Shifts in forest species composition ramify through the ecosystem in many ways because tree species have different, often unique properties.

由于树种具有不同的、往往是独特的特性，森林物种组成的变化以多种方式影响着生态系统。

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One theory behind savanna formation is that wet forest species are unable to withstand the dry season, and thus savanna, rather than rain forest, is favored on the site.

热带草原形成的理论之一，就是湿润的森林物种无法承受旱季，因此这更有利于热带草原，而不是热带雨林的形成。

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Increasing habitat loss is likely to trap forest species, stopping them from seeking more favourable climates or elevations.

越来越多的生存地遭到破坏，这很可能困住森林物种，阻止它们寻找更有利的气候或是更高的海拔。

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The concept of sustainable use of biodiversity is essential in this regard: it means that forest species, ecosystems and genes are used in a way and at a rate that does not lead to the long-term decline of biodiversity, thereby maintaining its potential to meet the needs and aspirations of present and future generations.

UNESCO: Indigenous Peoples

On Friday up to 300 people are expected to start replanting in the most severely damaged area of Crowthorne Forest with species including sweet chestnuts, sequoia, Douglas firs and mountain pines.

BBC: Burnt forest rises from the ashes

They will record plant species, forest structure, ash cover, soil properties, river sediment and the overall topography of the burned area.

ECONOMIST: A 30-year plan to study America��s ecology is about to begin