Tonka
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http://www.radiodelmar.cl/?p=6383
Spanish to English translation
Scientists warn of a probable mass extinction of marine animals
Santiago de Chile, April 27, 2011. (Mar. Radio Source: AP) The ocean ecosystems are on the verge of recording a change following the launch of a mass extinction of marine species, driven by climate change, overfishing and other actions man, reveals an Australian scientific research.
Research conducted by Professor Palaeozoology, John Alroy, said from the study of fossils of the largest groups of marine animals, which approximates a massive extinction of species, greater than that which occurred 65 million years ago when the dinosaurs disappeared.
"Organisms in the past adapted, this time they may not," he told Australian media that Palaeozoology marine researcher Department of Biological Sciences at Macquarie University in Sydney.
COMPREHENSIVE RESEARCH
Alroy's thesis, published in the latest edition of the journal Science, is based on data obtained after examining some 100,000 collections around the world made up of marine fossils that lived about 500 million years.
Alroy, an alumnus of the American professor Jack Sepkoski, the paleontologist who suggested that the disappearance of the dinosaurs was part of a five mass extinctions that occurred over a period of 550 million years, says the looming extinction is a consequence of behavior and human effects of climate change.
"It is not only a mass extinction, is also going on a massive replacement of species around the globe. We are ruining the environment and simultaneously selectively eliminating certain species groups, "warned the scientist.
CAUSES OF EXTINCTION
Unlike the last mass extinction caused by the impact on Earth of an asteroid, the new will result from the combination of many factors, including the introduction of animals into a habitat that was not theirs, the use of pesticides and fertilizers, pollution and deforestation.
Alroy's study reveals that those species that are most rampant are not guaranteed the survival and cites as an example what happened to two of the most abundant before the mass extinction recorded Permian-Triassic 250 million years ago.
It concluded that while the coral "the diversity recovered" after almost disappearing during the Triassic period, similar species that dominated the sea floor and called brachiopod, a similar appearance to the oyster, has since become a rarity.
RESET STATUS
According to Alroy, their study shows that the current crisis may cause changes in marine ecosystems beyond what experts venture to predict.
"We do not know which groups suffer most, which will recover quickly, or which end up having a high or low level balance in their diversity," said study author told Australian radio ABC.
In this sense, Alroy said that "it is not that some groups of species have good luck and others bad, what happens is that there has been a readjustment of evolution ***** END ".*****
Spanish to English translation
Scientists warn of a probable mass extinction of marine animals
Santiago de Chile, April 27, 2011. (Mar. Radio Source: AP) The ocean ecosystems are on the verge of recording a change following the launch of a mass extinction of marine species, driven by climate change, overfishing and other actions man, reveals an Australian scientific research.
Research conducted by Professor Palaeozoology, John Alroy, said from the study of fossils of the largest groups of marine animals, which approximates a massive extinction of species, greater than that which occurred 65 million years ago when the dinosaurs disappeared.
"Organisms in the past adapted, this time they may not," he told Australian media that Palaeozoology marine researcher Department of Biological Sciences at Macquarie University in Sydney.
COMPREHENSIVE RESEARCH
Alroy's thesis, published in the latest edition of the journal Science, is based on data obtained after examining some 100,000 collections around the world made up of marine fossils that lived about 500 million years.
Alroy, an alumnus of the American professor Jack Sepkoski, the paleontologist who suggested that the disappearance of the dinosaurs was part of a five mass extinctions that occurred over a period of 550 million years, says the looming extinction is a consequence of behavior and human effects of climate change.
"It is not only a mass extinction, is also going on a massive replacement of species around the globe. We are ruining the environment and simultaneously selectively eliminating certain species groups, "warned the scientist.
CAUSES OF EXTINCTION
Unlike the last mass extinction caused by the impact on Earth of an asteroid, the new will result from the combination of many factors, including the introduction of animals into a habitat that was not theirs, the use of pesticides and fertilizers, pollution and deforestation.
Alroy's study reveals that those species that are most rampant are not guaranteed the survival and cites as an example what happened to two of the most abundant before the mass extinction recorded Permian-Triassic 250 million years ago.
It concluded that while the coral "the diversity recovered" after almost disappearing during the Triassic period, similar species that dominated the sea floor and called brachiopod, a similar appearance to the oyster, has since become a rarity.
RESET STATUS
According to Alroy, their study shows that the current crisis may cause changes in marine ecosystems beyond what experts venture to predict.
"We do not know which groups suffer most, which will recover quickly, or which end up having a high or low level balance in their diversity," said study author told Australian radio ABC.
In this sense, Alroy said that "it is not that some groups of species have good luck and others bad, what happens is that there has been a readjustment of evolution ***** END ".*****