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

一个同样重要的标准是，一个物种是否有能力在全球任一生态灾难中生存下来。

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This strategy of direct access to a maximum number of ecological zones by a single group is called vertical economy.

单一集团直接进入最大数量的生态区的战略称为垂直型经济。

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The study says mangrove trees provide more than one and a half billion dollars worth of services to ecological systems worldwide.

VOA: special.2010.04.20

Meredith Schafer presented the findings at a recent meeting of the Ecological Society of America.

VOA: special.2010.09.14

He says the global economy must change to a sustainable system now before social issues and ecological degradation become overwhelming.

VOA: standard.2010.01.23

The new species were discovered as part of a CI program aimed at assessing the ecological health of a given area.

CNN: New species found in Colombian forests

Individual country trends: Algeria experienced the largest change in national ecological assets balance, moving from a large reserve in 1961 to a large ecological deficit in 2008.

UNESCO: OFFICE IN VENICE

As scientists scramble to understand the ecological fallout, a massive research effort is ramping up.

WSJ: Gauging Harm to Ecosystem Could Take Years