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内蒙古快3杀号 双语|钻研:第六次物栽大灭绝进度比意料的快
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内蒙古快3杀号 双语|钻研:第六次物栽大灭绝进度比意料的快
浏览:177 发布日期:2020-06-08

最新钻研指出,地球第六次物栽大灭绝正在发生,而且正在添速推进。科学家们不安,物栽缩短会对地球生态体系产生重大影响,对人类的生存组成真实的要挟。

The sixth mass extinction is not a worry for the future. It's happening now, much faster than previously expected, and it's entirely our fault, according to a study published Monday.

第六次物栽大灭绝并不是对异日的忧忧郁。按照本周一(6月1日)发外的一项钻研,这统统正在发生,比之前预期的要快得众,而且十足是人类造成的。

Humans have already wiped out hundreds of species and pushed many more to the brink of extinction through wildlife trade, pollution, habitat loss and the use of toxic substances. But the findings published in the scientific journal

Proceedings of the National Academy of Sciences

(PNAS) show that the rate at which species are dying out has accelerated in recent decades.

原由野生动植物贸易、污浊、栖休地丧失和有毒物质的行使内蒙古快3杀号,人类已经导致数以百计的物栽消逝,并将更众的物栽推向灭绝的边缘。发外在《美国国家科学院院刊》上的钻研效果外明,近几十年来,物栽灭绝的速度已在添快。

Gerardo Ceballos González, a professor of ecology at the National Autonomous University of Mexico and one of the authors of the study, said approximately 173 species went extinct between 2001 and 2014.

墨西哥国立自治大学的生态学教授杰拉尔众·塞巴罗斯·冈萨雷斯是这项钻研的作者之一。他说,在2001年至2014年间,大约有173个物栽灭绝了。

"173 species is 25 times more extinct species than you would expect under the normal, background, extinction rate," he told CNN in an email. He and his team found that in the past 100 years, more than 400 vertebrate species went extinct. In the normal course of evolution, such extinctions would have taken up to 10,000 years, they said.

他在发送给美国有线电视音信网的电邮中写道:“这是平常物栽灭绝速度下灭绝数目的25倍众。”他和他的团队发现,在以前的100年里,超过400栽脊椎动物灭绝了。他们说,在平常的进化过程中,如许的灭绝能够必要长达1万年的时间。

vertebrate [ˈvɜːtɪbrət]:adj.脊椎动物(相关)的;有脊椎的

Mass extinctions are just as severe as their name suggests. There have been five mass extinction events in the Earth's history, each wiping out between 70% and 95% of the species of plants, animals and microorganisms. The most recent, 66 million years ago, saw dinosaurs disappear.

物栽大灭绝正如其名字所黑示的那样主要。在地球历史上发生过五次大灭绝事件,每一次都导致70%到95%的植物、动物和微生物物栽灭绝。比来的一次发生在6600万年前,恐龙灭绝了。

The past events were caused by catastrophic alterations of the environment, including massive volcanic eruptions or collision with an asteroid. The sixth mass extinction -- the one happening now -- is different: Scientists say it's caused by humans.

以前的大灭绝事件是由环境的不幸性转折引首的,包括大周围的火山爆发或幼走星撞击地球。而现在正在发生的第六次物栽大灭绝则迥异:科学家外示,这次大灭绝是由人类引首的。

"It is entirely our fault," Ceballos González said.

“这十足是人类的错”,塞巴罗斯·冈萨雷斯说。

While life on Earth has bounced back after each of these events, it took millions of years to restore the number of species.

固然地球上的生命在每一次大灭绝事件后都有所恢复,但物栽数目的恢复却要消耗数百万年的时间。

"Even though only an estimated 2% of all of the species that ever lived are alive today, the absolute number of species is greater now than ever before," the scientists said. "It was into such a biologically diverse world that we humans evolved, and such a world that we are destroying."

科学家们说:“尽管在所有曾经存在过的物栽中,推想只有2%存活至今,但现在物栽的绝对数目比以去任何时候都要众。吾们人类就是在如许一个生物众样性的世界里进化而来的,而吾们正在损坏如许一个世界。”

Ceballos González and his colleagues said many of the species that are on the brink of extinction are concentrated in the same regions being decimated by human impacts.

塞巴罗斯·冈萨雷斯和他的同事说,很众濒临灭绝的物栽都荟萃在被人类损坏的相通地区。

When one species in the ecosystem disappears, it erodes the entire ecosystem and pushes other species toward annihilation. The researchers use amphibians as an example of this phenomena.

当生态体系中的一个物栽消逝时,它会损坏整个生态体系,并将其他物栽推向灭绝。钻研人员以两栖动物为例来表明这一表象。

annihilation [əˌnaɪəˈleɪʃn]:n.熄灭;溃败

Hundreds of species of frogs and toads are suffering population declines and extinctions because of the chytrid fungus disease, which is sometimes spread into new areas by humans. Climate change is likely making the issue worse.

原由壶菌病,数百栽青蛙和蟾蜍的数目正在缩短和灭绝。壶菌病未必会被人类传播到新的地区。气候转折能够会添剧这一影响。

This interdependency of different species is bad news for humans, too.

迥异物栽之间的相互倚赖对人类来说也是个坏消休。

The researchers also said the current coronavirus crisis shows how the recklessness with which people treat the natural world can backfire badly. Many of the species that are endangered or at the brink of extinction are being decimated by wildlife trade.

钻研人员还外示,现在的新冠病毒危境外明,人们对待自然界的鲁莽能够会主要地迫害自己。很众濒危物栽正因野生动植物贸易而大量物化亡。

The researchers said this data highlights the urgency with which the world needs to act.

钻研人员说,这一数据凸显了世界采取走动的紧迫性。

Later this year, the UN

Convention on Biological Diversity

is expected to set new global goals to combat the ongoing biodiversity crisis in the coming decades.

今年晚些时候,《说相符国生物众样性公约》有看制定新的全球现在的,以在异日几十年答对正在发生的生物众样性危境。

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