Listing species 'possible' 編目地球所有物種成可能

更新時間 2013年 2月 1日, 星期五 - 格林尼治標準時間10:58

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Crested macaques

Many species, such as these crested macaques, are in danger of dying out

最新發表在《科學》期刊裏的一項研究指出所有的植物和動物物種的名稱可在本世紀內被列出。以下是BBC科學記者Rebecca Morelle 的報道:

We've already found more than a million species, but unearthing the rest was thought to be an impossible task. But now it seems an army of amateur scientists have taken up the cause. A new study concludes that, thanks to them, we're in a golden age of discovery, with 20,000 new finds charted each year.

There could also be far fewer plants and animals left for them to find. The researchers say rather than tens of millions of species living on Earth, there could be between two and eight million. If the appetite for discovery continues to grow, they say a full ecological audit could be a possibility within the next 100 years. The scientists also looked at the numbers of species going extinct, and said this had been overestimated.

Professor Mark Costello, from the University of Auckland, is the lead author of the study:

"Suddenly people say we're in the middle of a mass extinction crisis well that's a bit premature because when we look at the extinction rates that are actually happening they're not as bad as people have been letting on"

But the International Union for the Conservation of Nature disagreed with the team's conclusion that the rate of new species found was higher than the numbers being lost. The organisation's deputy director said it was more important to save species than to count them.

Quiz 聽力測驗

True or False? Over one million species have been unearthed already.

True.

True or False? The International Union for the Conservation of Nature doesn」t believe the rate of new species found was higher than the numbers being lost.

True.

How many new species are being found each year?

20,000 new species are being found each year.

Why do the researchers think it would be possible to name all the speicies on earth within the next 100 years?

Because they believe if there are only two to eight million species left to unearth and that the appetite for discovery keeps growing, then a full ecological audit could be a possibility within the next 100 years.

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