For ecological studies, the most important factor is collecting identifiable samples of as many of the different species present as possible.

对于生态学研究来说，最重要的是收集尽可能多的不同物种的可识别样本。

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Ecological services function is one of hot topics in today's ecological studies.

生态系统服务功能是当今生态学的一个热点研究领域。

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Ecological studies are in progress to identify the natural reservoir of both Marburg and Ebola.

确定导致马尔堡与埃博拉病毒宿主的生态学研究正在进行中。

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Ecological studies on the restoration of degraded forest land, the conservation of medicinal plants and their sustainable harvesting are being conducted at Achanakmar-Amarkantak.

UNESCO: EDUCATION

However, until the ecological studies are completed, scientists will still be very much in the dark about the origins of this mysterious illness.

BBC: Africa's emerging virus threat

Extensive ecological studies are underway in three African countries, including DR Congo, to try to find the "reservoir" - this work essentially involves checking for signs of the virus in thousands of different species of animal, in order to identify the carrier.

BBC: Africa's emerging virus threat