a planet or star system.
		By the 24th century the Federation had begun applying the Prime Directive to warp-capable species, refusing to interfere in internal matters such as the Klingon Civil War.
	memory-alpha.org /en/wiki/Prime_Directive (2604 words)

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