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Mass extinction 252 million years ago coincided with an increase in carbon dioxide

Mass extinction 252 million years ago coincided with an increase in carbon dioxide Facts

Presumably the first living organisms appeared 3.8 billion years ago. Over the past 500 million years on Earth happened five mass extinctions. Scientists agree that dinosaurs may have become extinct 66 million years ago with the fall of a huge asteroid. Greatest mass extinction, during which lost some 90% of marine and terrestrial species, occurred at the end of the Permian period 250 million years ago. But the reason has not yet been established.

Researchers at MIT have come to two conclusions about the mass extinction.

Continue reading Mass extinction 252 million years ago coincided with an increase in carbon dioxide

The asteroid that killed the dinosaurs, did not touch a life in freshwater?

31.07.2013

 

Scientists now have fresh evidence that the asteroid impact that led to the end of the era of the dinosaurs, occurred near the present city of Chikalaba, which is located in Mexico. This cosmic impact of a ten asteroid killed many creatures on land and in the sea, but scientists have discovered that living organisms, located in a clash in fresh water, managed to avoid this fate. According to new research, described in detail in the Journal of Geophysical Research-Biogeosciences,

Continue reading The asteroid that killed the dinosaurs, did not touch a life in freshwater?

Sweden: Mass extinction of elk

August 31, 2013. In the forests of the southern regions of Sweden recorded the mass extinction of elk. Primarily affected juveniles. Scientists suggest that the cause of the phenomenon is not yet clear plague of animals can be global climate change.

The most complicated situation on the island of Öland. During the week there died a few dozen animals. At the moment, the local herd of not more than 300 animals. According to experts, hunters, one of the reasons for the high mortality of elk is the increased lately density of animals in terms of square miles. It is believed

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Earth is closer to the next mass extinction of life

Forecast

03.04.11. American scientists claim that humanity is approaching a massive extinction of all life, as tens of millions of years ago, when the Earth with dinosaurs disappeared. According to the authors, the results of which were published in the journal Nature, if we do not take action, the deleterious effects of human activities on ecosystems will have for several centuries to a full 75% of the extinction of all life on our planet. Restoration of life after such an event of apocalyptic scale delayed for millions of years.

To such a disappointing conclusion the American scientists led by Professor

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On Earth, a new period of mass extinction of species

22.03.2004

22.03.2004

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The presently observed the disappearance of the species reaches a pre-historic proportions. Nature is dying, not only in the distant jungles of Brazil, but also directly to our eyes, writes Die Welt.

British biologists published a review of the problem of species extinction in Europe. In the

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The dinosaurs were doomed to extinction

Numerous studies have shown that a population of dinosaurs living in the territory of what is now North America — has already begun to die out before the planet fell a huge asteroid.

The meteorite that collided with our planet 65 million years ago — was just one of the factors that could affect the extinction of the dinosaurs, not counting the birds. Incidentally, the site http://in-green.com.ua you can buy excellent mower at the most affordable prices in Ukraine.

By this time also applies to sea level

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Mass mortality of oysters in Chesapeake, USA

Animals

11.09.11. Mass mortality of oysters recorded in Chesapeake. Population of oysters on the coast is on the verge of extinction.

Oysters died of natural causes every season, but now it takes a catastrophic scale. Oysters are in great demand, but now the fishermen can not provide all the suppliers in connection with the mass extinction of a species.

The northern part of the bay has turned into one huge cemetery delicacy. What caused the death of oyster populations — not known.

Source: CBS Baltimore, Earth — The Chronicles of Life

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Warming could lead to the extinction of up to 10% of bird species by 2100

Changes in the Earth's climate by 3.5 degrees by 2100, could lead to the disappearance of the 600 to 900 species of birds, according to an article in Biological Conservation.

According to international experts on climate change, Earth's average temperature by the end of the 21st century may rise at most by 1.8 degrees, and at worst — 4.6.

The study was conducted by an international team of scientists led by Chagan Shakerioglu (Cagan Sekercioglu) from the University of Utah.

"With the increase in surface temperature by 3.5 degrees by 2100, may disappear from 600 to 900 species of

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Extinction of animals does not lead to the formation of new species

In the Earth's history, paleontologists are five major mass extinctions of species, the last case of 65.5 million years ago and led to the extinction of dinosaurs. Previously it was believed that the extinction of one leads to the rapid development of others.

It turned out that this is not true — American paleontologists have concluded that the explosive expansion of the species diversity is not necessarily associated with episodes of mass extinction. With the disappearance of almost disappears and the competition, and it is a factor in evolutionary explosion, RIA Novosti reported. A group led by David Bapst

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Earth died out more than once

Photo: USGS Over the past 500 million years happened five mass extinctions, during which disappears up to 95% of all animal species that inhabit the Earth. Igor Popov knows what could cause this.

The study of geological layers that are deposited during the long history of the Earth draws majestic picture of global changes of fauna and flora: some organisms in many disappear and others appear. Studies of such events ("biostratigraphic events" or "biosobyty") are important, because on the basis of these data the geologic time scale — scheme and periodization. It is the basis of geology, and hence

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