Yet an equally important criterion is the ability of a species to survive random global ecological catastrophes due to impacts.

然而一个同样重要的标准是，物种在随机性全球生态灾难中幸存的能力。

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Following each mass extinction, there is a sudden evolutionary burst as new species develop to fill the ecological niches opened by the event.

在每一次物种大灭绝后，都有一次突然的进化爆发，因为会有新物种出现来填补灭绝创造的生态位。

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Many zoologists believe that it was because so many ecological niches were available with virtually no competition from existing species.

很多动物学家认为，这是因为，在几乎没有任何现存竞争物种的情况下，有太多的生态小生境可供生存。

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Ecological surveys found species including Breckland mugwort plants, reptiles, bats, badgers, great crested newts and birds which need protection.

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We don't yet know which species will benefit, and which will suffer in response to the changes, but because each species plays a specific ecological role on the tundra, the downfall of one species or proliferation of another could have a domino effect that disrupts the tundra's delicate food web.

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They also provide a habitat for fish and other species of ecological and commercial interest, such as orange roughy, swordfish, tuna, sharks, turtles and whales.

UNESCO: MEDIA SERVICES